Update and Improve Subsection NH - Simplified Elastic and Inelastic Design Analysis Methods

Abstract

Guidance on various simplification and construction of load cycles is provided; transition effects from early cycle behavior to steady cylcic state is noted with special attention provided in Appendix 4-mainly for residual stresses in weldments, but applicable in general. Advice on inelastic analysis is provided. b Glossary of terms Yes Nomenclature at start of each Volume; Volume 2/3: Section 3 "Definitions" c Definition of stress intensities Yes Vol 2/3 Section 3.5. R5 avoids use of the term 'stress intensity' as the term applies to fracture mechanics applications in other parts of R5. The terms equivalent stress is used rather than 'stress intensity', and is based upon Mises. d Definition of strain intensities No Vol 2/3 Section 3.5. Equivalent strain (Mises) is used rather than 'strain intensity'. e Definition of primary vs secondary stresses Yes Vol 2/3 Section 3.6; Vol 1 Section 5.2 ASME NH and RCC-MR are referenced; however, there are no tabulated example of how to classify as in ASME NH. f Definition of membrane, bending, peak stresses Yes Vol 2/3 Section 3.6 g Procedure for stress linearization No Vol 2/3 Section 3.6, Appendix A2 Reference made to PVRC project (Hollinger & Hechmer). 6 Yes/No Vol 2/3 Section 6.3 Safety factors on Sy are used; indirectly address this concern. c Structural instability or buckling, under a single load application No Vol 1 Section 3 Buckling is deliberately not considered; predominately pressure vessels under tensile loading, similar case for internals components of AGR.