"柔らかい"試験機による任意の高ひずみ速度下での応力-ひずみ曲線の決定法とその応用

概要

論文の詳細を見る
A modified split-Hopkinson-pressure-bar compression system which operates following a predetermined, constant or variable strain-rate course in specimen is developed and some of its applications are shown. Striker bars of nonuniform cross sections designed on the basis of the elastic-wave-propagation theory are used to generate desired shapes of incident loading pulse. It is shown that a striker bar having a shape of frustum of cone enables constant strain-rate testing throughout the deformation of specimen. The system is used to generate a nearly constant strain-rate in the specimens with different ratios of diameter to height. The dynamic stress-strain data free from the effect of friction between the specimen and tools are then obtained by extrapolating the results. The system is also applied to variable strain-rate tests to investigate the flow characteristics of metals and some examples are demonstrated.
一般社団法人日本機械学会の論文
1985-01-25