A new framework based on continuum damage mechanics and XFEM for high cycle fatigue crack growth simulations

Pandey, V.B.; Singh, I.V.; Mishra, B.K.; Ahmad, S.; Rao, A. Venugopal; Kumar, Vikas

doi:10.1016/j.engfracmech.2018.11.021

Cited by 66 publications

(18 citation statements)

References 60 publications

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“…Kumar et al successfully applied XFEM to simulate the experimental load versus load line displacement curve for CT specimen during fracture toughness evaluation of SA508 carbon steel. Very recently, this approach is extended by Pandey et al to simulate the FCG life coupled with damage in the material. A criterion based on damage law is implemented within the XFEM framework to trace the stress triaxiality during crack growth.…”

Section: Introductionmentioning

confidence: 99%

Investigation of fatigue and fracture behaviour of sensitized marine grade aluminium alloy AA 5754

Kumar

Singh

2019

Fatigue Fract Eng Mat Struct

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In the present study, fatigue and fracture characteristics of sensitized marine grade Al‐Mg (AA 5754) alloy are experimentally evaluated. Received alloy is sensitized at temperatures of 150°C (SENS50) and 175°C (SENS75) for 100 hours. Fracture parameters, KIc and JIc, are experimentally evaluated. Slow strain rate tensile tests at a crosshead speed of 0.004, 0.006, and 0.01 mm/min; fatigue crack growth tests at load ratios (R = Pmin/Pmax) of 0.1, 0.2, and 0.5; and low cycle fatigue tests at four strain amplitudes of (0.3‐0.6)% are performed for SENS50 and SENS75 alloys. Relatively lower magnitude of fracture toughness values are observed for SENS75 specimen. Severe degradation in tensile properties, fatigue crack growth characteristics, and low cycle fatigue lives are observed for SENS75 samples. Extended finite element method is adopted to simulate the elasto‐plastic crack growth during fracture toughness evaluation. Scanning electron microscopy (SEM) is used to understand the failure mechanism of sensitized alloys.

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Section: Introductionmentioning

confidence: 99%

Investigation of fatigue and fracture behaviour of sensitized marine grade aluminium alloy AA 5754

Kumar

Singh

2019

Fatigue Fract Eng Mat Struct

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“…These sharp variations are incorporated into the displacement fields through enrichment functions. The discrete methods are namely extended FEM [2], [3], [4] extended IGA [5], EFGM [6] to name a few. On the other hand, the smeared methods use a continuous definition of a discontinuity.…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Source codes and simulation data for the finite element implementation of the conventional and localizing gradient damage methods in ABAQUS

et al. 2019

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This data article presents the source codes and obtained simulation data for running numerical fracture simulation in the commercial finite element package, ABAQUS. The computational models implemented through these source codes pertain to the conventional and localizing gradient damage method which are used for the modelling of the fracture phenomena in the components and structures. For a detailed description refer to “A comparative study and ABAQUS Implementation of Conventional and Localizing Gradient Enhanced Damage Models [1]”. The implementation is carried out using a feature in the ABAQUS software called the user defined subroutines. The subroutines are a set of coded files which are used to implement any newly developed computational models depicting actual physical phenomena which are not already available in any commercial software. The user subroutines used in this implementations are UEL and UMAT. The present implementation is very user friendly in the sense that the user needs to just type a couple of commands in the ABAQUS command application to run the simulations. Moreover, the ability of the ABAQUS to run large scale simulations using a very sparse amount of computational resources enables researchers and engineers with limited resources to take advantage of a very advanced computational fracture simulation technique.

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“…Thus, it solved the calculation discontinuity problem of FEM. Pandey et al [16] simulated the law of high-cycle fatigue crack growth by combining the continuous damage mechanics method with XFEM. Xi et al [17] used XFEM to simulate the crack growth of rock and discussed the influence of crack surface friction on crack pattern and growth.…”

Section: Introductionmentioning

confidence: 99%

An Approach to Predicting Fatigue Crack Growth Under Mixed-Mode Loading Based on Improved Gaussian Process

et al. 2021

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This paper proposes an approach to predicting fatigue crack growth under mixed-mode loading based on improved Gaussian process. In terms of analyzing the theoretical background for fatigue crack growth, a corresponding finite element model is built to generate sufficient simulation data, which is utilized to obtain the key parameters (e.g., stress intensity factor) for the fatigue crack growth process. And then, a Gaussian process model is achieved to meet the condition that the stress intensity factor is a nonlinear continuous change in crack growth, especially for mixed-mode loading. Following, an idea of local sample densification method is implemented to improve Gaussian sample generation process according to the simplified model of the crack growth path. Based on the above investigation, a fatigue crack growth prediction model using the improved Gaussian process is finished, which is subsequently verified through the test data of lower bainite steel (SCM435) material. The results show that the proposed approach has better computational accuracy and efficiency than the traditional finite element method in predicting fatigue crack growth under mixed-mode loading.INDEX TERMS Fatigue crack growth, mixed-mode, improved Gaussian process, sample space, local sample densification.

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A new framework based on continuum damage mechanics and XFEM for high cycle fatigue crack growth simulations

Cited by 66 publications

References 60 publications

Investigation of fatigue and fracture behaviour of sensitized marine grade aluminium alloy AA 5754

Investigation of fatigue and fracture behaviour of sensitized marine grade aluminium alloy AA 5754

Source codes and simulation data for the finite element implementation of the conventional and localizing gradient damage methods in ABAQUS

An Approach to Predicting Fatigue Crack Growth Under Mixed-Mode Loading Based on Improved Gaussian Process

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