棒料热应力预制V型槽尖端理想裂纹的可行性研究  

Feasibility investigation of ideal fracture caused by thermal stress

作　　者：赵升吨[1] 张立军[1] 柳伟[1] 化春键[1] 

机构地区：[1]西安交通大学机械工程学院,西安710049

出　　处：《塑性工程学报》2006年第5期51-57,共7页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(50375117)

摘　　要：针对研究新型低应力精密下料系统时,需要获得热应力预制V型槽尖端理想裂纹方法的有效性问题。利用ANSYS软件,建立了棒料的有限元分析模型,并对其V型槽尖端区的温度场和应力场进行了数值模拟研究。研究结果表明,对于45#钢、20#钢、60Si2Mn棒料来说,在现有给定的参数下,其V型槽尖端均发生了塑性变形,但只有60Si2Mn棒料在其V型槽尖端点产生了热裂纹。To investigate a new type of low stress precision cropping system, it is necessary to obtain the feasibility that the heat stress was used to prefabricate the ideal crack of Ⅴ-shaped notch tip. ANSYS software was applied to build the finite element model of the slotted bar and the temperature field and heat stress field were analyzed in detail. The analytical results show that plastic yield occurs in the tip of Ⅴ-shaped notch of 45 steel bar, 20 steel bar and 60Si2Mn bar under the condition of given parameters, but the heat crack only appears in the tip point of Ⅴ-shaped notch of 60Si2Mn bar.

关 键 词：精密下料 热应力 有限元 应力场 

分 类 号：TG306[金属学及工艺—金属压力加工]