Low-cycle fatigue life analysis method for generator structure
A low-cycle fatigue and life analysis technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problem that the formula calculation of structural life does not realize process analysis, cannot effectively deal with multi-axial stress problems, and the results are not obvious enough In order to achieve the effect of reducing design and development costs, realizing standardization and simple operation
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[0040] Such as figure 1 As shown, it is a finite element numerical simulation model of a cantilever beam structure. The specific size parameters are 120mm in length, 20mm in section width, 20mm in height, and a fillet radius of 10mm. Copper material is used, and the applied load is an alternating force of ±5kN at the free end. Take it as the analysis object of this embodiment.
[0041] Such as image 3 As shown, firstly, the stress and strain of the cantilever beam under 5kN and -5kN loads are obtained by finite element elastoplastic analysis (step 1). Then import the stress and strain results into the self-edited MATLAB program (step 2-3) for low-cycle fatigue analysis, and calculate the fatigue life of the cantilever beam finite element model at each node. Finally, the fatigue life at each node is loaded on each node as a temperature load and displayed (step 4).
[0042] The described low cycle fatigue life analysis method for generator structure is:
[0043] Step 1: Est...
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