【摘要】 推导耦合过渡区内参变量信息交换的元/网格动量传递多尺度算法,建立离散元与有限元耦合时空多尺度计算模型,并应用于激光辐照下受拉铝板破坏行为的数值模拟中.通过对比有限元计算模型、空间多尺度计算模型与时空多尺度计算模型在激光辐照下受拉铝板破坏算例的模拟结果,验证离散元与有限元耦合时空多尺度计算模型的准确性和数值计算高效率优势.使用该多尺度计算模型从宏观和细观尺度对铝板破坏行为进行数值模拟,模拟结果与实验结果基本一致.更多还原

【Abstract】 A multiscale algorithm with element/mesh momentum transfer of parameters and variable information exchange in coupling transition zone between discrete element method(DEM) and finite element method(FEM) is deduced.Multiscale computation of time and space with coupling of DEM and FEM is established.The algorithm and the model are applied to damage of a pre-tensioned aluminum plate under laser irradiation.Compared with results in FEM model,multiscale model of space and multiscale model of time and space,the multiscale model of time and space by coupling DEM and FEM is shown accurate and highly efficient.Damage of a pre-tensioned aluminum plate under laser irradiation is simulated in multiscale model of time and space from macro-and meso-scale.Simulated results are coincident with experimental resuts.更多还原