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. / M.S.
| Identifer | oai:union.ndltd.org:VTETD/oai:vtechworks.lib.vt.edu:10919/110196 |
| Date | January 1930 |
| Creators | Cockrell, C. M. |
| Contributors | Mechanical Engineering |
| Publisher | Virginia Agricultural and Mechanical College and Polytechnic Institute |
| Source Sets | Virginia Tech Theses and Dissertation |
| Language | English |
| Detected Language | English |
| Type | Thesis, Text |
| Format | 48 pages, 4 unnumbered leaves, application/pdf, application/pdf |
| Rights | In Copyright, http://rightsstatements.org/vocab/InC/1.0/ |
| Relation | OCLC# 29997986 |
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