平板双侧触压的应力强度因子  

STRESS INTENSITY FACTOR OF A PANEL UNDER DOUBLE-SIDE INDENTATIONS

作　　者：王晓华[1] 蔡永梅[1] 谢禹钧[1] 

机构地区：[1]辽宁石油化工大学机械工程学院,辽宁抚顺113001

出　　处：《工程力学》2009年第3期6-8,35,共4页Engineering Mechanics

基　　金：国家自然科学基金项目(50771052)

摘　　要：当二维平面边界承受刚性、平端压头作用时,将会在压头与平面接触角点附近产生Ⅰ型奇异应力场和K-控制区。与Ⅰ型裂纹类似,这种应力场的应力强度因子代表应力场的应力集中程度,K也是触压边界开裂的重要参量。该文利用经典守恒J积分方法建立一个求解双边受压奇异应力场的应力强度因子的新方法,并给出了数值算例。When an elastic panel boundary is subjected to indentations by relatively rigid, square-ended uniform punches, a singular stress field and K-dominant region should be arisen adjacent to the punch edges. The stress intensity factor indicates that the stress intensity degree of the stress field is similar to the mode I crack, so K is an important parameter for boundary fracture cracked under indentations. In present article, a method to formulize the SIF for the singular stress fields induced by double-side indentations is proposed by the basis of the conservation J-integral, some numerical examples are also given.

关 键 词：接触力学 压头 应力强度因子  积分 断裂 

分 类 号：O346.1[理学—固体力学]