加工硬化を考慮した円筒の軸圧潰における平均荷重の評価

概要

論文の詳細を見る
In this paper, elastoplastic crushing behavior of circular tubes under axial compressive loading is studied by using nonlinear finite element analysis software MSC.Marc. In particular, effects of strain hardening on the average crushing load P_<ave> in axial collapse are investigated. It is found that the average load P_<ave> depends on the scale of strain-hardening, and the theoretical result of P_<ave> for rigid perfectly plastic material cannot be used to evaluate the load P_<ave> with strain-hardening material. So in order to take into consideration the strain hardening effect on the average load P_<ave>, we propose an energy equivalent flow stress σ_<flow> defined by the value of average effective plastic strain ε^^-_<p, eq> which arises in one folded wrinkle, and evaluate the average load P_<ave> by using σ_<flow> instead of yield stress σ_y. This approximate evaluation agrees well with the experimental result.
一般社団法人日本機械学会の論文
2006-06-25