Simplified inelastic analysis of notched components subjected to mechanical and thermal loads

Raghavan, Prasanna (1998) Simplified inelastic analysis of notched components subjected to mechanical and thermal loads. Masters thesis, Memorial University of Newfoundland.

[English] PDF (Migrated (PDF/A Conversion) from original format: (application/pdf)) - Accepted Version Available under License - The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. Download (13MB) [English] PDF - Accepted Version Available under License - The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. (Original Version)

Abstract

Estimation of inelastic strains in notched mechanical components and structures are necessary for low cycle fatigue evaluations. This has been a topic of considerable interest to pressure vessel designers. -- The Generalized Local Stress Strain (GLOSS) method is a robust technique that is based on two linear elastic finite element analyses, and has been used for evaluating inelastic strains in pressure components subjected to mechanical loadings. This thesis endeavors to determine the inelastic strains of components and structures that are subjected to both mechanical as well as thermal loadings. A two bar kinematic model is used to explain the fundamental aspects of modulus reduction method. Using the elastic-inelastic equivalence, a procedure to obtain the complete relaxation locus has been provided. Based on the relaxation locus, the GLOSS method is extended for combined mechanical and thermal loadings. -- In this thesis, GLOSS method is applied to several pressure component configurations of practical interest. The strain estimates are then validated by comparing them with inelastic finite element results.

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