Two-parameter characterization of elastic–plastic crack front fields: Surface cracked plates under uniaxial and biaxial bending

Wang, Xin

doi:10.1016/j.engfracmech.2012.07.014

Cited by 18 publications

(4 citation statements)

References 39 publications

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“…The critical challenge on quantifying the stress field of crack tip in those welded components is that the crack tip field can be influenced by many factors such as material mismatch (Kumar et al 2014), weldment geometry (Zhou et al 2014), residual stress (Ren et al 2009) and loading state, e.g., biaxial loading (Wang 2012;Shlyannikov et al 2011;Shlyannikov et al 2014;Wang et al 2014). Those factors can lead to the variations of microstructure (Kulkarni et al 2020), stress level (Han et al 2015), fracture toughness (Hemer et al 2020) as well as crack growth rate (Krishnan et al 2018;Alves et al 2020;Velu 2018) for the weldment, among which fracture toughness is an crucial fracture parameter to be determined as it can affect the border of failure assessment diagram which has been widely used as the evaluation tool by the industrial field (Dai et al 2020a).…”

Section: Introductionmentioning

confidence: 99%

“…The further discussion on creep crack growth prediction considering stress triaxility is presented by Alang and Nikbin (2018). A discussion on the biaxial loading for surface crack was given by Wang (2012), where the solutions were analyzed based on the constraint parameter Q in elastoplastic solids. Also for elastoplastic solids, investigations of biaxial effect on the crack tip field as well as crack growth are presented by coauthors (2011, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Characterizations of material constraint effect for creep crack in center weldment under biaxial loading

et al. 2021

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Material mismatch effect on the cracking behavior is an important topic for those welding structures. Characterization of the material constraint effect based on rigorously asymptotic solution is studied in this paper. Based on decomposition of the second order term, the constraint effect characterization parameter is decomposed as material constraint parameter and geometry constraint parameter. In general, the total constraint level for crack tip under undermatch condition is higher than overmatch condition. The specimen with positive biaxiality could

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterizations of material constraint effect for creep crack in center weldment under biaxial loading

et al. 2021

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“…And based on the T-stress solutions, the Q factor solutions for cracked plates under tensile and bending loads have been obtained. 49,50 In a recent work of authors, 51 the elastic-plastic constraint parameter A d was applied to predict the fracture toughness of single-edge-notched-bend (SEN[B]) test specimens. And based on the parameter A d , a load independent unified constraint parameter A d * 52,53 has been investigated and developed using the cracked plates.…”

Section: Introductionmentioning

confidence: 99%

Unified creep constraint parameter solutions for surface cracks in plates under tensile and bending loads

Wang

et al. 2022

Fatigue Fract Eng Mat Struct

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In order to accurately assess creep crack initiation (CCI) and growth (CCG) life for elevated temperature cracked structures, both out‐of‐plane and in‐plane constraints need to be considered, and the unified creep constraint parameter solutions should be investigated. In this work, the new unified creep constraint parameter Ac values for plate structures with various surface crack sizes subjected to tensile and bending loads have been investigated and obtained using three‐dimensional (3D) finite element (FE) analysis. The effects of material creep properties, crack sizes, loading modes, and plate thickness on the parameter Ac have also been analyzed. The estimation equation of Ac for materials with different creep exponent n has been fitted. The parameter Ac solutions can be used in CCI and CCG life evaluation of the C*‐Ac two‐parameter approach for cracked plates subjected to tensile and bending loads.

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“…Therefore, not only the load and geometry effects of in-plane but also those from out-of-plane need to be considered in the fracture mechanics analysis of 3D crack structures (see Refs. [25][26][27][28][29]. In addition, structural components generally experience multiaxial stress state under practical loading conditions, which in the presence of a crack may result in mixed-mode fracture.…”

Section: Introductionmentioning

confidence: 99%

Three‐dimensional mixed‐mode (I and II) crack‐front fields in ductile thin plates — effects of T‐stress

Ding

Wang

2016

Fatigue Fract Eng Mat Struct

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It has been well‐established that the non‐singular T‐stress provides a first‐order estimate of geometry and loading mode (e.g. tension versus bending) effects on elastic–plastic crack‐front field under mode I loading conditions. The objective of this paper is to exam the T‐stress effect on three‐dimensional (3D) crack‐front fields under mixed‐mode (modes I and II) loading. To this end, detailed 3D small strain, elastic–plastic simulations are carried out using a 3D boundary layer (small‐scale yielding) formulation. Characteristics of near crack‐front fields are investigated for a wide range of T‐stresses (T/σ0 = −0.8, −0.4, 0.0, 0.4, 0.8). The plastic zones and thickness and angular and radial variations of the stresses are studied, corresponding to two values of the remote elastic mixity parameters Me = 0.3 and 0.7, under both low and high levels of applied loads. It is found that different T‐stresses have a significant effect on the plastic zones size and shapes, regardless of the mode mixity and load level. The thickness, angular and radial distributions of stresses are also affected markedly by T‐stress. It is important to include these effects when investigating the mixed‐mode ductile fracture failure process in thin‐walled structural components.

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Two-parameter characterization of elastic–plastic crack front fields: Surface cracked plates under uniaxial and biaxial bending

Cited by 18 publications

References 39 publications

Characterizations of material constraint effect for creep crack in center weldment under biaxial loading

Characterizations of material constraint effect for creep crack in center weldment under biaxial loading

Unified creep constraint parameter solutions for surface cracks in plates under tensile and bending loads

Three‐dimensional mixed‐mode (I and II) crack‐front fields in ductile thin plates — effects of T‐stress

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