OS0402 理想化陽解法を用いた多層溶接時における残留応力解析(OS4-1 シミュレーション技術,OS-4 溶接変形・残留応力の計測技術,シミュレーション技術)

概要

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In this research, the authors proposed a new numerical method for welding mechanics based on the dynamic explicit FEM, named Idealized Explicit FEM. The proposed method and static implicit FEM are compared at the final path of multilayer welding of thick bead-on-plat. It is verified that the transient and residual deformation and stress distribution of the proposed method show good agreement with those of static implicit FEM. In addition, the computing time and memory consumption of the proposed method are 1/12 and 1/40 times shorter than those of static implicit FEM, respectively, in 243,243 degree of freedom model. In addition, parallelization using Graphic Processing Unit (GPU) are applied to idealized explicit FEM to achieve faster computation. The developed method is applied to large scale welding problem that has more than 1 million degree of freedom. As a result, it is found that the developed method is very useful to analyze the large scale welding mechanics problem that has almost the same simulation scale as the practical structures.
一般社団法人日本機械学会の論文
2011-07-16