【摘要】 采用二维格构模型来模拟岩石类非均质材料的开裂过程。该方法能较好地反映材料微结构对开裂的影响。该模型中 ,岩石类连续介质被离散为由弹性杆或梁组成的二维格构。单元的属性根据某种概率分布而变化 ,以体现材料的随机不均质性 ,材料的开裂破坏通过单元的断裂来实现。算例表明 ,该模型能较好的模拟出岩石类材料的开裂过程及其荷载 -位移曲线。更多还原

【Abstract】 A new method, lattice model, is presented to simulate the fracture of disordered brittle materials, such as rock, concrete. In this model, a material is discretized as a lattice consisting of truss or beam elements. Fracture is simulated by performing a linear elastic analysis of the lattice under loading and removing an element from the lattice that exceeds a certain threshold quantities. By introducing heterogeneity of element parameters, lattice model can simulate the microstructural features of the materials. With the lattice model, realistic crack pattern is obtained.更多还原