基于MSC.Marc软件的板材多点复合渐进成形缺陷研究  

Study on Defects of Multi-Point Composite Incremental Forming of Sheet Metal Based on MSC.Marc Software

作　　者：姜志宏[1] 曾艳祥[1] 刘志刚[1] 周小磊[1] 许琴[1] 

机构地区：[1]江西理工大学机电工程学院,江西赣州341000

出　　处：《热加工工艺》2016年第15期156-159,共4页Hot Working Technology

基　　金：国家自然科学基金项目(50975131);江西省自然科学基金项目(20132BAB206013)

摘　　要：为了研究板材多点复合渐进成形的破裂机理,以典型方锥台制件为对象,通过数值模拟和破裂试验实现对其破裂极限的预测。结果表明,在多点复合渐进成形过程中,制件在拐角处的厚度最小,韧性值最大,侧壁上的厚度和韧性值分布均匀,制件通常在拐角处出现破裂;当韧性值I=4时,数值模拟结果与试验相吻合,应用Lemaitre韧性断裂准则有效预测了1mm厚的1060铝合金板材的破裂极限。In order to study the fracture mechanism of sheet muti-point composite incremental forming, taking the typical square frustum part as the object, the fracture limit of the sheet was forecasted by numerical simulation and the fracture tests. The results show that the minimum thickness and maximum toughness occur in the corner of the parts, and the thickness and toughness uniformly distribute on the wall of the parts. So it is more easy to fracture at the corner of the parts. The simulation results agree with the test results when toughness value 1=4. Using the Lemaitre ductile fracture criteria can effectively predict the fracture limit of 1060 alluminum sheet of lmm thickness.

关 键 词：多点成形 渐进成形 韧性断裂准则 破裂预测 

分 类 号：TG386[金属学及工艺—金属压力加工]