奥氏体不锈钢 304 在轴向-扭转载荷下蠕变-疲劳行为的统一粘塑结构模型

IF 1.8 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Xiaohui Chen, Lin Zhu, Xiaodong Cui, Xu Zhao
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引用次数: 0

摘要

基于 Abdel-Karim 和 Ohno 模型框架,开发了统一粘塑性构造模型 (UVCM),以模拟奥氏体钢分别在室温和 600 °C 低循环疲劳 (LCF) 载荷和 600 °C 蠕变疲劳 (CF) 载荷下的力学行为。UVCM 纳入了粘塑性静态恢复、平均应力演变和应变范围依赖性循环软化的影响。此外,还对材料参数进行了分类,并对每类参数进行了敏感性分析,以探讨其对模拟结果的影响。对于室温和 600 °C 下的 LCF 载荷,分别研究了轴向载荷、循环扭转角和载荷速率对 LCF 响应的影响,并发现了不同的粘性行为和循环软化特性。对于 600 °C 下的 CF 加载,研究了保持时间对 CF 响应的影响,剪应力松弛发生在保持时间内,且保持时间越长越明显。预测结果与实验结果十分吻合,这表明模型具有良好的准确性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Unified viscoplastic constitutive model for creep–fatigue behavior of austenitic stainless steel 304 under axial–torsional loading

Unified viscoplastic constitutive model for creep–fatigue behavior of austenitic stainless steel 304 under axial–torsional loading

Based on the Abdel-Karim and Ohno model framework, a unified viscoplastic constitutive model (UVCM) is developed in order to simulate the mechanical behavior of austenitic steel under low-cycle fatigue (LCF) loading at room temperature and 600 °C and creep–fatigue (CF) loading at 600 °C, respectively. The effects of viscoplastic static recovery, mean stress evolution and strain range-dependent cyclic softening are incorporated into the UVCM. Moreover, the material parameters are categorized and each type of parameter is subjected to a sensitivity analysis in order to explore its effect on the simulation results. For LCF loading at room temperature and 600 °C, the influence of axial loading, cyclic torsional angle, and loading rate on LCF response are, respectively, studied, and different viscous behavior and cyclic softening characteristics are found. For CF loading at 600 °C, the influence of hold time on CF response is investigated, with shear stress relaxation occurring during the hold time and becoming more pronounced the longer the hold time is. The predicted results are in good agreement with the experimental results, which indicates that the model has good accuracy.

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来源期刊
CiteScore
3.60
自引率
13.60%
发文量
536
审稿时长
4.8 months
期刊介绍: The Journal of the Brazilian Society of Mechanical Sciences and Engineering publishes manuscripts on research, development and design related to science and technology in Mechanical Engineering. It is an interdisciplinary journal with interfaces to other branches of Engineering, as well as with Physics and Applied Mathematics. The Journal accepts manuscripts in four different formats: Full Length Articles, Review Articles, Book Reviews and Letters to the Editor. Interfaces with other branches of engineering, along with physics, applied mathematics and more Presents manuscripts on research, development and design related to science and technology in mechanical engineering.
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