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本文介绍了用控制应变幅的低周疲劳试验测定材料的损伤因子临界值D_c,试样用45号钢制作。发现损伤因子临界值D_c介于拉伸和扭转试验值之间,且与纯剪切的试验结果较为接近。
In this paper, the critical value D_c of the damage factor of the material is measured by low-cycle fatigue test with controlled strain amplitude. The sample is made of 45 steel. It is found that the critical value of damage factor D_c is between the tensile and torsion test values and is close to the pure shear test results.