双轴载荷下反映裂尖KⅠ和KⅡ耦合作用的修正Dugdale模型  

Modified Dugdale Mode in View of Couple Effect on K_Ⅰ and K_Ⅱ at Crack Tip Under Biaxial Tension

作　　者：牟风[1] 李胜利[1] 王鑫[1] 巨东英 

机构地区：[1]辽宁科技大学材料科学与工程学院,辽宁鞍山114051 [2]崎玉工业大学,日本崎玉3690293

出　　处：《热加工工艺》2009年第20期25-27,30,共4页Hot Working Technology

摘　　要：在小型双轴拉伸实验机上,结合原位观察,获得了含有预裂纹的硅钢板在双轴载荷下的动态变形行为,特别是在裂纹尖端的开口变形,提出了考虑KⅠ和KⅡ耦合作用的应力强度因子的计算方法,修正了经典的Dugdale模型。The pre-crack cold-rolled silicon steel sheet was used in biaxial tensile experiment on the small biaxial tensile machine by in-situ observation, the deforming behavior of silicon steel sheet in dynamic state is obtained, especially, the open deformation of crack tip, and a calculation approach in view of the coupled effect on KⅠ and KⅡ at crack tip is brought forward, then the classical Dugdale mode is modified.

关 键 词：双轴拉伸 应力强度因子 DUGDALE模型 

分 类 号：TG113[金属学及工艺—物理冶金]