{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/110196"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/110196","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"A study of the law of plastic flow of metals","abstract":"These tests were conducted at the Watertown Arsenal by the Army Ordnance Department in a series of tests on thick-walled cylinders. To develop the required hydraulic pressures an 18:1 intensifier was used in a series with a high pressure water pump. A Crosby test gage was used on the low side of the intensifier and readings were corrected from calibration of the intensifier. Pressure was also checked by the electrical resistance of a manganin coil in the high pressure line. Elastic material: The relation of combined stress in elastic material is in accordance with the strain theory as proposed by St. Venant. Plastic material: 1. The plastic (or converted) strain theory with m = 2 is the correct combined stress relation for plastic materials. 2. The true stress-strain diagram or true stress-true elongation (reduction of area) diagram should be used. Residual stresses: Residual stresses are caused by the differences of the permanent stretch given a fiber and the residual strain remaining in this fiber after removing the load. Failures of cylinders: The properties of the material and dimensions of the cylinder determine the radius where failure begins.","abstract_html":"These tests were conducted at the Watertown Arsenal by the Army Ordnance Department in a series of tests on thick-walled cylinders. To develop the required hydraulic pressures an 18:1 intensifier was used in a series with a high pressure water pump. A Crosby test gage was used on the low side of the intensifier and readings were corrected from calibration of the intensifier. Pressure was also checked by the electrical resistance of a manganin coil in the high pressure line. Elastic material: The relation of combined stress in elastic material is in accordance with the strain theory as proposed by St. Venant. Plastic material: 1. The plastic (or converted) strain theory with m = 2 is the correct combined stress relation for plastic materials. 2. The true stress-strain diagram or true stress-true elongation (reduction of area) diagram should be used. Residual stresses: Residual stresses are caused by the differences of the permanent stretch given a fiber and the residual strain remaining in this fiber after removing the load. Failures of cylinders: The properties of the material and dimensions of the cylinder determine the radius where failure begins.","abstract_has_math":false,"creators":["Cockrell, C. 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To develop the required hydraulic pressures an 18:1 intensifier was used in a series with a high pressure water pump. A Crosby test gage was used on the low side of the intensifier and readings were corrected from calibration of the intensifier. Pressure was also checked by the electrical resistance of a manganin coil in the high pressure line. Elastic material: The relation of combined stress in elastic material is in accordance with the strain theory as proposed by St. Venant. Plastic material: 1. The plastic (or converted) strain theory with m = 2 is the correct combined stress relation for plastic materials. 2. The true stress-strain diagram or true stress-true elongation (reduction of area) diagram should be used. Residual stresses: Residual stresses are caused by the differences of the permanent stretch given a fiber and the residual strain remaining in this fiber after removing the load. Failures of cylinders: The properties of the material and dimensions of the cylinder determine the radius where failure begins."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["M.S."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["A study of the law of plastic flow of metals"]}]}],"canonical_facts":{"dc:contributor.department":["Mechanical Engineering"],"dc:creator":["Cockrell, C. M."],"dc:date.accessioned":["2022-05-24T17:21:39Z"],"dc:date.available":["2022-05-24T17:21:39Z"],"dc:date.issued":["1930"],"dc:description.abstract":["These tests were conducted at the Watertown Arsenal by the Army Ordnance Department in a series of tests on thick-walled cylinders. To develop the required hydraulic pressures an 18:1 intensifier was used in a series with a high pressure water pump. A Crosby test gage was used on the low side of the intensifier and readings were corrected from calibration of the intensifier. Pressure was also checked by the electrical resistance of a manganin coil in the high pressure line. Elastic material: The relation of combined stress in elastic material is in accordance with the strain theory as proposed by St. Venant. Plastic material: 1. The plastic (or converted) strain theory with m = 2 is the correct combined stress relation for plastic materials. 2. The true stress-strain diagram or true stress-true elongation (reduction of area) diagram should be used. Residual stresses: Residual stresses are caused by the differences of the permanent stretch given a fiber and the residual strain remaining in this fiber after removing the load. 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