基于改进SPH方法的冰弯曲强度试验数值模拟  

Numerical simulation of ice bending strength test based on improved SPH method

作　　者：韩端锋[1] 乔岳[1] 薛彦卓[1] Han Duanfeng;Qiao Yue;Xue Yanzhuo(College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China)

机构地区：[1]哈尔滨工程大学船舶工程学院

出　　处：《华中科技大学学报（自然科学版）》2018年第5期54-58,65,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51639004,51509060)

摘　　要：为探讨光滑粒子流体动力学（SPH）方法在处理材料低速碰撞断裂问题方面的适用性,将断裂准则引入到光滑粒子流体动力学方法中,并对冰的三点弯曲试验进行数值模拟.在提出二维断裂面的生成方法基础上,重新定义了粒子间的作用类型,建立了材料破坏部位的应力损伤模型,给出了计算由于碰撞而产生的接触力的模型.研究结果表明：所采用的改进光滑粒子流体动力学方法能有效模拟冰的三点弯曲试验,同时在模拟低速碰撞过程中的物理断裂方面有较好的适用性.In order to discuss the applicability of using smoothed particle hydrodynamics（SPH） method to solve low-velocity impact problems,fracture criterions were introduced into SPH method to simulate ice 3-point bending experiment.The 2 D fracture surface formation method was presented,and the interaction type between particles and stress damage model was defined.Furthermore,the computational model of the contact force was built.Results show that the improved SPH method can simulate the ice 3-point bending experiment accurately,which is feasible to solve the physical fracture problems in low-velocity impact progress.

关 键 词：光滑粒子流体动力学 物理断裂 断裂准则 接触力 弯曲强度 

分 类 号：O343.1[理学—固体力学]