K-0736 ワンバー法による金属材料高速変形試験の数値シミュレーション(S10-2 衝撃材料試験における新展開(2))(S10 衝撃材料試験における新展開)

概要

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In order to explain the apparent peak on the stress-strain curve measured commonly with the impact one-bar tester, two calculations were performed. One is the analytical calculation based on the elastic wave propagation theory to investigate the change of stress wave shape in the output bar due to dispersion. It is found that there appears a strain peak at a measurement point relatively far from the edge of the output bar. The other is the finite element calculation to check the characteristics of mechanical vibration system which is composed of the specimen, attachment and connection parts (pins or screws). It is found that a stress peak can be measured depending on the combination of each mass and spring characteristics even though the material of the specimen does not have a peak in the stress-strain curve.
一般社団法人日本機械学会の論文
2001-08-22