Microcapsule self-repairing material constitutive curve prediction method and device

Abstract

The application provides a microcapsule self-repairing material constitutive curve prediction method and device, and relates to the technical field of tunnel and underground engineering materials, and aims to solve the problem that the mesoscopic mechanics model cannot reflect and predict the softening stage after the peak value of a cement-based material in the prior art. The method comprises the following steps: if the self-repairing concrete material is a conventional concrete material, calculating the constitutive curve of the conventional concrete material under tensile load in a plane strain condition; if the self-repairing concrete material is a microcapsule self-repairing concrete material containing a strong healing agent, calculating the constitutive curve of the microcapsule self-repairing concrete material containing the strong healing agent under tensile load in a plane strain condition; and if the self-repairing concrete material is a microcapsule self-repairing concrete material containing a weak healing agent, calculating the constitutive curve of the microcapsule self-repairing concrete material containing the weak healing agent under tensile load in a plane strain condition. The microcapsule self-repairing material constitutive curve prediction device is applied to the microcapsule self-repairing material constitutive curve prediction method.

Description

Technical Field

[0001] This invention relates to the field of tunnel and underground engineering materials technology, and in particular to a method and apparatus for predicting the constitutive curve of a microcapsule self-healing material. Background Technology

[0002] Due to the inherent brittleness and low tensile strength of concrete, numerous microcracks are unavoidable in concrete or reinforced concrete structures. These microcracks provide pathways for the transport of harmful substances such as carbon dioxide from the air, acid rain, various salt solutions, and chloride ions from water. These substances lead to steel corrosion, deterioration of material properties, and accelerated propagation of microcracks in the matrix, thereby shortening the service life of the structure. Simultaneously, these deterioration processes can combine with freeze-thaw cycles, alkali-aggregate reactions, and steel corrosion to further accelerate the deterioration of concrete materials. If these microcracks form a continuous network, the permeability of the concrete will increase significantly, and its water resistance and resistance to intrusive substances will decrease. Therefore, large-scale maintenance is necessary to ensure structural safety and extend its service life. Repairing concrete cracks during maintenance has long been a technical problem that has plagued building technicians.

[0003] Currently, the solution to cracking in concrete structures is typically achieved through regular inspection and maintenance programs. These rely on non-destructive testing and manual intervention, which is time-consuming, labor-intensive, and expensive, resulting in relatively high costs. In many cases, internal material damage is difficult to detect, or even if detected, it may not be repaired in time, leading to further serious consequences. With the development of modern society towards intelligence, this passive approach of post-construction and periodic maintenance can no longer meet the requirements of modern multifunctional intelligent buildings for concrete materials. Based on the self-healing phenomenon in the biological field, materials scientists have attempted to develop artificial self-healing materials capable of automatically repairing damage. Among these artificial self-healing materials, cement-based cementitious composites with self-healing functions have become a hot topic with broad application prospects. Many scholars have quantitatively analyzed the self-healing ability of microcapsule self-healing concrete with different repair agents through experimental methods. However, to quantitatively study the damage-repair effect of microcapsule self-healing concrete, the focus should be on studying its damage-repair constitutive model and multi-scale mechanical properties.

[0004] Currently, research on the damage-repair constitutive model and multi-scale mechanical properties of microcapsule self-healing concrete is scarce. Zhu Hehua et al. proposed two microscopic damage-repair mechanical models for microcapsule self-healing concrete based on the assumption of plane strain, targeting tensile and compressive loads respectively. Before the applied load reaches its bearing limit, the material undergoes a certain degree of strain hardening, similar to the constitutive behavior of some high-strength metallic materials. However, after the applied load reaches its bearing limit, the material experiences varying degrees of sudden stress drop and strain softening. Regarding methods for predicting the constitutive curve of microcapsule self-healing concrete, there is currently no microscopic mechanical model that can reflect and predict the softening stage after the peak load. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a method and apparatus for predicting the constitutive curve of microcapsule self-healing materials, thereby solving the problem that existing micromechanical models under two-dimensional strain conditions cannot reflect and predict the softening stage after the peak value of microcapsule self-healing concrete materials.

[0006] This invention provides a method for predicting the constitutive curve of a microcapsule self-healing material, the method comprising:

[0007] Determine whether self-healing concrete materials contain microcapsules;

[0008] If not, then the self-healing concrete material is a conventional concrete material, and the constitutive curve of the conventional concrete material under tensile load under plane strain conditions is calculated.

[0009] If so, determine the fracture load of the repaired microcrack. If the fracture load of the repaired microcrack is greater than or equal to the original fracture load of the microcrack in the self-healing concrete material without microcapsules, then the self-healing concrete material is a self-healing concrete material with microcapsules containing a strong healing agent. Calculate the constitutive curve of the self-healing concrete material with microcapsules containing a strong healing agent under tensile load under plane strain conditions. If the fracture load of the repaired microcrack is less than the original fracture load of the microcrack in the self-healing concrete material without microcapsules, then the self-healing concrete material is a self-healing concrete material with microcapsules containing a weak healing agent. Calculate the constitutive curve of the self-healing concrete material with microcapsules containing a weak healing agent under tensile load under plane strain conditions.

[0010] Preferably, the formula for calculating the constitutive curve of conventional concrete under tensile load under plane strain conditions is:

[0011] Formula for linear elastic stage:

[0012] Nonlinear stage formula:

[0013] Stress drop stage formula:

[0014] Formula for the strain softening stage:

[0015]

[0016] Where ε represents the strain of the concrete specimen, σ represents the stress of the concrete specimen, ν represents the Poisson's ratio of the concrete specimen, A represents the area of ​​the concrete specimen, E represents the initial elastic modulus of the concrete, N represents the number of microcracks in the concrete specimen, a0 represents the initial radius of the microcracks, and a u a represents the radius of the microcrack after its first expansion. s This represents the radius after the second microcrack is activated and propagates.

[0017] Preferably, if the fracture load of the repaired microcrack is greater than or equal to the original fracture load of the microcrack in the self-healing concrete material without microcapsules, then the self-healing concrete material is a self-healing concrete material containing microcapsules with a strong healing agent; if the fracture load of the repaired microcrack is less than the original fracture load of the microcrack in the self-healing concrete material without microcapsules, then the self-healing concrete material is a self-healing concrete material containing microcapsules with a weak healing agent, including:

[0018] like The repaired microcrack fracture load is greater than or equal to the original fracture load of the microcrack in the self-healing concrete material without microcapsules, wherein the self-healing concrete material is a self-healing concrete material containing microcapsules with a strong healing agent.

[0019] in,

[0020] σ cc K represents the original fracture load of microcracks in self-healing concrete materials without microcapsules. ICC θ represents the fracture toughness of unrepaired microcracks. h1 α represents the spatial dip angle at the boundary between unrepaired and repaired microcracks. u σ represents the radius of the microcrack after its first propagation. h c K represents the microcrack fracture load that was repaired. h IC α represents the fracture toughness of microcracks repaired after the healing agent contained in the microcapsules in self-healing concrete materials has cured. h Indicates the radius of the microcrack after repair;

[0021] like The repaired microcrack fracture load is less than the original fracture load of the microcrack in the self-healing concrete material without microcapsules, wherein the self-healing concrete material is a self-healing concrete material containing microcapsules with a weak healing agent.

[0022] in,

[0023] σ cc K represents the original fracture load of microcracks in self-healing concrete materials without microcapsules. ICC θ represents the fracture toughness of unrepaired microcracks. h1 α represents the spatial dip angle at the boundary between unrepaired and repaired microcracks. u σ represents the radius of the microcrack after its first propagation. h c K represents the fracture load of the microcrack after repair. h IC α represents the fracture toughness of microcracks repaired after the healing agent contained in the microcapsules in self-healing concrete materials has cured. h This indicates the radius of the microcrack after repair.

[0024] Preferably, the formula for calculating the constitutive curve of self-healing concrete material containing microcapsules with strong healing agent under tensile load under plane strain conditions is:

[0025] Formula for linear elastic stage:

[0026] Nonlinear stage formula:

[0027] Stress drop stage formula:

[0028] Formula for the strain softening stage:

[0029]

[0030] Where ε represents the strain of the concrete specimen, σ represents the stress of the concrete specimen, ν represents the Poisson's ratio of the concrete specimen, A represents the area of ​​the concrete specimen, E represents the initial elastic modulus of the concrete, N represents the number of microcracks in the concrete specimen, a0 represents the initial radius of the microcracks, and α h a represents the radius of the repaired microcrack. u This represents the radius of the microcrack after its first expansion.

[0031] Preferably, the formula for calculating the constitutive curve of self-healing concrete material containing microcapsules of weak healing agent under tensile load under plane strain conditions is:

[0032] Formula for linear elastic stage:

[0033] Nonlinear stage formula:

[0034] Stress drop stage formula:

[0035] Formula for the strain softening stage:

[0036]

[0037] Where ε represents the strain of the concrete specimen, σ represents the stress of the concrete specimen, ν represents the Poisson's ratio of the concrete specimen, A represents the area of ​​the concrete specimen, E represents the initial elastic modulus of the concrete, N represents the number of microcracks in the concrete specimen, a0 represents the initial radius of the microcracks, and α h a represents the radius of the repaired microcrack. u This represents the radius of the microcrack after its first expansion.

[0038] Compared with the prior art, the method for predicting the constitutive curve of a microcapsule self-healing material provided by the embodiments of the present invention has the following beneficial effects: The present invention first determines whether the self-healing concrete material contains microcapsules; if not, the self-healing concrete material is a conventional concrete material, and the constitutive curve of the conventional concrete material under tensile load under plane strain conditions is calculated; if yes, the fracture load of the repaired microcrack is determined; if the fracture load of the repaired microcrack is greater than or equal to the original fracture load of the microcrack in concrete without microcapsules, the self-healing concrete material is a self-healing concrete material containing microcapsules with strong healing agent, and the constitutive curve of the self-healing concrete material containing microcapsules with strong healing agent under tensile load under plane strain conditions is calculated; if the fracture load of the repaired microcrack is less than the original fracture load of the microcrack in concrete without microcapsules, the self-healing concrete material is a self-healing concrete material containing microcapsules with weak healing agent, and the constitutive curve of the self-healing concrete material containing microcapsules with weak healing agent under tensile load under plane strain conditions is calculated. This invention can calculate the constitutive curves of conventional concrete materials without microcapsules, self-healing concrete materials with microcapsules containing strong healing agents, and self-healing concrete materials with microcapsules containing weak healing agents under tensile loads under plane strain conditions. In other words, it can establish stress-strain curves of concrete materials with or without microcapsules under tensile loads, and can directly reflect and predict the micromechanical model of the softening stage after the peak value of concrete materials.

[0039] The present invention also provides a device for predicting the constitutive curve of a microcapsule self-healing material, the device comprising:

[0040] The judgment module is used to determine whether the self-healing concrete material contains microcapsules;

[0041] The first constitutive curve module is used to calculate the constitutive curve of conventional concrete material under tensile load under plane strain conditions when the self-healing concrete material does not contain microcapsules and the self-healing concrete material is conventional concrete material.

[0042] The second constitutive curve module is used to calculate the constitutive curve of the self-healing concrete material with strong healing agent microcapsules under tensile load under plane strain conditions when the fracture load of the repaired microcrack is greater than or equal to the original fracture load of the microcrack in the self-healing concrete material without microcapsules.

[0043] The third constitutive curve module is used to calculate the constitutive curve of the self-healing concrete material containing microcapsules with weak healing agent under tensile load under plane strain conditions when the fracture load of the repaired microcrack is less than the original fracture load of the microcrack in the self-healing concrete material without microcapsules.

[0044] Preferably, the formula for calculating the constitutive curve of conventional concrete under tensile load under plane strain conditions is:

[0045] Formula for linear elastic stage:

[0046] Nonlinear stage formula:

[0047] Stress drop stage formula:

[0048] Formula for the strain softening stage:

[0049]

[0050] Where ε represents the strain of the concrete specimen, σ represents the stress of the concrete specimen, ν represents the Poisson's ratio of the concrete specimen, A represents the area of ​​the concrete specimen, E represents the initial elastic modulus of the concrete, N represents the number of microcracks in the concrete specimen, a0 represents the initial radius of the microcracks, and a u a represents the radius of the microcrack after its first expansion. s This represents the radius after the second microcrack is activated and propagates.

[0051] Preferably, the formula for calculating the constitutive curve of self-healing concrete material containing microcapsules with strong healing agent under tensile load under plane strain conditions is:

[0052] Formula for linear elastic stage:

[0053] Nonlinear stage formula:

[0054] Stress drop stage formula:

[0055] Formula for the strain softening stage:

[0056]

[0057] Where ε represents the strain of the concrete specimen, σ represents the stress of the concrete specimen, ν represents the Poisson's ratio of the concrete specimen, A represents the area of ​​the concrete specimen, E represents the initial elastic modulus of the concrete, N represents the number of microcracks in the concrete specimen, a0 represents the initial radius of the microcracks, and a u a represents the radius of the microcrack after its first expansion. s This represents the radius after the second microcrack is activated and propagates.

[0058] Preferably, the formula for calculating the constitutive curve of self-healing concrete material containing microcapsules of weak healing agent under tensile load under plane strain conditions is:

[0059] Formula for linear elastic stage:

[0060] Nonlinear stage formula:

[0061] Stress drop stage formula:

[0062] Formula for the strain softening stage:

[0063]

[0064] Where ε represents the strain of the concrete specimen, σ represents the stress of the concrete specimen, ν represents the Poisson's ratio of the concrete specimen, A represents the area of ​​the concrete specimen, E represents the initial elastic modulus of the concrete, N represents the number of microcracks in the concrete specimen, a0 represents the initial radius of the microcracks, and α h a represents the radius of the repaired microcrack. u This represents the radius of the microcrack after its first expansion.

[0065] Compared with the prior art, the beneficial effects of the device for predicting the constitutive curve of microcapsule self-healing materials provided by the present invention are the same as the beneficial effects of the method for predicting the constitutive curve of microcapsule self-healing materials described in the above technical solution, and will not be repeated here.

[0066] The present invention also provides an electronic device, including a bus, a transceiver, a memory, a processor, and a computer program stored in the memory and executable on the processor. The transceiver, the memory, and the processor are connected via the bus. When the computer program is executed by the processor, it implements the steps in the method for predicting the constitutive curve of a microcapsule self-healing material as described in any of the preceding claims.

[0067] Compared with the prior art, the beneficial effects of the electronic device provided by the present invention are the same as those of the method for predicting the constitutive curve of a microcapsule self-healing material described in the above technical solution, and will not be repeated here.

[0068] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0069] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0070] Figure 1 A flowchart of a method for predicting the constitutive curve of a microcapsule self-healing material provided in an embodiment of the present invention is shown;

[0071] Figure 2 A schematic diagram illustrating the classification of cement-based composite materials provided in embodiments of the present invention is shown;

[0072] Figure 3 Constitutive curves of concrete with or without microcapsules under tensile loads, provided by embodiments of the present invention, are shown.

[0073] Figure 4 A schematic diagram of the structure of a device for predicting the constitutive curve of a microcapsule self-healing material provided in an embodiment of the present invention is shown. Detailed Implementation

[0074] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0075] In this embodiment, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Words such as "exemplary" or "for example" are used to indicate examples, illustrations, or explanations, intended to present related concepts in a specific manner, and should not be construed as superior or more advantageous than other embodiments or designs.

[0076] This invention provides a method for predicting the constitutive curve of a microcapsule self-healing material. Figure 1A flowchart illustrating a method for predicting the constitutive curve of a microcapsule self-healing material according to an embodiment of the present invention is shown. Figure 1 As shown, the method includes:

[0077] Step 1: Determine whether the self-healing concrete material contains microcapsules.

[0078] It should be understood that self-healing concrete materials can be cement-based composite materials. The first step is to determine whether the self-healing concrete material contains microcapsules. Figure 2 A schematic diagram illustrating the classification of cement-based composite materials provided in an embodiment of the present invention is shown.

[0079] Step 2: As Figure 2 As shown, if the self-healing concrete material does not contain microcapsules, then the self-healing concrete material is a conventional concrete material. The constitutive curve of the conventional concrete material under tensile load under plane strain conditions is calculated according to the following formula:

[0080] Formula for linear elastic stage:

[0081] Nonlinear stage formula:

[0082] Stress drop stage formula:

[0083] Formula for the strain softening stage:

[0084]

[0085] Where ε represents the strain of the concrete specimen, σ represents the stress of the concrete specimen, ν represents the Poisson's ratio of the concrete specimen, A represents the area of ​​the concrete specimen, E represents the initial elastic modulus of the concrete, N represents the number of microcracks in the concrete specimen, a0 represents the initial radius of the microcracks, and a u a represents the radius of the microcrack after its first expansion. s This represents the radius after the second microcrack is activated and propagates.

[0086] Step 3: If the self-healing concrete material contains microcapsules, then determine the fracture load of the repaired microcracks. It should be understood that the fracture load of the repaired microcracks here refers to the fracture load on the surface of the microcracks after the microcrack propagation has been repaired.

[0087] Step 4: If in, σ cc K represents the original fracture load of microcracks in self-healing concrete materials without microcapsules. ICC θ represents the fracture toughness of unrepaired microcracks. h1 α represents the spatial dip angle at the boundary between unrepaired and repaired microcracks.u σ represents the radius of the microcrack after its first propagation. h c K represents the fracture load of the microcrack after repair. h IC α represents the fracture toughness of microcracks repaired after the healing agent contained in the microcapsules in self-healing concrete materials has cured. h Indicates the radius of the microcrack after repair;

[0088] If the fracture load of the repaired microcrack is greater than or equal to the original fracture load of the microcrack in the self-healing concrete material without microcapsules, then the self-healing concrete material is a self-healing concrete material containing microcapsules with a strong healing agent. The constitutive curve of the self-healing concrete material containing microcapsules with a strong healing agent under tensile load under plane strain conditions is calculated according to the following formula:

[0089] Formula for linear elastic stage:

[0090] Nonlinear stage formula:

[0091] Stress drop stage formula:

[0092] Formula for the strain softening stage:

[0093]

[0094] Where ε represents the strain of the concrete specimen, σ represents the stress of the concrete specimen, ν represents the Poisson's ratio of the concrete specimen, A represents the area of ​​the concrete specimen, E represents the initial elastic modulus of the concrete, N represents the number of microcracks in the concrete specimen, a0 represents the initial radius of the microcracks, and α h a represents the radius of the repaired microcrack. u This represents the radius of the microcrack after its first expansion.

[0095] Step 5: If in, σ cc K represents the original fracture load of microcracks in self-healing concrete materials without microcapsules. ICC θ represents the fracture toughness of unrepaired microcracks. h1 α represents the spatial dip angle at the boundary between unrepaired and repaired microcracks. u σ represents the radius of the microcrack after its first propagation. h c K represents the fracture load of the microcrack after repair. h IC α represents the fracture toughness of microcracks repaired after the healing agent contained in the microcapsules in self-healing concrete materials has cured. hIndicates the radius of the microcrack after repair;

[0096] The fracture load of the repaired microcracks is less than the original fracture load of the microcracks in the self-healing concrete material without microcapsules. The self-healing concrete material is a self-healing concrete material containing microcapsules with a weak healing agent. The constitutive curve of the self-healing concrete material with microcapsules containing a weak healing agent under tensile load under plane strain conditions is calculated according to the following formula:

[0097] Formula for linear elastic stage:

[0098] Nonlinear stage formula:

[0099] Stress drop stage formula:

[0100] Formula for the strain softening stage:

[0101]

[0102] Where ε represents the strain of the concrete specimen, σ represents the stress of the concrete specimen, ν represents the Poisson's ratio of the concrete specimen, A represents the area of ​​the concrete specimen, E represents the initial elastic modulus of the concrete, N represents the number of microcracks in the concrete specimen, a0 represents the initial radius of the microcracks, and α h a represents the radius of the repaired microcrack. u This represents the radius of the microcrack after its first expansion.

[0103] The method for predicting the constitutive curve of microcapsule self-healing materials provided in this invention can perform two-dimensional plane strain micro-damage-repair mechanical evolution behavior of microcapsule self-healing concrete under tensile load.

[0104] In specific implementation cases, the parameters used in numerical simulation and parameter analysis are shown in Table 1.

[0105] Table 1 Parameters of matrix and microcapsule

[0106]

[0107] Based on the above parameters, and using the method for predicting the constitutive curve of the microcapsule self-healing material provided in this embodiment of the invention, the following can be obtained: Figure 3 The diagram shows the stress-strain constitutive curves of concrete with and without microcapsules under tensile load in two-dimensional strain conditions.

[0108] The method for predicting the constitutive curve of a microcapsule self-healing material provided in this invention has the following beneficial effects: This invention can calculate the constitutive curves of conventional concrete without microcapsules, microcapsule self-healing concrete with strong healing agents, and microcapsule self-healing concrete with weak healing agents under tensile loads under plane strain conditions. In other words, it can establish the stress-strain curves of concrete materials with or without microcapsules under tensile loads, and perform the two-dimensional plane strain micro-damage-repair mechanical evolution behavior of microcapsule self-healing concrete under tensile loads. Figure 3 The constitutive curves shown can directly reflect and predict the micromechanical model of the post-peak softening stage of concrete materials.

[0109] Figure 4 A schematic diagram of the structure of the device for predicting the constitutive curve of microcapsule self-healing materials provided in an embodiment of the present invention is shown, as follows. Figure 4 As shown, the device includes:

[0110] Module 1 is used to determine whether the self-healing concrete material contains microcapsules;

[0111] The first constitutive curve module 2 is used to calculate the constitutive curve of conventional concrete material under tensile load when the self-healing concrete material does not contain microcapsules and the self-healing concrete material is conventional concrete material.

[0112] The second constitutive curve module 3 is used to calculate the constitutive curve of the self-healing concrete material containing microcapsules with strong healing agent under tensile load when the fracture load of the repaired microcrack is greater than or equal to the original fracture load of the microcrack in the self-healing concrete material without microcapsules.

[0113] The third constitutive curve module 4 is used to calculate the constitutive curve of the self-healing concrete material containing microcapsules with weak healing agent under tensile load when the fracture load of the repaired microcrack is less than the original fracture load of the microcrack in the self-healing concrete material without microcapsules.

[0114] Preferably, the formula for calculating the constitutive curve of conventional concrete under tensile load under plane strain conditions is:

[0115] Formula for linear elastic stage:

[0116] Nonlinear stage formula:

[0117] Stress drop stage formula:

[0118] Formula for the strain softening stage:

[0119]

[0120] Where ε represents the strain of the concrete specimen, σ represents the stress of the concrete specimen, ν represents the Poisson's ratio of the concrete specimen, A represents the area of ​​the concrete specimen, E represents the initial elastic modulus of the concrete, N represents the number of microcracks in the concrete specimen, a0 represents the initial radius of the microcracks, and a u a represents the radius of the microcrack after its first expansion. s This represents the radius after the second microcrack is activated and propagates.

[0121] Preferably, the formula for calculating the constitutive curve of self-healing concrete material containing microcapsules with strong healing agent under tensile load under plane strain conditions is:

[0122] Formula for linear elastic stage:

[0123] Nonlinear stage formula:

[0124] Stress drop stage formula:

[0125] Formula for the strain softening stage:

[0126]

[0127] Where ε represents the strain of the concrete specimen, σ represents the stress of the concrete specimen, ν represents the Poisson's ratio of the concrete specimen, A represents the area of ​​the concrete specimen, E represents the initial elastic modulus of the concrete, N represents the number of microcracks in the concrete specimen, a0 represents the initial radius of the microcracks, and α h a represents the radius of the repaired microcrack. u This represents the radius of the microcrack after its first expansion.

[0128] Preferably, the formula for calculating the constitutive curve of self-healing concrete material containing microcapsules of weak healing agent under tensile load under plane strain conditions is:

[0129] Formula for linear elastic stage:

[0130] Nonlinear stage formula:

[0131] Stress drop stage formula:

[0132] Formula for the strain softening stage:

[0133]

[0134] Where ε represents the strain of the concrete specimen, σ represents the stress of the concrete specimen, ν represents the Poisson's ratio of the concrete specimen, A represents the area of ​​the concrete specimen, E represents the initial elastic modulus of the concrete, N represents the number of microcracks in the concrete specimen, a0 represents the initial radius of the microcracks, and α h a represents the radius of the repaired microcrack. u This represents the radius of the microcrack after its first expansion.

[0135] Compared with the prior art, the beneficial effects of the device for predicting the constitutive curve of a microcapsule self-healing material provided in this embodiment of the invention are the same as the beneficial effects of the method for predicting the constitutive curve of a microcapsule self-healing material described in the above technical solution, and will not be repeated here.

[0136] The present invention also provides an electronic device, including a bus, a transceiver, a memory, a processor, and a computer program stored in the memory and executable on the processor. The transceiver, the memory, and the processor are connected via the bus. When the computer program is executed by the processor, it implements the steps in the method for predicting the constitutive curve of a microcapsule self-healing material as described above.

[0137] Compared with the prior art, the beneficial effects of the electronic device provided in the embodiments of the present invention are the same as the beneficial effects of the method for predicting the constitutive curve of a microcapsule self-healing material described in the above technical solution, and will not be repeated here.

[0138] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps in the method for predicting the constitutive curve of a microcapsule self-healing material as described above.

[0139] Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the embodiments of the present invention are the same as the beneficial effects of the method for predicting the constitutive curve of a microcapsule self-healing material described in the above technical solution, and will not be repeated here.

[0140] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for predicting the constitutive curve of a microcapsule self-healing material, characterized in that, include: Determine whether self-healing concrete materials contain microcapsules; If not, then the self-healing concrete material is a conventional concrete material, and the constitutive curve of the conventional concrete material under tensile load under plane strain conditions is calculated. The formula for calculating the constitutive curve of conventional concrete under tensile load under plane strain conditions is: Linear elastic stage formula: ; Non-linear stage formula: ; Stress drop phase formula: ; Formula for the strain softening stage: ； in, Indicates the strain of the concrete specimen. This indicates the stress in the concrete sample. The value represents Poisson's ratio of the concrete sample, A represents the area of ​​the concrete sample, E represents the initial elastic modulus of the concrete, and N represents the number of microcracks in the concrete sample. This represents the initial radius of the microcrack. This represents the radius of the microcrack after its first expansion. This represents the radius after the second microcrack is activated and propagates. This represents the spatial dip angle at the interface between unrepaired and repaired microcracks in the nonlinear stage. This represents the spatial dip angle at the boundary between unrepaired and repaired microcracks during the stress drop phase. This indicates the spatial dip angle at the interface between unrepaired and repaired microcracks during the strain softening stage. If so, determine the fracture load of the repaired microcrack. If the fracture load of the repaired microcrack is greater than or equal to the original fracture load of the microcrack in the self-healing concrete material without microcapsules, then the self-healing concrete material is a self-healing concrete material with microcapsules containing a strong healing agent. Calculate the constitutive curve of the self-healing concrete material with microcapsules containing a strong healing agent under tensile load under plane strain conditions. If the fracture load of the repaired microcrack is less than the original fracture load of the microcrack in the self-healing concrete material without microcapsules, then the self-healing concrete material is a self-healing concrete material with microcapsules containing a weak healing agent. Calculate the constitutive curve of the self-healing concrete material with microcapsules containing a weak healing agent under tensile load under plane strain conditions. If the repaired microcrack fracture load is greater than or equal to the original fracture load of the microcrack in the self-healing concrete material without microcapsules, then the self-healing concrete material is a self-healing concrete material containing microcapsules with a strong healing agent; if the repaired microcrack fracture load is less than the original fracture load of the microcrack in the self-healing concrete material without microcapsules, then the self-healing concrete material is a self-healing concrete material containing microcapsules with a weak healing agent, including: If then the repaired microcrack fracture load is greater than or equal to the microcapsule-free The original fracture load of microcracks in self-healing concrete materials, wherein the self-healing concrete material is a self-healing concrete material containing microcapsules with a strong healing agent. wherein , , This represents the original fracture load of microcracks in self-healing concrete materials without microcapsules. Indicates the fracture toughness of unrepaired microcracks. This indicates the spatial dip angle at the boundary between unrepaired and repaired microcracks. This represents the radius of the microcrack after its first propagation. This indicates the fracture load of the microcracks after repair. This indicates the fracture toughness of microcracks repaired after the healing agent contained in the microcapsules in self-healing concrete materials has cured. Indicates the radius of the microcrack after repair; like The repaired microcrack fracture load is less than the original fracture load of the microcrack in the self-healing concrete material without microcapsules, wherein the self-healing concrete material is a self-healing concrete material containing microcapsules with a weak healing agent. wherein , , This represents the original fracture load of microcracks in self-healing concrete materials without microcapsules. Indicates the fracture toughness of unrepaired microcracks. This indicates the spatial dip angle at the boundary between unrepaired and repaired microcracks. This represents the radius of the microcrack after its first propagation. This indicates the fracture load of the microcracks after repair. This indicates the fracture toughness of microcracks repaired after the healing agent contained in the microcapsules in self-healing concrete materials has cured. Indicates the radius of the microcrack after repair; The formula for calculating the constitutive curve of self-healing concrete material containing microcapsules with strong healing agent under tensile load under plane strain conditions is as follows: Linear elastic stage formula: ; Non-linear stage formula: ; Stress drop phase formula: ; Formula for the strain softening stage: ； in, Indicates the strain of the concrete specimen. This indicates the stress in the concrete sample. The value represents Poisson's ratio of the concrete sample, A represents the area of ​​the concrete sample, E represents the initial elastic modulus of the concrete, and N represents the number of microcracks in the concrete sample. This represents the initial radius of the microcrack. This indicates the radius of the microcrack after repair. This represents the radius of the microcrack after its first expansion; The formula for calculating the constitutive curve of self-healing concrete containing microcapsules with a weak healing agent under tensile load under plane strain conditions is as follows: Linear elastic stage formula: ; Non-linear stage formula: ; Stress drop phase formula: ; Formula for the strain softening stage: ； in, This represents the strain of the concrete specimen. This indicates the stress in the concrete sample. The value represents Poisson's ratio of the concrete sample, A represents the area of ​​the concrete sample, E represents the initial elastic modulus of the concrete, and N represents the number of microcracks in the concrete sample. This represents the initial radius of the microcrack. This indicates the radius of the microcrack after repair. This represents the radius of the microcrack after its first expansion.

2. A device for predicting the constitutive curve of a microcapsule self-healing material, characterized in that, include: The judgment module is used to determine whether the self-healing concrete material contains microcapsules; The first constitutive curve module is used to calculate the constitutive curve of conventional concrete material under tensile load under plane strain conditions when the self-healing concrete material does not contain microcapsules and the self-healing concrete material is conventional concrete material. The formula for calculating the constitutive curve of conventional concrete under tensile load under plane strain conditions is: Linear elastic stage formula: ; Non-linear stage formula: ; Stress drop phase formula: ; Formula for the strain softening stage: ； in, This represents the strain of the concrete specimen. This indicates the stress in the concrete sample. The value represents Poisson's ratio of the concrete sample, A represents the area of ​​the concrete sample, E represents the initial elastic modulus of the concrete, and N represents the number of microcracks in the concrete sample. This represents the initial radius of the microcrack. This represents the radius of the microcrack after its first expansion. This represents the radius after the second microcrack is activated and propagates. This represents the spatial dip angle at the interface between unrepaired and repaired microcracks in the nonlinear stage. This represents the spatial dip angle at the boundary between unrepaired and repaired microcracks during the stress drop phase (the dip angle is at its maximum at this point). This indicates the spatial dip angle at the interface between unrepaired and repaired microcracks during the strain softening stage. The second constitutive curve module is used to calculate the constitutive curve of the self-healing concrete material with strong healing agent microcapsules under tensile load under plane strain conditions when the fracture load of the repaired microcrack is greater than or equal to the original fracture load of the microcrack in the self-healing concrete material without microcapsules. The formula for calculating the constitutive curve of self-healing concrete containing microcapsules with a strong healing agent under tensile load under plane strain conditions is as follows: Linear elastic stage formula: ; Non-linear stage formula: ; Stress drop phase formula: ; Formula for the strain softening stage: ； in, This represents the strain of the concrete specimen. This indicates the stress in the concrete sample. The value represents Poisson's ratio of the concrete sample, A represents the area of ​​the concrete sample, E represents the initial elastic modulus of the concrete, and N represents the number of microcracks in the concrete sample. This represents the initial radius of the microcrack. This indicates the radius of the microcrack after repair. This represents the radius of the microcrack after its first expansion; The third constitutive curve module is used to calculate the constitutive curve of the self-healing concrete material with weak healing agent microcapsules under tensile load under plane strain conditions when the fracture load of the repaired microcrack is less than the original fracture load of the microcrack in the self-healing concrete material without microcapsules. The formula for calculating the constitutive curve of self-healing concrete containing microcapsules with a weak healing agent under tensile load under plane strain conditions is as follows: Linear elastic stage formula: ; Non-linear stage formula: ; Stress drop phase formula: ; Formula for the strain softening stage: ； in, Indicates the strain of the concrete specimen. This indicates the stress in the concrete sample. The value represents Poisson's ratio of the concrete sample, A represents the area of ​​the concrete sample, E represents the initial elastic modulus of the concrete, and N represents the number of microcracks in the concrete sample. This represents the initial radius of the microcrack. This indicates the radius of the microcrack after repair. This represents the radius of the microcrack after its first expansion.

3. An electronic device comprising a bus, a transceiver, a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the transceiver, the memory, and the processor are connected via the bus, characterized in that, When the computer program is executed by the processor, it implements the steps in the method for predicting the constitutive curve of a microcapsule self-healing material as described in claim 1.

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