Experimental device and experimental method for accelerated aging of polymer composite material

Abstract

The invention relates to the technical field of material performance testing, and discloses an experimental device and an experimental method for accelerated aging of a polymer composite material, the aging experiment of the polymer composite material under the influence of mechanical stress is realized by integrating a stress applying system and an environment simulation system on a box body, and the experimental device and the experimental method have the advantages that the test efficiency is improved; the coupling relation between different factors can be simulated, manpower and material resources can be saved, the motor and the ultraviolet radiation mechanism are arranged outside the box body, the motor and the ultraviolet radiation mechanism can be prevented from being influenced by the temperature control mechanism, the humidity control mechanism and the spraying mechanism, and the working efficiency is improved. In addition, due to the fact that the temperature control mechanism, the humidity control mechanism and the spraying mechanism can influence one another, the temperature control mechanism, the humidity control mechanism and the spraying mechanism are arranged in the box body in a unified mode and are adjusted at the same time through the data acquisition system arranged in the box body, and therefore the temperature control mechanism, the humidity control mechanism and the spraying mechanism can be adjusted at the same time. And the accuracy of the experiment is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of material property testing, and particularly to an experimental device and an experimental method for accelerating the aging of polymer composites. Background Art

[0002] At present, during the processing, storage, and use of materials, it is inevitable to come into contact with different environmental factors, resulting in the gradual deterioration of their physical and chemical properties and mechanical properties, that is, the aging phenomenon of materials. In order to simulate the aging of materials and detect the failure life of materials, artificial accelerated aging experiments are usually used to simulate and intensify the destructive effects of environmental factors on specimens.

[0003] During the service process of polymer composites, in some cases, they will also be subjected to external mechanical stress, and their aging behavior, failure model, etc. are different from those under non-stress conditions. Therefore, when conducting aging experiments on polymer composites, the influence of mechanical stress also needs to be considered. However, in order to avoid the influence of the environmental simulation system on the stress application system and thus affect the accuracy of the experimental results, the existing experimental devices usually design the mechanical stress as an independent and constant load module and then put it into the environmental test chamber to conduct experiments. For example, rubber is compressed to a fixed deformation by a splint and then put into a damp and hot test chamber to conduct a compression stress-damp and hot coupling environment experiment to complete the performance prediction of functional materials under a multi-factor coupling environment. As a result, if it is necessary to conduct environmental experiments on equipment polymer materials under multi-factor coupling, usually two or more experimental devices are required to complete the relevant experiments, which not only consumes manpower and material resources but also cannot simulate the coupling relationship between different factors, which is not conducive to deeply understanding the performance evolution and failure mechanism of materials. Summary of the Invention

[0004] The purpose of the present invention is to provide an experimental device and an experimental method for accelerating the aging of polymer composites, which can not only reduce the influence of the environmental simulation system on the stress application system, realize the aging experiment of polymer composites under the influence of mechanical stress, simulate the coupling relationship between different factors, but also save manpower and material resources.

[0005] To achieve the above object, the present invention provides an experimental device for accelerating the aging of polymer composites, comprising: a box body, a stress application system, an environment simulation system, and a data acquisition system; the interior of the box body is hollow, the top surface of the box body has a communication hole, and an irradiation window is further provided on the side surface of the box body; the stress application system includes a motor, a first clamping member, and a second clamping member, the motor is arranged outside the box body, one end of the first clamping member is connected to the output end of the motor, and the other end passes through the communication hole and extends into the interior of the box body, the second clamping member is arranged inside the box body and is correspondingly arranged with the first clamping member, the first clamping member and the second clamping member are used for clamping the experimental sample, and the irradiation window can be correspondingly arranged with the experimental sample; the environment simulation system includes an ultraviolet irradiation mechanism, a temperature control mechanism, a humidity control mechanism, and a spraying mechanism, the ultraviolet irradiation mechanism is arranged outside the box body and is correspondingly arranged with the irradiation window for irradiating ultraviolet light on the experimental sample, the temperature adjustment mechanism, the humidity control mechanism, and the spraying mechanism are arranged inside the box body; the data acquisition system is arranged inside the box body for real-time detecting the temperature, humidity, light intensity, and salt mist concentration inside the box body.

[0006] Optionally, the ultraviolet irradiation mechanism includes a lamp and a reflection panel, the reflection panel is in a parabolic shape and encloses to form a reflection groove, the notch of the reflection groove faces the experimental sample, the lamp is arranged in the reflection groove, and the distance from the notch of the reflection groove to the experimental sample is L, where 200mm ≤ L ≤ 300mm.

[0007] Optionally, the temperature control mechanism includes a fan, the top of the box body has an air inlet, the bottom of the box body has an air outlet, the fan is arranged at the air inlet, and the air outlet end of the fan is communicated with the air inlet, the air outlet end is used for inputting hot air into the air inlet, and the included angle between the air outlet end and the horizontal plane is M, where 15° ≤ M ≤ 45°.

[0008] Optionally, the humidity control mechanism includes a housing, a heating element, and a spraying element, the heating element and the spraying element are arranged inside the housing, the housing is arranged inside the box body, and one side of the housing facing the experimental sample has a spraying port, the spraying element is used for spraying a water solution, and the heating element is used for heating the water solution sprayed from the spraying element to evaporate and spray out from the spraying port.

[0009] Optionally, the spraying mechanism includes a water pump, a pipeline, and a spray head, the spray head is arranged inside the box body, the water pump is arranged outside the box body and is connected to the spray head through the pipeline, and the water pump is used for inputting a salt-containing liquid into the pipeline.

[0010] Optionally, a plurality of the stress application systems are included, and the first clamping members of the plurality of stress application systems are arranged at intervals along the length direction of the irradiation window.

[0011] Optionally, a control sample holder is further included, and the control sample holder is used to fix a control sample. The control sample is arranged inside the box body and is correspondingly arranged with the irradiation window.

[0012] Optionally, the data acquisition system is arranged on the control sample holder, and the data acquisition system includes an irradiation sensor, a blackboard thermometer, a humidity sensor, and a salt spray sensor.

[0013] Optionally, the stress application system includes a connecting rod. One end of the connecting rod is connected to the output end of the motor, and the other end passes through the communication hole to the inside of the box body and is connected to the first clamping member. A lubricating and sealing layer is provided on the outer peripheral side wall of the connecting rod.

[0014] To achieve the same purpose, the present invention also provides an experimental method for accelerating the aging of polymer composites. Using the experimental device for accelerating the aging of polymer composites as described above, the method includes the following steps:

[0015] Connect the top of the experimental sample to the first clamping member, and connect the bottom of the experimental sample to the second clamping member;

[0016] Start the data acquisition system, and the data acquisition system feeds back the temperature, humidity, light intensity, and salt spray concentration inside the box body;

[0017] Start the temperature adjustment mechanism, the humidity adjustment mechanism, the ultraviolet irradiation mechanism, and the spraying mechanism, so that the temperature, humidity, light intensity, and salt spray concentration inside the box body fed back by the data acquisition system reach preset parameters;

[0018] Start the motor to apply stress to the first clamping member;

[0019] When the elongation rate of the experimental sample reaches a predetermined value, record the failure life of the experimental sample;

[0020] Turn off the temperature adjustment mechanism, the humidity adjustment mechanism, the ultraviolet irradiation mechanism, the spraying mechanism, the motor, and the data acquisition system, and take out the experimental sample for the next experiment.

[0021] Compared with the prior art, an experimental device and an experimental method for accelerating the aging of polymer composites in an embodiment of the present invention have the following beneficial effects: By integrating a stress application system and an environment simulation system on a box body, the present application realizes the aging experiment of polymer composites under the influence of mechanical stress. While simulating the coupling relationship between different factors, it can also save manpower and material resources. In addition, since the motor and the ultraviolet irradiation mechanism are arranged outside the box body in the present application, the motor and the ultraviolet irradiation mechanism can be prevented from being affected by the temperature control mechanism, the humidity control mechanism and the spraying mechanism, thereby avoiding the situation of reduced service life and decreased accuracy of the motor and the ultraviolet irradiation mechanism. In addition, since the temperature control mechanism, the humidity control mechanism and the spraying mechanism can affect each other, they are uniformly arranged inside the box body and adjusted simultaneously by a data acquisition system also arranged inside the box body to ensure the accuracy of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the experimental device for accelerating the aging of polymer composites in an embodiment of the present invention;

[0023] Figure 2 is a front view of the experimental device for accelerating the aging of polymer composites in an embodiment of the present invention;

[0024] Figure 3 is an embodiment of the present invention Figure 2 is a cross-sectional view taken along the A-A direction;

[0025] Figure 4 is a side view of the experimental device for accelerating the aging of polymer composites in an embodiment of the present invention;

[0026] Figure 5 is an embodiment of the present invention Figure 4 is a cross-sectional view taken along the B-B direction;

[0027] Figure 6 is an embodiment of the present invention Figure 5 is an enlarged view of part C;

[0028] Figure 7 is an embodiment of the present invention Figure 5 is an enlarged view of part D;

[0029] Figure 8 is an embodiment of the present invention Figure 5 is an enlarged view of part E;

[0030] Figure 9 is a schematic internal structure diagram of the ultraviolet irradiation mechanism in an embodiment of the present invention;

[0031] Figure 10It is a schematic structural diagram of the stress application system in the embodiment of the present invention when performing a tensile load experiment;

[0032] Figure 11 is an embodiment of the present invention Figure 10 The enlarged view at position F;

[0033] Figure 12 It is a schematic structural diagram of the stress application system in the embodiment of the present invention when performing a compressive load experiment;

[0034] Figure 13 is an embodiment of the present invention Figure 12 The enlarged view at position G;

[0035] Figure 14 It is a schematic structural diagram of the stress application system in the embodiment of the present invention when performing a tensile load experiment;

[0036] Figure 15 is an embodiment of the present invention Figure 14 The enlarged view at position H;

[0037] Figure 16 It is a flowchart of the experimental method for accelerating the aging of polymer composites in the embodiment of the present invention.

[0038] In the figure, 1 is a box body; 12 is a partition; 121 is an air inlet; 122 is an air outlet; 13 is a drainage space; 2 is a stress application system; 21 is a motor; 22 is a first clamping member; 23 is a second clamping member; 24 is a connecting rod; 3 is an environmental simulation system; 31 is an ultraviolet irradiation mechanism; 311 is a lamp; 312 is a reflecting panel; 32 is a temperature control mechanism; 321 is a fan; 3211 is an air outlet end; 33 is a humidity control mechanism; 34 is a spraying mechanism; 4 is a data acquisition system; 5 is a control sample rack; 6 is an experimental sample; 7 is a control sample. Detailed implementation manners

[0039] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0041] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more, unless otherwise specifically defined.

[0042] As Figures 1-5 shown, an experimental device for accelerating the aging of a polymer composite material according to an embodiment of the present invention includes: a box body 1, a stress application system 2, an environment simulation system 3, and a data acquisition system 4; the interior of the box body 1 is hollow, the top surface of the box body 1 has a communication hole, and an irradiation window is further provided on the side surface of the box body 1; the stress application system 2 includes a motor 21, a first clamping member 22, and a second clamping member 23, the motor 21 is provided outside the box body 1 and located on the top surface of the box body 1, one end of the first clamping member 22 is connected to the output end of the motor 21, and the other end passes through the communication hole and extends into the interior of the box body 1, the second clamping member 23 is provided inside the box body 1 and is arranged corresponding to the first clamping member 22, the first clamping member 22 and the second clamping member 23 are used for clamping the experimental sample 6, and the irradiation window can be arranged corresponding to the experimental sample 6; the environment simulation system 3 includes an ultraviolet irradiation mechanism 31, a temperature control mechanism 32, a humidity control mechanism 33, and a spraying mechanism 34, the ultraviolet irradiation mechanism 31 is provided outside the box body 1 and is arranged corresponding to the irradiation window for irradiating ultraviolet light to the experimental sample 6, the temperature adjustment mechanism, the humidity control mechanism 33, and the spraying mechanism 34 are provided inside the box body 1, the temperature adjustment mechanism is used for adjusting the temperature inside the box body 1, the humidity adjustment device is used for adjusting the humidity inside the box body 1, and the spraying mechanism 34 is used for spraying salt mist to the experimental sample 6; the data acquisition system 4 is provided inside the box body 1 for real-time detecting the temperature, humidity, light intensity, and salt mist concentration inside the box body 1.

[0043] Based on the above solution, in the present application, the stress application system 2 and the environmental simulation system 3 are integrated on a box body 1 to implement the aging experiment of polymer composites under the influence of mechanical stress. While simulating the coupling relationship between different factors, it can also save manpower and material resources. Moreover, since the motor 21 and the ultraviolet irradiation mechanism 31 are arranged outside the box body 1 in the present application, it can avoid the influence of the temperature control mechanism 32, the humidity control mechanism 33 and the spraying mechanism 34 on the motor 21 and the ultraviolet irradiation mechanism 31, thereby avoiding the situation of reduced service life and decreased accuracy of the motor 21 and the ultraviolet irradiation mechanism 31. In addition, since the temperature control mechanism 32, the humidity control mechanism 33 and the spraying mechanism 34 can affect each other, they are uniformly arranged inside the box body 1 and are adjusted simultaneously by the data acquisition system 4 also arranged inside the box body 1 to ensure the accuracy of the experiment.

[0044] As Figure 3 and Figure 9 shown, in order to ensure that the irradiation uniformity is greater than or equal to 94% after the experimental sample 6 is irradiated, the ultraviolet irradiation mechanism 31 includes a lamp 311 and a reflection panel 312. The reflection panel 312 is in a parabolic shape and encloses to form a reflection groove. The notch of the reflection groove faces the experimental sample 6. The lamp 311 is arranged in the reflection groove. The distance from the notch of the reflection groove to the experimental sample 6 is L, and 200 mm ≤ L ≤ 300 mm. When 200 mm ≤ L ≤ 300 mm, the irradiation uniformity of the experimental sample in the box body 1 can be greater than or equal to 90%. When L is equal to 280 mm, the irradiation uniformity of the experimental sample in the box body 1 can reach 96%, which can better ensure that the experimental sample is in a uniform irradiation environment, better simulate the use environment of the sample, reduce errors, and improve the accuracy of experimental data. When the range of L is less than 200 mm or greater than 300 mm, the irradiation uniformity of the experimental sample in the box body 1 is less than 90%, and it is easy to occur that the irradiation intensity of some parts is too large or too small, and the aging degree of the experimental sample does not conform to the actual use situation, affecting the accuracy of experimental data.

[0045] In some embodiments, the lamp 311 is an ultraviolet lamp or a xenon lamp.

[0046] As Figure 5 and Figure 6As shown, to ensure uniform internal temperature of the box body 1, the temperature control mechanism 32 includes a blower 321. The top of the box body 1 has an air inlet 121, and the bottom of the box body 1 has an air outlet 122. The blower 321 is arranged at the air inlet 121, and the air outlet end 3211 of the blower 321 is communicated with the air inlet 121. The air outlet end 3211 is used to input hot air into the air inlet 121. The angle between the air outlet end 3211 and the horizontal plane is M, where 15° ≤ M ≤ 45°. By controlling the direction of the hot air, laminar flow can be avoided in the hot air circulation, thereby ensuring uniform internal temperature of the box body 1. Through the upward-inlet and downward-outlet air direction, it can ensure that the hot air can comprehensively purge the inside of the box body 1. It can be understood that when M is within the angle range of 15° ≤ M ≤ 45°, the hot air blows upward to achieve uniform hot air delivery at multiple experimental samples, making the temperature and humidity inside the box more uniform, reducing the temperature difference of the experimental samples inside the box, making the temperature and humidity of the experimental samples inside the box body 1 basically the same, enabling each experimental sample to conduct aging experiments under the same environmental conditions, and ensuring the accuracy of experimental data. Optimally, when M is equal to 30 degrees, the temperature and humidity error at multiple experimental samples can be reduced to 1.2. If M is less than 15° or greater than 45°, the temperature and humidity error of multiple experimental samples will be greater than 2, seriously affecting the experimental data.

[0047] As Figure 5 shown, to ensure uniform internal humidity of the box body 1, the humidity control mechanism 33 includes a housing, a heating element, and a spraying element. The heating element and the spraying element are arranged inside the housing. The housing is arranged inside the box body 1, and the side of the housing facing the experimental sample 6 has a spraying port. The spraying element is used to spray liquid, and the heating element is used to heat the liquid sprayed from the spraying element to evaporate and spray out from the spraying port, ensuring uniform internal humidity of the box body 1 by means of electric heating evaporation and humidification.

[0048] As Figure 5 shown, to facilitate the spraying operation, the spraying mechanism 34 includes a water pump, a pipeline, and a spray head. The spray head is arranged inside the box body 1, the water pump is arranged outside the box body 1, and is connected to the spray head through the pipeline. The water pump is used to input saline liquid into the pipeline, and spray salt mist on the experimental sample 6 through the spray head. Salt mist refers to a dispersion system composed of tiny saline droplets in the atmosphere.

[0049] As Figures 5-7As shown, in some embodiments, since the spraying mechanism 34, the temperature control mechanism 32 and the humidity mechanism will affect each other, when conducting experiments, in order to facilitate the control of the temperature, humidity and salt spray concentration inside the box 1, it is necessary to first start the spraying mechanism 34 to spray salt spray, and then start the temperature control mechanism 32 to cause hot air circulation inside the box 1, and the hot air drives the salt spray to be evenly distributed inside the box 1. Finally, start the humidity mechanism to adjust the humidity inside the box 1.

[0050] It should be emphasized that in order to avoid laminar flow when the hot air inside the box 1 circulates, resulting in excessive temperature and humidity deviation in different regions inside the box 1, it is necessary to control the direction of the hot air, that is, the angle between the air outlet end 3211 and the horizontal plane is M, and preferably the hot air speed is 1 - 3 m / s, and control the temperature deviation inside the box 1 within ±2 °C and the humidity deviation within ±2%.

[0051] In some embodiments, in order to avoid the ultraviolet irradiation mechanism 31 affecting the temperature control mechanism 32 and the humidity control mechanism 33, a partition 12 is provided inside the box 1. The partition 12 extends along the height direction of the box 1 and divides the interior of the box 1 into two chambers. One of the chambers is used to place the temperature control mechanism 32 and the humidity control mechanism 33, and the other chamber is used to place the first clamping member 22 and the second clamping member 23. The air inlet 121 and the air outlet 122 are both provided on the partition 12, and the fan 321 is provided above the humidity control mechanism 33. In this way, the fan 321 can also input the liquid evaporated by the humidity control mechanism 33 into the other chamber through the air inlet 121, thereby controlling the humidity of the other chamber.

[0052] On this basis, the air outlet end 3211 of the fan 321 is a louver mechanism and is provided at the air inlet 121 to facilitate adjusting the angle M between the air outlet end 3211 and the horizontal plane.

[0053] Furthermore, a drainage space 13 is left between the temperature control mechanism 32 and the bottom of the box 1. The drainage space 13 is correspondingly arranged with the air outlet 122, and the drainage space 13 is used to drain the liquid during the hot air circulation process.

[0054] As Figure 1 shown, in order to improve the detection efficiency, a plurality of the stress application systems 2 are included, and the first clamping members 22 of the plurality of stress application systems 2 are arranged at intervals along the length direction of the irradiation window.

[0055] As Figure 5 and Figure 8As shown, in order to ensure the accuracy of experimental data, a control sample rack 5 is further included. The control sample rack 5 is used to fix the control sample 7. The control sample 7 is arranged inside the box body 1 and is correspondingly arranged with the irradiation window.

[0056] Optionally, in order to ensure the accuracy of experimental data, the data acquisition system 4 is arranged on the control sample rack 5. The data acquisition system 4 includes an irradiation sensor, a blackboard thermometer, a humidity sensor, and a salt spray sensor.

[0057] As Figure 10 shown, in order to ensure the sealing performance of the box body 1, the stress application system 2 includes a connecting rod 24. One end of the connecting rod 24 is connected to the output end of the motor 21, and the other end passes through the communication hole to the inside of the box body 1 and is connected to the first clamping member 22. A lubricating sealing layer is provided on the outer peripheral side wall of the connecting rod 24 to ensure the sealing of the box body 1 through the lubricating sealing layer, and it can also prevent the connecting rod 24 from being worn during the movement process.

[0058] In some embodiments, the lubricating sealing layer is a fluorine-containing plastic.

[0059] In some embodiments, since the stress application system 2 needs to perform tensile load experiments, bending load experiments, and compressive load experiments on the experimental sample 6, the structures of the first clamping member 22 and the second clamping member 23 also need to be adjusted accordingly to ensure the accuracy of the experimental results;

[0060] Specifically, as Figure 10 and Figure 11 shown, when a tensile load experiment needs to be performed on the experimental sample 6, the clamping ends of the first clamping member 22 and the second clamping member 23 are wedge-shaped jigs. The experimental sample 6 is dumbbell-shaped or strip-shaped. The tensile load experiment is realized by the backward movement of the first clamping member 22 relative to the second clamping member 23. The wedge-shaped jig can ensure the stable clamping force of the first clamping member and the second clamping member 23 on the experimental sample 6 and is not easy to loosen;

[0061] As Figure 12 and Figure 13 shown, when a compressive load experiment needs to be performed on the experimental sample 6, the clamping ends of the first clamping member 22 and the second clamping member 23 are columnar. The experimental sample 6 is cylindrical, and one end can abut against the clamping end of the first clamping member 22, and the other end can abut against the clamping end of the second clamping member 23. The compressive load experiment is realized by the forward movement of the first clamping member 22 relative to the second clamping member 23;

[0062] As Figure 14 and Figure 15As shown, when a bending load experiment needs to be performed on the experimental sample 6, the clamping end of the first clamping member 22 is arc-shaped, the clamping end of the second clamping member 23 is groove-shaped and the notch is arranged facing the first clamping member 22. The experimental sample 6 is strip-shaped and is fixed to the top surface of the clamping end of the second clamping member 23. A bending load experiment is achieved by the relative movement of the first clamping member 22 towards the second clamping member 23. In some embodiments, in order to facilitate positioning the position of the experimental sample 6 and ensure that the clamping end of the first clamping member 22 can correspond to the center of the experimental sample 6, a scale is further provided on the second clamping member 23.

[0063] As Figure 16 shown, an experimental method for accelerating the aging of a polymer composite material according to an embodiment of the present invention uses the experimental device for accelerating the aging of a polymer composite material as described above, and includes the following steps:

[0064] Connect the top of the experimental sample 6 to the first clamping member 22, and connect the bottom of the experimental sample 6 to the second clamping member 23;

[0065] Start the data acquisition system 4, and the data acquisition system 4 feeds back the temperature, humidity, light intensity, and salt mist concentration inside the box body 1;

[0066] Start the temperature adjustment mechanism, the humidity adjustment mechanism, the ultraviolet irradiation mechanism 31, and the spraying mechanism 34, so that the temperature, humidity, light intensity, and salt mist concentration inside the box body 1 fed back by the data acquisition system 4 reach preset parameters;

[0067] Start the motor 21 to apply stress to the first clamping member 22;

[0068] When the elongation rate of the experimental sample 6 reaches a predetermined value, record the failure life of the experimental sample 6;

[0069] Turn off the temperature adjustment mechanism, the humidity adjustment mechanism, the ultraviolet irradiation mechanism 31, the spraying mechanism 34, the motor 21, and the data acquisition system 4, and take out the experimental sample 6 for the next experiment.

[0070] In this embodiment, before clamping the experimental sample 6 between the first clamping member 22 and the second clamping member 23, the experimental sample 6 is processed into a dumbbell shape or a strip shape to facilitate the tensile stress experiment.

[0071] In this example, before starting the temperature adjustment mechanism, a protection temperature value is set for the temperature adjustment mechanism in advance. The protection temperature value is set according to the material of the experimental sample 6. For example, it is set to 10-20°C below the glass transition temperature of the polymer material, or 30-100°C below the melting point. If the material of the experimental sample 6 is a cross-linked polymer material, since there is no glass transition temperature and melting point, it is set to below 100-200°C of the decomposition temperature.

[0072] In this embodiment, in order to ensure the accuracy of experimental data, the load applied by the stress application system 2 is 0-5000N, the displacement allowable range of the experimental sample 6 is controlled within 0-600mm, and the change error of the load applied by the stress application system 2 is less than or equal to ±0.5%.

[0073] In summary, the embodiment of the present invention provides an experimental device and an experimental method for accelerating the aging of polymer composites. By integrating the stress application system 2 and the environmental simulation system 3 on a box body 1, the aging experiment of polymer composites under the influence of mechanical stress can be realized. While simulating the coupling relationship between different factors, it can also save manpower and material resources. And since the motor 21 and the ultraviolet irradiation mechanism 31 of this application are arranged outside the box body 1, it can avoid the influence of the temperature control mechanism 32, the humidity control mechanism 33 and the spraying mechanism 34 on the motor 21 and the ultraviolet irradiation mechanism 31, thereby avoiding the situation of reduced lifespan and decreased accuracy of the motor 21 and the ultraviolet irradiation mechanism 31. In addition, since the temperature control mechanism 32, the humidity control mechanism 33 and the spraying mechanism 34 can affect each other, they are uniformly arranged inside the box body 1 and are adjusted simultaneously by the data acquisition system 4 also arranged inside the box body 1 to ensure the accuracy of the experiment.

[0074] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An experimental device for accelerated aging of polymer composite materials, characterized in that: include: Box, stress application system, environmental simulation system and data acquisition system; The interior of the box is hollow, the top surface of the box has a communicating hole, and the side of the box is also provided with an irradiation window; The stress applying system comprises a motor, a first clamping member and a second clamping member, wherein the motor is arranged outside the box, one end of the first clamping member is connected to the output end of the motor, and the other end of the first clamping member passes through the connecting hole and extends into the inside of the box, the second clamping member is arranged inside the box and is arranged corresponding to the first clamping member, the first clamping member and the second clamping member are used to clamp the experimental sample, and the irradiation window can be arranged corresponding to the experimental sample; The environmental simulation system comprises an ultraviolet irradiation mechanism, a temperature control mechanism, a humidity control mechanism and a spray mechanism, wherein the ultraviolet irradiation mechanism is arranged outside the box and is arranged corresponding to the irradiation window, and is used to irradiate ultraviolet light to the experimental sample, and the temperature adjustment mechanism, the humidity control mechanism and the spray mechanism are arranged inside the box; The data acquisition system is arranged inside the box and is used for real-time detection of the temperature, humidity, light intensity and salt spray concentration inside the box.

2. The experimental device for accelerated aging of polymer composite materials according to claim 1, characterized in that: The ultraviolet irradiation mechanism includes a lamp and a reflective panel, the reflective panel is parabolic in shape and encloses a reflective groove, the groove opening of the reflective groove is arranged toward the experimental sample, the lamp is arranged in the reflective groove, and the distance from the groove opening of the reflective groove to the experimental sample is L, 200mm≤L≤300mm.

3. The experimental device for accelerated aging of polymer composite materials according to claim 1, characterized in that: The temperature control mechanism includes a fan, the top of the box body is provided with an air inlet, the bottom of the box body is provided with an air outlet, the fan is arranged at the air inlet, and the air outlet end of the fan is connected with the air inlet, the air outlet end is used to input hot air into the air inlet, and the angle between the air outlet end and the horizontal plane is M, 15°≤M≤45°.

4. The experimental device for accelerated aging of polymer composite materials according to claim 1, characterized in that: The humidity control mechanism includes a shell, a heating element and a spray element. The heating element and the spray element are arranged inside the shell. The shell is arranged inside the box, and the shell has a spray port on the side facing the experimental sample. The spray element is used to spray water, and the heating element is used to heat the water sprayed from the spray element to evaporate and spray it from the spray port.

5. The experimental device for accelerated aging of polymer composite materials according to claim 1, characterized in that: The spray mechanism comprises a water pump, a pipeline and a spray head. The spray head is arranged inside the box body, and the water pump is arranged outside the box body and connected to the spray head through the pipeline. The water pump is used to input salt-containing liquid into the pipeline.

6. The experimental device for accelerated aging of polymer composite materials according to claim 1, characterized in that: A plurality of the stress applying systems are included, and the first clamping members of the plurality of the stress applying systems are arranged at intervals along the length direction of the irradiation window.

7. The experimental device for accelerated aging of polymer composite materials according to claim 1, characterized in that: It also includes a control sample rack, which is used to fix the control sample. The control sample is arranged inside the box and corresponds to the irradiation window.

8. The experimental device for accelerated aging of polymer composite materials according to claim 7, characterized in that: The data acquisition system is arranged on the control sample rack, and the data acquisition system comprises an irradiation sensor, a blackboard thermometer, a humidity sensor and a salt spray sensor.

9. The experimental device for accelerated aging of polymer composite materials according to claim 1, characterized in that: The stress application system includes a connecting rod, one end of which is connected to the output end of the motor, and the other end passes through the connecting hole to the inside of the box and is connected to the first clamping member. The outer peripheral side wall of the connecting rod is provided with a lubricating sealing layer.

10. An experimental method for accelerated aging of polymer composite materials, characterized in that: The experimental device for accelerated aging of polymer composite materials as claimed in any one of claims 1 to 9 comprises the following steps: Connecting the top of the experimental sample to the first clamping member, and connecting the bottom of the experimental sample to the second clamping member; The data acquisition system is started, and the data acquisition system provides feedback of the temperature, humidity, light intensity and salt spray concentration inside the box; Starting the temperature regulating mechanism, the humidity regulating mechanism, the ultraviolet irradiation mechanism and the spraying mechanism, so that the temperature, humidity, light intensity and salt spray concentration inside the box fed back by the data acquisition system reach preset parameters; Starting the motor to apply stress to the first clamping member; When the elongation of the test sample reaches a predetermined value, recording the failure life of the test sample; The temperature regulating mechanism, the humidity regulating mechanism, the ultraviolet irradiation mechanism, the spraying mechanism, the motor and the data acquisition system are turned off, and the experimental samples are taken out to carry out the next experiment.

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