縦衝撃を受ける粘弾/粘塑性棒の動的材料特性値の同定

概要

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The dynamic stress-strain curves for Pb-Sn alloys have been obtained by a longitudinal impact test of tapered bars with rectangular cross section. The history of stress was estimated using an elastic input bar (a stress bar), while the corresponding plastic strain was measured directly using a strain gauge on the test bar. The relationship between the dynamic overstress and the plastic strain rate was derived from these data of the history of stress and strain. Thus the constitutive equation of viscoplastic type was described by a power-law relationship between the foregoing overstress and strain rate. The problems corresponding to the longitudinal impact tests were analyzed numerically using the estimated constitutive equation. The numerical results were in good agreement with the experimental results.
一般社団法人日本機械学会の論文
1995-04-25