CAJ | 학술논문

分叉开裂问题是一个新型的断裂力学问题，本文利用经典 J i-积分守恒律，对部分路径积分，分析Ⅱ型裂纹分叉开裂时能量释放率，并指出裂纹边界分叉开裂的应力强度因子与 J i-积分的关系。当裂尖奇异应力场的应力集中达到一定程度时，即达到临界条件时，该应力场所在的边界将开裂，通过边界移动的能量释放率的分析定量地给出了边界分叉开裂能量释放率数学表征及边界开裂的极限临界载荷。
분차개렬문제시일개신형적단렬역학문제，본문이용경전 J i-적분수항률，대부분로경적분，분석Ⅱ형렬문분차개렬시능량석방솔，병지출렬문변계분차개렬적응력강도인자여 J i-적분적관계。당렬첨기이응력장적응력집중체도일정정도시，즉체도림계조건시，해응력장소재적변계장개렬，통과변계이동적능량석방솔적분석정량지급출료변계분차개렬능량석방솔수학표정급변계개렬적겁한림계재하。
The cracking branching is a new type of fracture problem.The classic J i-integral has been further explored utilizing a partial integral path,from which an analytical solution of the energy release rate for mode-Ⅱ crack-branching.The SIFs is determined for the crack based on the J i-integral.When the singular stress field reaches its critical value,fracture will take place on the surface of boundary.The fracture of crack-branching is formulized and the critical load also is analytically derived by using the energy release rate of boundary translation.