中国机械工程2025，Vol.36Issue(5)：1074-1082,9.DOI:10.3969/j.issn.1004-132X.2025.05.019
考虑厚向应力的板材临界起皱判据建立及影响
Establishment and Influences of Critical Wrinkling Criterion of Sheet Metals Considering Thickness Stress
摘要
Abstract
Wrinkling instability was one of the main technical challenges affecting the precise plas-tic forming of thin-walled parts.The stress state in the thick direction had a great influence on the forming limit of the sheet metals during the sheet forming processes.In view of the above problems,the wrinkling instability of sheet metals in plastic forming processes was studied under different thick-ness stress conditions.The Buckle-Dynamic algorithm in ABAQUS software was combined with solid element modeling to establish a numerical analysis model of liquid-filled compression of fan-shaped parts,and the accuracy of the simulation algorithm was verified by tests.According to the wrinkling bifurcation theory and numerical analysis results,a method was adopted for defining the critical wrin-kling time of the plates considering the thickness stress,and the critical wrinkling limit curve was es-tablished under the compression conditions of the plates.The influences of thickness stress on the compression wrinkling behaviors,wrinkle resistances and the positions of critical wrinkling limit curve in space of fan-shaped parts were discussed.The results show that the applications of thick stress may improve the wrinkle resistances of the sheets and improve the forming quality,which pro-vides useful reference and experimental basis for the selection of sheet metal forming parameters and the trial production of typical parts.关键词
起皱失稳/实体单元建模/扇形件充液压缩/厚向应力/临界起皱判定线Key words
wrinkling instability/solid element modeling/liquid-filled compression of fan-shaped part/thickness stress/critical wrinkling limit curve分类
矿业与冶金引用本文复制引用
杜冰,李扬,刘凤华,董明鑫,万宇凡,钟庆帅..考虑厚向应力的板材临界起皱判据建立及影响[J].中国机械工程,2025,36(5):1074-1082,9.基金项目
国家自然科学基金(52175367) （52175367）
河北省省级科技计划(236Z1011G) （236Z1011G）
