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

作者：Je Jinho; Lee Kukhee; Kim Yunjae^*; Jerng Dongwook

来源：The Journal of Strain Analysis for Engineering Design, 2016, 51(5): 336-346.

DOI：10.1177/0309324716643194

• Crack
• C(t) integral
• elastic follow-up
• secondary stress
• transient creep

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.

• 出版日期2016-7