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根据四方车辆研究所实测的SA8级程序载荷谱,用局部应力-应变法估算了转8A侧架、摇枕的疲劳裂纹形成寿命,用断裂力学方法估算了裂纹扩展寿命,对恒幅脉动载荷作用下估算出的侧架裂纹形成寿命进行了实验验证。并对局部应力-应变法估算寿命的有关问题作了进一步研讨。
According to the SA8-class program load spectrum measured by Sifang Vehicle Research Institute, fatigue life of Zhuan 8A side frame and bolster was estimated by local stress-strain method. The crack propagation life was estimated by fracture mechanics method, Under the estimated side frame crack formation life of the experimental verification. And the local stress-strain method to estimate the life-related issues for further study.