Creep Deformation of Softened Celluloid under Nonproportional Variable Stresses

概要

論文の詳細を見る
Applying combined tensile and torsional stresses to a thin-walled tube of softened celluloid, creep deformations of the material were investigated experimentally under stress states along stress trajectory with a rectangular corner together with those in the relation of mirror transformation, or under cyclic torsional stresses. Main features revealed may be summarized as follows: (I) It was found that (1) the hardening behavior of the material appeared during the creep deformation under constant stress, (2) the softening behavior occurred in the early period after the corner of the stress trajectory and stress reversal, and (3) the hardening behavior grew with cyclic stress reversal. (II) It was ascertained that the creep deformation behavior was expressed well with use of the viscous-viscoelastic theory including a little disagreement in the cyclic hardening behavior due to stress reversal.
一般社団法人日本機械学会の論文