摘要
基于晶体塑性本构理论,采用Voronoi方法构建了316L不锈钢的代表性体积单元,分析了网格尺寸对模拟结果的影响。通过拟合不同温度下316L不锈钢的拉伸曲线,确定了模型参数与温度的数学关系,并利用其他温度下的拉伸数据验证了晶体塑性模型的准确性。随后进行了参数敏感性分析,以探讨不同参数对拉伸曲线的影响。结果表明,晶体塑性本构模型能够较为准确地模拟316L不锈钢的单轴拉伸行为,通过建立模型参数与温度的定量关系,可以实现不同温度下材料变形行为的模拟。参数敏感性分析表明,参数C_(11)和τ_(0)分别对材料的弹性阶段和塑性阶段有显著影响。
Based on the crystal plasticity constitutive theory,a representative volume element of 316L stainless steel was constructed using the Voronoi method,and the effect of mesh size on the simulation results was analyzed.By fitting the tensile curves of 316L stainless steel at different temperatures,the mathematical relationship between the model parameters and temperature was determined.The accuracy of the crystal plasticity model was verified using tensile data at other temperatures.Subsequently,the parameter sensitivity analysis was conducted to explore the influence of different parameters on the tensile curves.The results show that the crystal plasticity constitutive model can accurately simulate the uniaxial tensile behavior of 316L stainless steel.By establishing the quantitative relationship between the model parameters and temperature,it is possible to simulate the deformation behavior of material at different temperatures.The parameter sensitivity analysis indicates that parameters C_(11)andτ_(0)have significant effects on the elastic and plastic stages of the material,respectively.
作者
吴梓境
张威
周昌玉
WU Zi-jing;ZHANG Wei;ZHOU Chang-yu(School of Mechanical Engineering,Nanjing Tech University,Nanjing 211816,China)
出处
《塑性工程学报》
北大核心
2025年第7期192-199,共8页
Journal of Plasticity Engineering
基金
国家自然科学基金青年基金项目(52005250)。
关键词
晶体塑性
316L不锈钢
拉伸
参数敏感性
crystal plasticity
316L stainless steel
tensile
parameter sensitivity
