摘要
研究了304不锈钢薄板在受到面内压缩载荷后发生的屈曲与后屈曲变形及回弹现象。基于通用有限元软件LS-DYNA对比分析了几类典型本构模型对屈曲变形的模拟精度。通过与单向屈曲成形实验进行对比,发现后屈曲变形的数值模拟精度较依赖于硬化模型,对屈服准则较不敏感;而各向同性硬化模型相比于随动硬化模型具有综合优势。利用优化的Barlat屈服准则和Hollomon各向同性硬化模型计算形状复杂的双向屈曲问题,模拟结果与实验结果吻合良好。
The buckling and postbuckling deformation and springback phenomenon of 304 stainless steel sheet metal under in-plane compression load were studied. Based on the general LS-DYNA finite element software, the simulation accuracy of several typical constitutive models for buckling deformation was compared and analyzed. Compared with the uniaxial buckling forming experiment, it is found that the simulation accuracy of postbuckling deformation is more dependent on the hardening models and less sensitive to the yield criterions;while compared with the kinematic hardening model, the isotropic hardening model has comprehensive advantage. The biaxial buckling problem with complex shape was calculated using the optimized Barlat yield criterion and Hollomon isotropic hardening model, and the simulation results are in good agreement with the experimental results.
作者
何乃辉
徐天娇
陈扬
韩先洪
HE Nai-hui;XU Tian-jiao;CHEN Yang;HAN Xian-hong(Institute of Plastic Forming Technology and Equipment,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200030,China;National Engineering Research Center of Die&Mold CAD,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200030,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2021年第12期21-28,共8页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51775336,52175349)。
关键词
304不锈钢
屈曲
材料模型
有限元模型
304 stainless steel
buckling
material model
finite element model
