CAJ | 학술논문

在原有流形方法的基础上增加了模拟多裂隙结构体的破坏及跟踪裂缝扩展的功能。对于含有大量节理裂隙的结构，采用传统的摩尔-库仑准则，允许裂缝不仅沿原有的不连续面扩展，而且可以穿过完整介质，导致结构体的破坏。对于单条裂缝的扩展，用作者开发的二阶流形法与局部子域边界元法(BEM)相结合，可精确地求出缝端应力强度因子，并模拟裂缝的扩展。在这一方法中，所模拟裂缝不受网格限制，可沿任意方向扩展，给出的几个算例说明了该模拟方法的合理性。
재원유류형방법적기출상증가료모의다렬극결구체적파배급근종렬봉확전적공능。 대우함유대량절리렬극적결구， 채용전통적마이-고륜준칙， 윤허렬봉불부연원유적불련속면확전， 이차가이천과완정개질， 도치결구체적파배。 대우단조렬봉적확전， 용작자개발적이계류형법여국부자역변계원법(BEM)상결합， 가정학지구출봉단응력강도인자， 병모의렬봉적확전。 재저일방법중， 소모의렬봉불수망격한제， 가연임의방향확전， 급출적궤개산례설명료해모의방법적합이성。
A numerical method is developed for simulating failure and propagation of muitiple cracks based on manifold method. For structures with large number of joints, the Mohr-Coulomb law is used as the criterion of failure. The developed method permits crack not only to propagate along original discontinuities but also penetrate through the mass medium. For propagation of individual crack, the stress intensity factor can be accurately computed by the combination of the author-developed second-order manifold method with local sub-region BEM. The criterion of crack propagation is made according to the theory of fracture mechanics. A simulation method for crack propagation freely through meshes is developed. It is shown from computational examples that the reasonable results can be obtained by the developed method.