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FV520B钢低周疲劳循环特性及有限元分析
Low Cycle Fatigue Characteristics and Finite Element Analysis of FV520B Steel
投稿时间: 2017-03-08  最后修改时间: 2017-05-05
DOI:
中文关键词:  FV520B钢  低周疲劳  循环特性  有限元模拟  寿命预测
英文关键词:FV520B steel  low cycle fatigue  cyclic properties  finite element simulation  life prediction
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
金丹 沈阳化工大学 jindan76@163.com 
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中文摘要:
      针对FV520B钢进行了不同应变幅值下的单轴低周疲劳试验,分析了循环特性的幅值相关性,并采用有限元方法进行了模拟计算。实验结果表明:该材料在小应变幅值下,仅在循环初期表现出轻微的循环硬化,随即达到稳定状态,各应变幅值下失效前的循环软化现象并不明显;塑性变形随总应变幅的增加而显著增加。利用ANSYS软件进行模拟计算,模拟结果和试验结果吻合较好。最后,结合模拟结果,采用Coffin-Manson方程对材料进行疲劳寿命预测,预测结果均位于2倍分散带内。
英文摘要:
      A series of low cycle fatigue tests were carried for FV520B steel. The cyclic properties of different strain amplitudes were compared and the simulations were done by ANSYS software. The test results show that the slight cyclic hardening is observed for the initial cycles and the stable hysteresis loop is gained under small strain amplitude. The cyclic softening phenomenon is not significant for all strain amplitudes before failure. The plastic deformation increases with the increase of the total strain amplitude.The simulations were conducted by ANSYS software and the simulations are well agreed with the test results. The fatigue lives were predicted by Coffin-Manson equation based on the simulations and the predictions are in two scatter band.
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