A simple method to estimate elastic follow-up factors for transient creep parameter C(t) under secondary stress. (July 2016)

• Record Type: Journal Article
• Authors: Je, Jinho; Lee, Kukhee; Kim, Yunjae; Jerng, Dongwook
• Is Part Of: Journal of strain analysis for engineering design. Volume 51:Number 5(2016)
• Page Start: 336
• Page End: 346
• Publication Date: 2016-07
• Subjects: Crack -- C(t) integral -- elastic follow-up -- secondary stress -- transient creep; Strains and stresses -- Periodicals; Strain gages -- Periodicals; 624.176
• DOI: 10.1177/0309324716643194
• Languages: English
• ISSNs: 0309-3247

Abstract

In this article, a semi-analytical method to estimate elastic follow-up factor as input to estimate the transient creep C ( t ) parameter under secondary loading is presented and validated against finite element results for a cracked two-bar structure under constant displacement loading. Predicted values of C ( t ) agree well with the finite element results for both elastic-creep cases and for elastic-plastic cases with the same creep and plastic hardening exponents. For elastic-plastic-creep cases with different creep and plastic hardening exponents, the proposed method gives good predictions at long time but can under- or over-predict C ( t ) at short time.