An Experimental Study on the Deformation of Materials under Hihg Hydrostatic Pressures : 1st Report, On the Deformation of Cylinders under Internal and External Pressures

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概要

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• There has been published a number of papers on the plastic behavior of metals under hydrostatic pressures but few investigation is reported on the elasto-plastic properties of metals, where high accuracy is required in measurements. In the conventional piston-cylinder type apparatus where the deformation of the specimen together with the hydrostatic pressure is produced by a movement of a piston, an error in stress-measurement is likely to be induced by a frictional force acting between piston and cylinder. A new apparatus using cylindrical specimens which are subjected to the internal and external pressures, has been developed in order to eliminate the error due to the frictional force. The strains and the difference in the internal and the external pressures were measured with high accuracy using wire strain gages. The effect of hydrostatic pressure up to 5 000kg/cm^2 has been studied on the deformation of aluminum and on the yield of low carbon steel. The strss-strain curve and the ultimate pressure of cylinders exhibited little change in aluminum but an increase in its ductility was observed. There was little change in the lower yield point of low carbon steel.

• 一般社団法人日本機械学会の論文

著者

• Sakata Masaru

  The Tokyo Institute Of Technology.

• OKUBO Tetsuo

  The Tokyo Institute of Technology.

関連論文

• An Experimental Study on the Deformation of Materials under Hihg Hydrostatic Pressures : 1st Report, On the Deformation of Cylinders under Internal and External Pressures

スポンサーリンク