铸造技术2017，Vol.38Issue(5)：1080-1083,4.DOI:10.16410/j.issn1000-8365.2017.05.025
基于XFEM的异型坯表面裂纹扩展模拟研究
Research of Extension Behaviors of Beam Blank Surface Cracks Based on Theory of XFEM
摘要
Abstract
Aimed at surface cracks problem of beam-blank in production process,a two-dimensional thermal-mechanical model was set up,the extension of surface cracks was simulated.During this process,the damage mechanics theory & XFEM & level set method were used.The results show that stress concentration appears at the tip of the crack,the level of stress is higher than other positions,the crack extend forward once when the max principal stress reaches the limit.The prefabricated cracks in different directions extend along the rolling direction mainly,the length of crack extension in descending order is as follows:the longitudinal surface crack,the 75°,45° direction with the direction of casting speed.关键词
异型坯/表面裂纹/扩展有限元/水平集函数/子模型Key words
beam blank/surface crack/XFEM/level set method/sub model分类
矿业与冶金引用本文复制引用
陈伟,于兴旺,王嘉琦,王宝祥,陈颖,马劲红..基于XFEM的异型坯表面裂纹扩展模拟研究[J].铸造技术,2017,38(5):1080-1083,4.基金项目
国家自然科学基金资助项目(51574103) （51574103）
