ELASTO-PLASTIC ANALYSIS OF A RIGHT-ANGLE BENT BAR STRUCTURE

摘要

The limit analysis for a plastic analysis of structures usually employs an interaction curve. The plastic deformation is believed to proceed to the normal direction on the interaction curve (normality rule) in this analysis. It is supposed without doubt that the normality rule, suggested by R. Hill and D. C. Drucker for the conventional plastic flow, can be applied for the generalized plastic deformation. However, our previous studies show that the radiality rule is reasonable rather than the normality rule for the plastic deformation. In this research, the collapse load on the radiality rule and the normality rule is discussed with investigating the deformational behavior of the right-angle bent bar structure introduced by Heyman.