Failure strain formulation via average stress triaxiality of an EH36 high strength steel

Choung, Joonmo; Nam, Woongshik; Lee, Daeyong; Song, Chang Yong

doi:10.1016/j.oceaneng.2014.09.019

Cited by 32 publications

(14 citation statements)

References 16 publications

(32 reference statements)

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“…This paper proposes a three-dimensional failure strain surface for a ductile steel, called a low-temperature high-tensile steel (EH36), using average stress triaxiality and average normalized lode parameter, along with briefly introducing their theoretical background. It is an extension of previous works by Choung et al (2011;2014a;2014b) and Choung and Nam (2013) …”

mentioning

confidence: 65%

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Development of Three Dimensional Fracture Strain Surface in Average Stress Triaxiaility and Average Normalized Lode Parameter Domain for Arctic High Tensile Steel: Part I Theoretical Background and Experimental Studies

Chong¹,

Park²,

Kim³

2015

Journal of Ocean Engineering and Technology

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ABSTRACT:The stress triaxiality and lode angle are known to be most dominant fracture parameters in ductile materials. This paper proposes a three-dimensional failure strain surface for a ductile steel, called a low-temperature high-tensile steel (EH36), using average stress triaxiality and average normalized lode parameter, along with briefly introducing their theoretical background. It is an extension of previous works by Choung et al. (2011;2014a;2014b) and Choung and Nam (2013)

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mentioning

confidence: 65%

“…소위 GTN ( (Lemaitre, 1985;Bonora et al, 2006;Choung, 2009b). (Bao and Wierzbicki, 2004;Bao, 2005;Choung et al, 2012;Choung and Nam, 2013;Choung et al, 2014a;Choung et al, 2014b). (Bai and Wierzbicki, 2008;Luo and Wierzbicki, 2010;Lou et al, 2012;Bai and Wierzbicki, 2010;Dunand and Mohr, 2011;Lou and Huh, 2013).…”

Section: 서 론mentioning

confidence: 99%

Development of Three Dimensional Fracture Strain Surface in Average Stress Triaxiaility and Average Normalized Lode Parameter Domain for Arctic High Tensile Steel: Part I Theoretical Background and Experimental Studies

Chong¹,

Park²,

Kim³

2015

Journal of Ocean Engineering and Technology

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“…In this paper elasto-plastic material model was used from [4], where it was calibrated from standard tensile test. Many studies [6] have shown that failure simulation can be well described with three parameters: stress triaxiality, failure strain and lode angle. Bai and Wierzbicki [7] have proposed that high strain steel is less sensitive to Lode angle.…”

Section: Assessing Failure Parametersmentioning

confidence: 99%

01.10: Different approaches towards numerical modelling of bolt bearing

Jakše

Može

2017

ce papers

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Bolt bearing is characterized by large plastic deformations that occur mainly near the contact between bolts and plates and may possibly lead to fracture. Numerical modelling of such behaviour is not trivial. The paper focuses on the procedures for numerical analysis that allow numerical modelling of bolt bearing up to fracture. The commercially available software Abaqus software was used for this purpose, taking the advantages of built-in material models and numerical procedures without introducing the user subroutines. The problem of bolt bearing is assessed using static stress analysis, explicit analysis and coupled Eulerian-Lagrange analysis. The fracture model considered is based on stress modified fracture model and relies on the accumulating damage and on the reducing stiffness of finite elements to the point, where they offer no resistance and can be either removed from the model or are left with negligible stiffness. The required parameters (stress triaxiality, equivalent plastic strain to failure and displacement to failure) were determined from the experimental data. A few different bolted connections with different types of failure are analysed with full failure model and the results are compared with experiments. The advantage of Eulerian meshing is considered, where excessive plastic deformations lead to contact problems. Coupled Eulerian-Lagrange analysis with model parts expected to have large deformations were modelled with Eulerian approach and the rest with more conventional Lagrange approach. Diverse material models, element options, time step and their impact on numerical simulation were compared and optimized for speed and accuracy.

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“…본 연구는 이전 연구의 확장이므로 이전에 수행된 실험 및 수치 해석적 과정 과 제시된 파단 변형률 곡선에 대하여도 고찰하였다 (Choung et al, 2011;Choung et al, 2012;Choung et al, 2014a;Choung et al, 2014b;Choung and Nam, 2013). (Choung and Nam, 2013).…”

Section: 서 론unclassified

Development of Three-Dimensional Fracture Strain Surface in Average Stress Triaxiaility and Average Normalized Lode Parameter Domain for Arctic High Tensile Steel: Part II Formulation of Fracture Strain Surface

Chong¹,

Park²,

Kim³

2015

Journal of Ocean Engineering and Technology

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Failure strain formulation via average stress triaxiality of an EH36 high strength steel

Cited by 32 publications

References 16 publications

Development of Three Dimensional Fracture Strain Surface in Average Stress Triaxiaility and Average Normalized Lode Parameter Domain for Arctic High Tensile Steel: Part I Theoretical Background and Experimental Studies

Development of Three Dimensional Fracture Strain Surface in Average Stress Triaxiaility and Average Normalized Lode Parameter Domain for Arctic High Tensile Steel: Part I Theoretical Background and Experimental Studies

01.10: Different approaches towards numerical modelling of bolt bearing

Development of Three-Dimensional Fracture Strain Surface in Average Stress Triaxiaility and Average Normalized Lode Parameter Domain for Arctic High Tensile Steel: Part II Formulation of Fracture Strain Surface

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