拐折裂纹应力强度因子的体积力法研究

A Study of the Stress Intensity Factors of Kinked Cracks by the Body Force Method(BFM)

工程结构中的裂纹扩展时往往呈现拐折，所以折裂纹的研究成为重要课题．本文用体积力法系统研究了受拉伸半无限大板中的折裂纹．文中叙述了体积力法原理，自行编制了全部计算程序．经多方验算，程序正确可靠．大量的计算结果为工程断裂力学提供了有价值的数据结果．

In engineering practice, cracks usually propagates along the kinked path rather than its original direction,so the kinked crack becomes an important problem to be solved in engineering practice. In this paper,the kinked cracks of a semi-infinite plate subjected to extension loading are systematically investigated by using the Body Force Method (BFM). The principle about the application of the BFM to the cracks is described simply and a series of programs are written for solving the kinked crack problems. All the programs are proved correct and reliable. A great number of kinked cracks are calculated,which enriches the materials of the kinked cracks and offers quite valuable data to engineering practice.