Simulation of solitary waves in a monodisperse granular chain using COMSOL multiphysics: localized plastic deformation as a dissipation mechanism
Simulation of solitary waves in a monodisperse granular chain using COMSOL multiphysics: localized plastic deformation as a dissipation mechanism
复制标题
使用 COMSOL 多物理场模拟单分散颗粒链中的孤立波：局部塑性变形作为耗散机制
DOI：
10.1007/s10035-014-0499-z
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发表时间：
2014
期刊：
影响因子：
2.4
通讯作者：
W. Carlson
中科院分区：
文献类型：
--
作者：
R. W. Musson;W. Carlson
用有限元方法模拟了孤立波在单分散颗粒链中的传播。建立该模型是为了解决Lazaridi和Nesterenko的数值和实验结果之间的差异（J Appl Mech Tech Phys 26（3）：405-408 1985）。在他们的工作中，孤立波是通过活塞的冲击在一串粒子中产生的，结果是通过比较链对刚性壁的反应来量化的。他们的数值计算结果是孤立波的力幅值为83 N，而实验测得的力幅值为71 N。在目前的工作中，颗粒链和活塞的构型是从Lazaridi和Nesterenko（J Appl Mech Tech Phys 26（3）：405-408，1985）复制的。类似的孤立波产生，和冯米塞斯应力值表明，局部塑性变形是可能的，即使在低活塞冲击速度。这些结果表明，在Lazaridi和Nesterenko进行的实验中，局部塑性变形可能是耗散的来源。
Solitary wave propagation in a monodisperse granular chain was simulated using the finite element method. The model was built to address a discrepancy between numerical and experimental results from Lazaridi and Nesterenko (J Appl Mech Tech Phys 26(3):405–408 1985). In their work, solitary waves were generated in a chain of particles through impact of a piston, and results were quantified by comparing the chains’ reactions to a rigid wall. Their numerical calculations resulted in a solitary wave with a force amplitude of 83 N, while it was measured experimentally to be 71 N. In the present work, the configuration of the granular chain and piston was duplicated from Lazaridi and Nesterenko (J Appl Mech Tech Phys 26(3):405–408, 1985). Qualitatively similar solitary waves were produced, and von Mises stress values indicated that localized plastic deformation is possible, even at low piston impact velocities. These results show that localized plastic deformation was a likely source of dissipation in experiments performed by Lazaridi and Nesterenko.