A computational continuum damage mechanics model for predicting transverse cracking and splitting evolution in open hole cross‐ply composite laminates

Babaei, Reza; Farrokhabadi, Amin

doi:10.1111/ffe.12502

Cited by 10 publications

(6 citation statements)

References 39 publications

(116 reference statements)

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“…Many experimental and numerical works also have studied the effects of matrix cracking on the stiffness of composite laminates . Sadeghi et al introduced a numerical tool to investigate the matrix cracking damage in laminated composites.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of matrix cracking propagation in cross‐ply laminated composites subjected to three‐point bending load using concurrent multiscale model

Madadi

Naghdinasab

Farrokhabadi

2020

Fatigue Fract Eng Mat Struct

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The purpose of the present study is to analyze fiber-matrix debonding and induced matrix cracking formation as two major micromechanical damage modes in cross-ply composite laminates using a two-dimensional numerical approach. To this aim, the cross-ply laminates containing 90-degree layers are modeled, where the fibers are arranged randomly in transverse plies. Damage modes in this numerical model are simulated by the cohesive surface method. The performed analyses reveal that in the laminates with 90-degree layers located in the outer positions, the primary micro damage mode is micro matrix cracking which is initiated from the fiber-matrix debonding damage mode and will be followed by matrix cracking. The main benefit of the present study in comparison to other numerical methods is proposing a virtual test method for damage analysis of different cross-ply laminates in which, the matrix cracking formation will emerge physically in a random and antisymmetric pattern similar to the experimental observations. K E Y W O R D S

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Section: Introductionmentioning

confidence: 99%

Numerical investigation of matrix cracking propagation in cross‐ply laminated composites subjected to three‐point bending load using concurrent multiscale model

Madadi

Naghdinasab

Farrokhabadi

2020

Fatigue Fract Eng Mat Struct

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“…Performing as a destabilizing factor, the softening may induce localization of dissipative processes into narrow bands. Since its development, CDM-based models have been widely used in predicting the failure behaviors for both homogeneous (Baghani et al., 2012; Ganjiani et al., 2011; Nguyen et al., 2013) and heterogeneous materials (Ayadi et al., 2018; Babaei and Farrokhabadi, 2017; Bakhshan et al., 2017; Voyiadjis et al., 2007; Wu and Ju, 2017).…”

Section: Introductionmentioning

confidence: 99%

A mesh objective continuum damage model for quasi-brittle crack modelling and finite element implementation

Gao

Liu

2019

International Journal of Damage Mechanics

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In the framework of continuum damage mechanics, a computational model for quasi-brittle crack modelling is proposed. The proposed model has significant mesh-objectivity and accuracy advantages over existing methods for modeling quasi-brittle crack. These stem from the combination of the local crack tracking algorithm, the new calculation of crack bandwidth and the non-local treatment regarding strain field. Resorting to the implementation of local crack tracking algorithm, it is desirable that the spurious dependence of conventional continuum damage mechanics-based model on mesh bias can be effectively addressed. The new estimation of the real-time crack bandwidth can be not only depending on the element size and pattern, but also on the physical crack path within each consolidate cracked element. Thus, the energy dissipation during crack propagation can be characterized in a more accurate, physically based manner. The non-local averaging regarding the strain field in the course of failure evolution is carried out within an elliptical domain, the configuration of which is related to finite element and crack trajectory obtained by the local crack track algorithm. With this combined technique, it is expected that a more accurate crack evolution course can be achieved numerically, which allows engineers to adopt relatively coarse unstructured discretizations without sacrificing solution accuracy. By numerical examples, the proposed model, empowered by the combined techniques, demonstrates significant improvements in the prediction of crack propagating of quasi-brittle materials. This model may provide engineers a more reliable tool in practical application of computational material failure.

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“…With the combined use of failure criteria and damage evolution law, a number of progressive damage models based on continuum damage mechanics have been developed to predict the strength and failure modes of composites. 2–7 Hashin-type failure criteria, in which several failure modes were considered, were widely used to predict the strength and damage behavior of composite laminates. 8,9 To represent satisfactory accuracy of the quasi-brittle failure due to damage accumulation, gradual stiffness degradation laws (linear, quadratic, exponential) were developed for damaged material instead of ply discount method.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of shear nonlinearity and failure analysis for composite laminates

Wang

Jia

Huang

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this paper, the shear nonlinearity and failure behavior of composite laminates were investigated with experimental and numerical method. A nonlinear shear model that includes progressive stiffness reduction and permanent shear strain was developed to characterize the nonlinear shear behavior. Strain-based failure criteria were combined with a set of stiffness degradation method to predict in-ply damage initiation and evolution of composite laminates. Delamination damage was simulated with cohesive zone model. The progressive damage model was implemented in commercial finite element software ABAQUS by a VUMAT subroutine. The capability of the proposed model was validated by predicting the tensile behavior of open-hole tensile specimen.

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A computational continuum damage mechanics model for predicting transverse cracking and splitting evolution in open hole cross‐ply composite laminates

Cited by 10 publications

References 39 publications

Numerical investigation of matrix cracking propagation in cross‐ply laminated composites subjected to three‐point bending load using concurrent multiscale model

Numerical investigation of matrix cracking propagation in cross‐ply laminated composites subjected to three‐point bending load using concurrent multiscale model

A mesh objective continuum damage model for quasi-brittle crack modelling and finite element implementation

Numerical modeling of shear nonlinearity and failure analysis for composite laminates

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