摘要
对比2024铝合金在3种不同状态下的材料性能,确认了2024-W态铝合金的钣金成形优势。采用此状态材料进行实际零件成形,零件成形后底部出现不均匀鼓动。为此通过有限元软件模拟橡皮囊成形过程,研究鼓动成因。通过模拟发现板料大部分均未发生塑性变形,只处于弹性变形阶段,且成形内应力分布不均匀,造成材料压缩屈曲失稳形成鼓动。
This paper compares the mechanical properties of 2024 aluminum alloy in three states,the result confirms that the 2024-W aluminum alloy is one of the best for the sheet metal forming,and produces a part using this aged 2024-W aluminum alloy. After forming,the bottom of the part is not flat. To explain this phenomena,the process of fluid cell forming( Flexforming) is simulated by using the software Pam-stamp. The result shows that the materials' compressive buckling is caused by inhomogeneous deformation with most regions in elastic state and thereby the residual stress distribution is inhomogeneous also.
出处
《机械科学与技术》
CSCD
北大核心
2014年第6期934-938,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(51075332)资助
关键词
2024-W铝合金
橡皮囊成形
屈曲失稳
有限元模拟
aluminum alloys
buckling
computer simulation
finite element method
fluid cell forming
inhomogeneous deformation
stress concentration
作者简介
涂集林(1982-),博士研究生,研究方向为薄板成形和金属塑性成形,tttjlin@mail.nwpu.edu.cn;
王永军(联系人),副教授,博士,wyongjun@nwpu.edu.cn