Effect of tensile properties on time-dependent C(t) and J(t) integrals in elastic-plastic-creep FE analysis. (October 2016)

• Record Type: Journal Article
• Authors: Lee, So-Dam; Lee, Han-Sang; Kim, Yun-Jae; Ainsworth, Robert A.; Dean, David W.
• Is Part Of: International journal of pressure vessels and piping. Volume 146(2016)
• Page Start: 171
• Page End: 178
• Publication Date: 2016-10
• Subjects: Elastic-plastic-creep -- C(t) integral -- J(t) integral; Pressure vessels -- Periodicals; Pipe -- Periodicals; Récipients sous pression -- Périodiques; Tuyaux -- Périodiques; Pipe; Pressure vessels; Periodicals; 681.76041
• DOI: 10.1016/j.ijpvp.2016.08.004
• Languages: English
• ISSNs: 0308-0161

Abstract

Abstract: This technical note presents the effect of elastic-plastic properties on calculated time-dependent C ( t ) and J ( t ) values. This is investigated via systematic elastic-plastic-creep finite element (FE) analysis. Three different stress-strain curves are used, having essentially the same plastic properties at large strains but different tensile data near the 0.2% proof (yield) strength. It is found that the plastic property in stress-strain curve affects the FE C ( t ) values only at short times (within approximately 20% of the redistribution time). The plastic property affects the initial J values at time t = 0 but not the rate of change of J ( t ) with time. Highlights: The effect of elastic-plastic properties on calculated time-dependent C ( t ) and J ( t ) values is presented via FE analysis. The plastic property affects the FE C ( t ) values only at short times up to ∼20% of the redistribution time. The plastic property affects the initial J values at time t = 0 but not the rate of change of J ( t ) with time.