構造用エポキシ系接着剤バルク材の変形挙動のひずみ速度依存性 : 第1報,塑性せん断ひずみ速度の定式化

概要

論文の詳細を見る
Deformation behavior and strain rate sensitivity of an epoxy resin structural adhesive are experimentally investigated by using an INSTRON-type material testing machine and a split Hopkinson pressure bar apparatus. The experimental results show some fundamental features of a typical compressive stress-strain behavior of glassy polymers with linear elastic and nonlinear inelastic deformation stages. In the inelastic deformation, a peak stress and a strain-softening stage after the peak can be observed in the entire range of strain rate from 10^<-4> to 10^3s^<-1>. In addition, it can be found that the relationship between the peak stress and strain-rate for a semi-logarithm curve is linear in the range of low strain rate, however, the slope of the curve changes at high strain rate and the nonlinear behavior of the peak stress can be obtained against the strain rate. Based on the experimental fact, a plastic shear strain rate is formulated to describe such the nonlinear relationship of peak stress-strain rate for the adhesive. Finally, the validity of the formulated model is shown by comparing with the experimental result.
社団法人日本機械学会の論文
2009-10-25