Modes of Failure—Primary and Secondary Stresses

[+] Author and Article Information
R. L. Roche

Institut National des Sciences et Techniques Nucléaires, DEMT/CEN Saclay, Gif sur Yvette, France

J. Pressure Vessel Technol 110(3), 234-239 (Aug 01, 1988) (6 pages) doi:10.1115/1.3265594 History: Received March 18, 1988; Online November 05, 2009


The paper begins with a reminder that the purpose of stress classification is to ensure suitable margins with respect to failure modes. The distinction between primary stresses and secondary stress is then examined and a method is given for assessing the degree of spring effect (elastic follow-up) in the elastic plastic field. The importance of the spring effect is then highlighted by an examination of the effect of primary and secondary stresses on instability and on crack behavior.

Copyright © 1988 by ASME
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