13 results about "Stress–strain analysis" patented technology

The invention relates to the field of vortex plate stress analysis, in particular to a method for accurately analyzing stress and strain of a vortex plate. The method comprises the following steps: 1, establishing a vortex plate three-dimensional model; 2, performing transient solution on the fluid domain; 3, analyzing a static structure; 4, calculating steady-state heat; and 5, calculating an inertial load, and completing comprehensive stress-strain analysis of one-way coupling. According to the method, a CFD method (computational fluid mechanics) is combined with commercial software, a VLES turbulence model is innovatively introduced, the proportion of turbulence modeling and turbulence analysis can be adaptively adjusted through a resolution control function, the influence of grids on a calculation result can be weakened on the premise of ensuring calculation precision, and calculation resources are greatly saved. According to the method, the flow field distribution of the vortex compression cavity is calculated according to the temperature and the pressure of the vortex tooth surface, so that the load data at the fluid-solid coupling interface is obtained, and compared with a traditional simplified method, the temperature and the pressure of the vortex tooth surface calculated by the CFD method are more consistent with actual conditions, so that the structural strength analysis result is more reliable.

This invention discloses a device for determining the compressive plasticity stage of recycled concrete based on acoustic emission and stress-strain analysis. The device includes: applying axial compressive loads to recycled concrete specimens under different working conditions, simultaneously measuring their acoustic emission signals and compressive stress-strain curves, and outputting an Excel spreadsheet containing the time, cumulative acoustic emission energy value, acoustic emission b-value, stress, and strain. A GUI interface is constructed using MATLAB, creating execution buttons, input boxes, result display areas, and graphical display areas. Callback functions for file selection and monitoring are defined based on the GUI interface. Acoustic emission, b-value, stress, and strain data are extracted from the specified Excel worksheet and interpolated. Functions are called to detect yield strength and the time and strain of complete failure, and the results are output. This invention can quickly detect the plasticity stage of materials by processing acoustic emission and stress-strain data, making data processing and result display more intuitive.

The invention discloses a method for optimizing the random vibration fatigue life of a laminated welding spot, which comprises the following steps of: establishing a finite element simulation analysis model of the laminated welding spot based on ANSYA software, performing random vibration mode analysis and stress-strain analysis on the model, predicting the fatigue life of the laminated welding spot, determining factors and level values which influence the life of the laminated welding spot, and optimizing the fatigue life of the laminated welding spot. 9 groups of different parameter level combinations are designed by using an orthogonal test method, the vibration fatigue life of the 9 groups of laminated welding spots is predicted, range analysis is carried out, the optimal level combination with the maximum life is obtained, simulation verification is carried out, and the optimization method is simple and obvious in effect, and has certain reference significance for fatigue life optimization of other types of welding spots.

The invention provides a device and a method for analyzing stress and strain of a material at an ultrahigh strain rate, and relates to the technical field of material analysis at the ultrahigh strain rate. The material stress-strain analysis equipment under the ultrahigh strain rate comprises a transmitting tube, an impact block, a fixed bracket, a bearing base and a to-be-tested sample, an impact channel is formed in the fixing support, the bearing base is fixedly arranged at the impact channel of the fixing support, and a speed detector used for monitoring the flight speed of the impact block is arranged on the side, away from the bearing base, of the fixing support. The impact block is arranged in the launching tube, the impact block can penetrate through the impact channel to impact one side of the bearing base, and a plurality of samples to be tested are arranged on the other side of the bearing base; and a DISAR probe is arranged on the to-be-tested sample. The technical effect that more material dynamic parameters can be obtained through a single test is achieved.

The application provides a surface flaw analysis method combined with metal material fatigue life prediction, comprising: performing mesh optimization and refinement processing on an initial three-dimensional model, performing fine reconstruction on a local area, and obtaining a three-dimensional geometric model of a metal material surface, the three-dimensional geometric model containing surface flaw information of a microscale; performing regional division on the three-dimensional geometric model, identifying and extracting a surface flaw region, performing edge detection on the surface flaw region, and determining accurate geometric contours and spatial position information of the flaw; using finite element analysis software, importing the three-dimensional geometric model of the metal material and a flaw mathematical description model, setting material properties, boundary conditions and load working conditions, and establishing a finite element analysis model containing micro flaws; performing stress and strain analysis on the finite element analysis model of the micro flaw, calculating stress distribution and stress concentration coefficients around the flaw, and using fracture mechanics theory to evaluate the influence of the flaw on fatigue crack initiation and propagation.

A method for analyzing pipeline stress sensitivity under landslide action comprises the following steps: establishing a pipeline constitutive model by applying a Ramberg-Osgood model; assigning the pipeline constitutive model and pipeline performance parameters to a pipe unit of finite element software for mechanical stress and strain analysis to establish the pipeline model; determining soil physical and mechanical indicators according to soil type; defining three soil springs to simulate pipe-soil interaction in three directions of a buried pipeline, and calculating pipe-soil interaction parameters of the buried pipeline in combination with the soil physical and mechanical indicators, the outer diameter of the buried pipeline, and the burial depth; assigning the pipe-soil interaction parameters to a soil spring unit in the finite element software to establish a soil spring model; establishing a finite element model for stress analysis of the buried pipeline under landslide action by applying the pipe unit; simulating the stress distribution and maximum stress of the buried pipeline under landslide action; and varying the model parameters to obtain the influence of different factors on the stress distribution of the buried pipeline under landslide action and the maximum stress, thereby accurately analyzing the pipe-soil interaction under landslide action.

The present application relates to the technical field of building material detection, in particular to a color stone metal tile strength detection method and system, comprising: obtaining surface reflection light distribution data and internal structure stress distribution data of the sample to be detected, analyzing surface coating uniformity and micro-morphology characteristics to generate surface quality evaluation data set; fusing surface data and internal stress data, constructing a comprehensive stress-strain analysis model, and calculating the theoretical deformation parameters and the limit bearing threshold of the sample under the preset load; according to the above calculation results, accurately guiding the loading position, force value and process in the subsequent physical strength detection. The method combines the surface microstate and internal structure information to carry out predictive modeling, realizing the transformation of the detection process from unified loading, post-judgment to predictive guidance and intelligent loading.

The invention belongs to the technical field of structural safety detection, and discloses a concrete box girder bridge section stiffness distribution updating method which comprises the following steps: (1) acquiring strain data required for updating the section stiffness of a box girder; (2) establishing a stress-strain analysis theory; (3) discretizing the cross section of the box girder to establish a numerical model; and (4) updating the rigidity distribution of the cross section of the box girder. Based on the problems that the rigidity distribution of the cross section of the box girder bridge is uneven and the stress-strain distribution of the cross section is complex, a generalized girder theory and a model updating method are used for inverting the rigidity distribution condition in the cross section of the box girder, and the stress-strain in the cross section of the box girder when the rigidity is uneven is accurately calculated. According to the method, a rigidity updating strategy taking the inertia moment and the neutral axis as constraint conditions is applied, the section rigidity distribution can be well updated, and the rigidity updating calculation efficiency is improved. Meanwhile, the method considers the special deformation mode of the cross section of the box girder, obtains the proportion of various deformation modes in the total stress, and is more beneficial to the evaluation of the stress condition.

The invention discloses a stress-strain analysis method for a rib-wound fuel rod under a large temperature gradient, and relates to a nuclear industry technology. The method comprises the following steps: firstly, establishing a geometric model of rib-wound fuel rods, and replacing adjacent rib-wound fuel rods with fixing plates made of the same material; then, based on Ansys Workbench, a table insertion method is adopted to define material physical relations under different temperatures or irradiation conditions, and a contact relation between the cladding and the fixed plate is set; adopting an APDL function to edit cladding surface heat transfer boundary conditions, and setting the same heat transfer boundary and constraint conditions for the fixed plate; and finally, solving the temperature field and stress strain of the rib-wound fuel rod and the fixed plate based on a finite element method. According to the method, the elastoplasticity problem that the rib-wound fuel rod material is influenced by irradiation and high temperature at a large temperature gradient is considered, and the simulation model is reasonably simplified according to the mutual contact characteristic between the rib-wound fuel rods; and on the basis of saving computing resources, deformation and stress distribution of the rib-wound fuel rod in extreme environments such as high temperature and high pressure can be simulated more truly.

The application provides a stress-strain analysis method of an anisotropic material, characterized in that the method comprises the following steps: S1, establishing a geometric model of the anisotropic material, and performing mesh division on the geometric model to obtain an isolated mesh model; S2, processing each mesh unit in the isolated mesh model to obtain a directional vector of each mesh unit; S3, creating a discrete field by using the directional vector of each mesh unit of the isolated mesh model obtained in step S2; and S4, performing material coordinate paving on each mesh unit of the isolated mesh model by using the discrete field.

The present invention discloses a structural stress and strain analysis method and device based on artificial intelligence. The method includes: receiving input stress sensing information, structural drawings and monitoring images and extracting corresponding basic feature information; extracting corresponding comparative feature information from a three-dimensional structural model; judging whether the basic feature information and the comparative feature information match according to preset matching judgment rules; if they do not match, inputting the basic feature information and the comparative feature information into a preset artificial intelligence model for correlation analysis to obtain corresponding correlation analysis results; and obtaining strain measures corresponding to the correlation analysis results from a preset stress and strain database. During the structural construction process, the above method can combine actual working conditions and analyze structural deformation during the construction process through artificial intelligence to obtain strain measures and adjust the construction structure, and can efficiently perform structural stress and strain analysis when the building structure is deformed.

The present application relates to a dam simulation test platform stability analysis method under the combined action of multiple loads, comprising: modeling the steel cable used for the test platform binding fixation, analyzing the stress-strain of the steel cable; obtaining the stability boundary conditions of the structural members of the dam simulation test platform through analysis; analyzing the stability of the structural members of the test platform under large temperature difference conditions; analyzing the stability of the dam simulation test platform under the action of wind load; analyzing the load of the dam simulation test platform under the impact of sediment flow; analyzing the stress-strain of the dam simulation test platform under the combined load, and judging the stability of the dam simulation test platform. The present application calculates the sediment flow impact, wind load and snow load of the dam simulation test platform, analyzes the stress field and strain distribution of the dam simulation test platform under the combined load, judges the stability of the dam simulation test platform, and ensures the structural safety and stability of the test platform under extreme weather conditions.

The invention provides a 3D printing method and system for an osteochondral stent. The method comprises the following steps: collecting three-dimensional point cloud data of an osteochondral defect part; reconstructing a three-dimensional model of the defect part based on the point cloud data, and performing stress-strain analysis on the model; according to a stress distribution result, establishing a porosity dynamic adjustment model to adjust pore parameters; and generating a printing path based on the target pore parameters and the three-dimensional model, and sequentially printing the subchondral bone layer, the transition layer and the scaffold cartilage layer. Model reconstruction and stress analysis are driven through medical image data, dynamic calibration of pore parameters is realized in combination with a structure optimization algorithm, multi-material printing and multi-stage crosslinking are utilized, the pore parameters are adjusted through a porosity dynamic adjustment model, and stent failure caused by stress concentration is avoided; the gradient printing and cross-linking synergistically enhance the stability of the scaffold and the slow release ability of bioactive ions, so that the cell migration efficiency, the collagen deposition quality and the osteochondral interface integration strength are remarkably improved.