【摘要】 采用金属材料微元屈服极限随机分布模型,计算出每次循环产生的微观塑性应变,并与用单调拉伸试验确定的材料真实断裂延性联系起来.用此方法即可估算材料的高周疲劳寿命.以40Cr钢为例比较了本方法计算与试验结果,两者误差小于30%.更多还原

【Abstract】 Randomly distributed models of micro-plastic strains were used to calculate the micro-plastic deformation produced at each cycle of the steel under high cycle fatigue test. The micro-plastic strains are determined by combining the true fracture ductility of the steel under test. For 40Cr steel, the errors of the fatigue life calculated with the proposed method are less than 30% compared with that determined by test.更多还原