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RESEARCH PAPERS

Effects of Plasticity on Dynamic Response of Piping Structures

[+] Author and Article Information
L. Lazzeri

Ansaldo S.p.A., Genova, Italy

J. Pressure Vessel Technol 110(3), 263-269 (Aug 01, 1988) (7 pages) doi:10.1115/1.3265598 History: Received March 08, 1988; Online November 05, 2009

Abstract

The analysis of elastoplastic structures under a combination of static and dynamic loads is examined. It is shown that under the hypothesis of a ductile behavior, progressive distortion is the leading failure mechanism. Procedures are described to compute: (a) the equivalent damping due to hysteretic losses; (b) frequency shifting due to structural softening in the plastic fields; (c) ductility effects on dynamic loads; and (d) ratcheting due to a combination of static and dynamic loads.

Copyright © 1988 by ASME
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