Upper Bounds for Accumulated Strains Due to Creep Ratcheting

Author:

O’Donnell W. J.1,Porowski J.2

Affiliation:

1. O’Donnell & Assocs., Inc., Pittsburgh, Pa.

2. Prosynchem, Gliuice, Poland

Abstract

A rigorous method of bounding both the total accumulated strain and the strain ranges due to cyclic operation in the creep regime is presented. These limits can be obtained from the results of purely elastic stress analyses. The basic problem of a cylindrical vessel under internal pressure subjected to cyclic thermal stresses is solved in detail. The results are presented in graphical form suitable for design purposes.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Safety, Risk, Reliability and Quality

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