边坡破裂过程的断裂力学分析

该文采用线弹性断裂力学原理分析边坡的破坏机理,运用ansys软件模拟边坡在失稳破坏过程中裂缝的扩展过程,分析应力强度因子在裂纹扩展过程中的变化规律。首先在坡顶最易开裂位置假设第一条裂缝,利用断裂韧性确定该裂缝的临界缝长和扩展角,依次扩展直至贯通,所形成的边坡破裂面基本符合实际,分析表明了该方法的可行性。

Fracture Mechanics Analysis on Slope Failure Process

The slope failure mechanism is analyzed with linear elastic fracture mechanics. Through the simulation of crack expansion process in slope instability and failure process, variation rule of stress intensity factor in the crack expansion process is analyzed. The first crack is assumed at the place most vulnerable to cracks on slope top with critical length and expansion angle determined through fracture toughness, and the slope fracture surface formed by the cut-through cracking basically fits the real situation. The analysis proves the feasibility of such method.