摘要
采用三维弹塑性热力耦合有限元法模拟了薄壁多筋AZ31镁合金型材温热张力绕弯成形工艺,分析了温度对型材成形性能的影响。结果表明,随着温度升高,等效应力下降,等效塑性应变增加。所用规格的镁合金型材在110-220℃之间能够有效地进行张力绕弯成形,且弯曲后回弹角随温度升高而下降,从110℃的2.42°下降到220℃的1.56°;型材弯曲外侧尺寸畸变程度增大,内侧畸变程度降低。
Based on the three-dimensional elastic-plastic thermo-mechanical coupled finite element meth- od, the warm rotary stretch bending process of thin-wall multi-ribs AZ31 magnesium alloy profile was simulated. The effects of temperature on forming property of the profile were investigated. The results show that with the temperature increase, the equivalent stress is decreased and the equivalent plastic strain is increased. The various specification magnesium alloy profile can be formed by rotary stretch bending effectively between 110 ℃ and 220 ℃. The springback angle is decreased from 2.42° of 110 ℃ to 1.56° of 220 ℃. The distortion outside of the bent profile is increased and the inside one is decreased simultaneously.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2016年第7期755-758,共4页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(51305188)
材料成形与模具技术国家重点实验室开放课题研究基金资助项目(P2015-12)
关键词
薄壁多筋型材
张力绕弯成形
数值模拟
Thin-wall Multi-ribs Profile, Rotary Stretch Bending, Numerical Simulation
