Finite element simulation-based wheel-track contact cyclic loading-unloading simulation analysis method
A simulation analysis and finite element technology, applied in the theoretical and practical computer simulation field of wheel-rail contact, which can solve the problems such as the lack of a description of the implementation method of the wheel-rail circulation action, the lack of consideration of the influence of boundary effects, and the difficulty in eliminating errors.
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[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and examples.
[0023] The invention provides a wheel-track contact cycle loading-unloading simulation analysis method based on finite element simulation, and its operation flow is as follows figure 1 As shown, the specific steps are as follows:
[0024] (1) Using the finite element software ABAQUS, establish a dog-bone type smooth cylindrical sample model, the diameter of the cylinder is 14mm, and the length of the cylinder is 25.4mm, such as figure 2 As shown in (a); the vertical stress and strain of the internal unit of the cylinder are monitored, and the real stress-strain curve is drawn. The vertical strain contours of multiple loadings are shown in 2(b).
[0025] (2) Carry out uniaxial tension-compression cycle test simulation, and correct the nonlinear hardening parameters of the material according to the laboratory test results and the Chaboche model. The ke...
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Abstract
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