Effect of circular holes on the ratchet limit and crack tip plastic strain range in a centre cracked plate

Abstract

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Fatigue crack growth modelling based on CTOD for the 7050‐T6 alloy

“…The link between NLP and da/dN has been exploited in literature using theoretical models and empirical relations . The NLP parameters identified in the literature review made by Antunes et al are the range of cyclic plastic strain, the size of reversed plastic zone, the total plastic dissipation per cycle and the crack opening displacement (COD). Note that these NLP, and also the J integral, usually replace K when the LEFM is no longer valid .…”

A plastic shakedown constitutive curve based on uniaxial ratcheting behavior of 304 stainless steel at room temperature

“…The well‐known Armstrong–Frederick kinematic hardening model (A–F), which is based on strain hardening and dynamic recovery of back stress, was reported to overestimate the ratcheting strain . Subsequently, the models based on the A–F with modification of the dynamic recovery term have been proposed to improve the prediction, for example, Chaboche, Ohno and Wang, Abedl and Karim, Hassan and Kyriakides, Kang et al ., Jiang and Sehitoglu, Zakavi, Jiao, Dahlberg, Liang, Adibi‐Asl, Chen, Zhang and Ahmadzadeh . Among these models, the nonlinear kinematic hardening rule with the critical state for dynamic recovery developed by Ohno and Wang is considered to be the most successful.…”

Study on the Influence of the Gurson–Tvergaard–Needleman Damage Model on the Fatigue Crack Growth Rate

“…The study of the nonlinear crack tip phenomena emerged as an alternative to the study based on ∆K. Different non-linear parameters have been used, namely the range of cyclic plastic strain [9], the size of the reverse plastic zone [10] and the total plastic dissipation per cycle [11]. The plastic crack tip opening displacement (CTOD p ) has also been used to predict FCG [12][13][14][15].…”