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张江玉,王伟,金丹*.FV520B钢低周疲劳循环特性及有限元分析[J].实验力学,2018,33(4):649~654
FV520B钢低周疲劳循环特性及有限元分析
On the low cycle fatigue cyclic 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:10.7520/1001-4888-17-052
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:国家自然科学基金资助项目(No.11102119);辽宁省自科基金项目(No.201602586)
作者单位
张江玉 沈阳化工大学 能源与动力工程学院, 沈阳 110142 
王伟 沈阳化工大学 能源与动力工程学院, 沈阳 110142 
金丹* 沈阳化工大学 能源与动力工程学院, 沈阳 110142 
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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。试验结果表明:FV520B钢在小应变幅值下,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 uniaxial low-cycle fatigue experiments were carried out for FV520B steel under different strain amplitudes. The amplitude correlation of cyclic characteristics was analyzed, and finite element method was adopted for simulation calculation. Experimental results show that under small strain amplitude condition, this material presents slight cyclic hardening only at the beginning of cycle and then reaches stable state, and the cyclic softening phenomenon before failure under each strain amplitude value is not obvious. The plastic deformation increases significantly with the increase of the total strain amplitude. ANSYS software was used for simulation calculation. Simulation results are in good agreement with the experimental ones. Finally, according to simulation results, fatigue life prediction of this material was carried out by using Coffin-Manson equation. Prediction result is located in the two times dispersion zone.
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