梁-颗粒模型的改进及其在无序介质破坏全过程模拟中的应用

为了能够更真实地模拟脆性无序介质的损伤破坏全过程，本文对梁－颗粒细观数值模型进行了部分改进，将颗粒单元由圆形改成了Ｖｏｒｏｎｏｉ多边形．算例表明，改进后的梁－颗粒细观数值模型能够更形象地实时给出介质的破坏图象，这对揭示脆性无序介质的损伤破坏机理等具有一定的理论意义．

Improvement of Beam particle Model and its Application in Fracture Simulation of Brittle Disordered Materials

In order to simulate the fracture process in brittle disordered materials more realistically, the meso mechanical beam particle model is partially improved by changing the particle elements into Voronoi polygons from original disks. The numerical example shows that the evolution history of impact fragmentation patterns can be simulated more vividly than before using the new model. This study may be helpful for revealing the failure mechanism of brittle disordered materials.