Investigation of non-local cracking in layered stainless steel with nanostructured interface

Guo, Xiang; Leung, A.Y.T.; Chen, A.Y.; Ruan, Haihui; J, Lu

doi:10.1016/j.scriptamat.2010.04.035

Cited by 30 publications

(37 citation statements)

References 28 publications

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“…The CFEM has been successfully applied to predict the damage initiation and evolution explicitly. Furthermore, it can model spontaneous multiple crack behavior, so it has been widely used to investigate damage process [38][39][40][41][42][43]. Here, our interest is in the high nonlinearity involving the interaction of multiple microcracks, and thus the CFEM is particularly appealing.…”

Section: Cohesive Finite Element Methodsmentioning

confidence: 99%

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Local Monte Carlo Method for Fatigue Analysis of Coarse-Grained Metals with a Nanograined Surface Layer

Guo

Sun

Yang

et al. 2018

Metals

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Abstract:The fatigue resistance of coarse-grained (CG) metals can be greatly improved by introducing a nanograined surface layer. In this study, the Weibull distribution is used to characterize the spatially-random fracture properties of specimens under axial fatigue. For the cylindrical solid specimen, the heterogeneity of element sizes may lead to unfavorable size effects in fatigue damage initiation and evolution process. To alleviate the size effects, a three-dimensional cohesive finite element method combined with a local Monte Carlo simulation is proposed to analyze fatigue damage evolution of solid metallic specimens. The numerical results for the fatigue life and end displacement of CG specimens are consistent with the experimental data. It is shown that for the specimens after surface mechanical attrition treatment, damage initiates from the subsurface and then extends to the exterior surface, yielding an improvement in the fatigue life. Good agreement is found between the numerical results for the fatigue life of the specimens with the nanograined layer and experimental data, demonstrating the efficacy and accuracy of the proposed method.

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Section: Cohesive Finite Element Methodsmentioning

confidence: 99%

“…The kinematic hardening model is used to describe the cyclic plastic behavior of the metals. Additionally, the initial stiffness k should be large enough to alleviate the inherent mesh dependence, while too large value may cause numerical ill-conditioning [38,41]. It is determined as 2 10 N/m.…”

Section: D Cfe Geometric Modeling and Quantification Of Constitutivementioning

confidence: 99%

Local Monte Carlo Method for Fatigue Analysis of Coarse-Grained Metals with a Nanograined Surface Layer

Guo

Sun

Yang

et al. 2018

Metals

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“…The bilinear cohesive law, the geometrically simplest form, was used in Guo et al [13,14], as shown in Fig. 1 cohesive element and given by the area under the cohesive law, i.e.,…”

Section: Mesh Dependence In Using the Intrinsic Cfemmentioning

confidence: 99%

“…Compared with the intrinsic CFEM, the extrinsic one involves some issues both in model implementation and in results interpretation [12]. Therefore, the intrinsic CFEM was adopted in our former studies [13,14]. We have shown that both the critical energy release rate and the thickness of the NGIL play critical roles in determining the overall ductility of the co-rolled SMATed 304SS [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the intrinsic CFEM was adopted in our former studies [13,14]. We have shown that both the critical energy release rate and the thickness of the NGIL play critical roles in determining the overall ductility of the co-rolled SMATed 304SS [13,14]. However, the dependences of the simulation results on both shape of the cohesive law and the mesh, important issues in using the intrinsic CFEM, have not been addressed [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Mesh dependence of transverse cracking in laminated metals with nanograined interface layers

Guo

Zhang

Zhu

et al. 2013

Engineering Fracture Mechanics

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High‐Strength and High‐Ductility Nanostructured and Amorphous Metallic Materials

2014

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The development of materials with dual properties of high strength and high ductility has been a constant challenge since the foundation of the materials science discipline. The rapid progress of nanotechnology in recent decades has further brought this challenge to a new era. This Research News highlights a few newly developed strategies to optimize advanced nanomaterials and metallic glasses with exceptional dual mechanical properties of high strength and high ductility. A general concept of strain non-localization is presented to describe the role of multiscale (i.e., macroscale, microscale, nanoscale, and atomic scale) heterogeneities in the ductility enhancement of materials reputed to be intrinsically brittle, such as nanostructured metallic materials and bulk metallic glasses. These nanomaterials clearly form a new group of materials that display an extraordinary relationship between yield strength and the uniform elongation with the same chemical composition. Several other examples of nanomaterials such as those reinforced by nanoprecipitates will also be described.

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Investigation of non-local cracking in layered stainless steel with nanostructured interface

Cited by 30 publications

References 28 publications

Local Monte Carlo Method for Fatigue Analysis of Coarse-Grained Metals with a Nanograined Surface Layer

Local Monte Carlo Method for Fatigue Analysis of Coarse-Grained Metals with a Nanograined Surface Layer

Mesh dependence of transverse cracking in laminated metals with nanograined interface layers

High‐Strength and High‐Ductility Nanostructured and Amorphous Metallic Materials

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