A multi phase-field fracture model for long fiber reinforced composites based on the Puck theory of failure

Dean, Aamir; Kumar, Pavan Kumar Asur Vijaya; Reinoso, J.; Gerendt, Christian; Paggi, Marco; Mahdi, E.; Rolfes, Raimund

doi:10.1016/j.compstruct.2020.112446

Cited by 87 publications

(17 citation statements)

References 61 publications

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“…Hence, nanocomposites can be incorporated [ 37 , 38 ]. Sophisticated non-local damage models based on the phase-field approach to fracture can be employed to improve the numerical prediction, see [ 39 , 40 , 41 ]. …”

Section: Discussionmentioning

confidence: 99%

Design and Evaluation of Hybrid Composite Plates for Ballistic Protection: Experimental and Numerical Investigations

2021

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In this paper, hybrid composite plates for ballistic protection were investigated experimentally and numerically, with a target to reduce the weight of currently used body armor inserts and, at the same time, satisfy the requirements of the National Institute of Justice’s (NIJ) ballistic protection standards. The current study has three phases to improve the ballistic plate’s energy absorption capability. The first phase is devoted to studying the effect of the material types, including three different fibers: carbon fiber, date palm fiber, and Kevlar fiber. The second phase is dedicated to studying the effect of hybridization within layers. The two previous phases’ results were analyzed to optimize the material based on the hybrid composite ballistic plate’s maximum energy absorption capability. The commercial finite element software package LS-DYNA was employed for numerical modeling and simulation. The hybrid composite ballistic plate could absorb more impact energy than the non-hybrid Kevlar plate with the same area density from the numerical simulation results. This study provides lighter-weight ballistic inserts with a high protection level, making movement easier for the wearer. The numerical results were verified by comparing results of a plate made of 40 layers of Kevlar with an actual ballistic test. The results indicated that the simulation results were conservative compared to the ballistic test.

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Section: Discussionmentioning

confidence: 99%

Design and Evaluation of Hybrid Composite Plates for Ballistic Protection: Experimental and Numerical Investigations

2021

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“…In classical Continuum Damage Mechanics CDM, the total internal energy is a state function of strain tensor  and internal damage like variable d [1], [12], [13] The consistent generalization of the isotropic damage formulation for the consideration of different failure mechanisms can be postulated by the additive decomposition of the total internal energy into multiple contributions, in which each of them is associated with a certain failure mechanism. In such a postulation, a scalar damage variable Herein, this additive decomposition postulation is applied within the context of PF approach to fracture for the prediction intra-laminar failure in UFRPs.…”

Section: Multi Phase-field Formulationmentioning

confidence: 99%

“…As long as the IFF Q is active, the inter-fiber failure phase-field crack 5. CONCLUSION Fracture events in different Unidirectional Fiber Reinforced Polymers (UFRPs) laminates were investigated virtually using the Finite Element (FE) code ABAQUS employing a newly proposed multi Phase-Field (PF) fracture model [1]. Three different fracture problems were herein considered (i) fracture in single-edge notched laminated specimens, (ii) matrix cracking in cross-ply laminates, and (iii) delamination migration in multi-layered UFRPs.…”

Section: /mentioning

confidence: 99%

Phase-Field Modeling of Damage and Fracture in Laminated Unidirectional Fiber Reinforced Polymers

Dean

Kumar

Babiker³

et al. 2021

FJES

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The damage and fracture behavior of Fiber Reinforced Polymers (FRPs) is quite complex and is different than the failure behavior of the traditionally employed metals. There are various types of failure mechanisms that can develop during the service life of composite structures. Each of these mechanisms can initiate and propagate independently. However, in practice, they act synergistically and appear simultaneously. The difficulties that engineers face to understand and predict how these different failure mechanisms result in a structural failure enforce them to use high design safety factors and also increases the number of certification tests needed. Considering that the experimental investigations of composites can be limited, very expensive, and time-consuming, in this contribution the newly developed multi Phase-Field (PF) fracture model [1] is employed to numerically study the failure in different Unidirectional Fiber Reinforced Polymers (UFRPs) laminates, namely, fracture in single-edge notched laminated specimens, matrix cracking in cross-ply laminates, and delamination migration in multi-layered UFRPs. The formulation of the PF model incorporates two independent PF variables and length scales to differentiate between fiber and inter-fiber (matrix-dominated) failure mechanisms. The physically motivated failure criterion of Puck is integrated into the model to control the activation and evolution of the PF parameters. The corresponding governing equations in terms of variational formulation is implemented into the Finite Element (FE) code ABAQUS utilizing the user-defined subroutines UMAT and UEL.

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“…Such an approach was used to develop a micro-mechanical model of the fibre-matrix debonding and matrix cracking interaction [18]. At the macro-scale, a phase-field method with two auxiliary variables, respectively for fibre and inter-fibre failures, was developed in [19] to simulate the crack propagation in UD-CFRP composites. In this approach, the applied constitutive law remains at the composite ply scale, facing the same problem as the other macro-scale anisotropic damage models for which the propagation of crack/damage zones cannot always be captured correctly accordingly to the ply orientation.…”

Section: Introductionmentioning

confidence: 99%

Per-phase spatial correlated damage models of UD fibre reinforced composites using mean-field homogenisation; applications to notched laminate failure and yarn failure of plain woven composites

Zhang

Maillard

et al. 2021

Computers & Structures

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A micro-mechanical model for fibre bundle failure is formulated following a phase-field approach and is embedded in a semi-analytical homogenisation scheme. In particular mesh-independence and consistency of energy release rate for fibre bundles embedded in a matrix phase are ensured for fibre dominated failure. Besides, the matrix cracking and fibre-matrix interface debonding are modelled through the evolution of the matrix damage variable framed in an implicit non-local form. Considering the material parameters of both fibre and epoxy matrix phases identified from manufacturer data sheets, it is shown that the failure strength of a ply loaded along the longitudinal

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A multi phase-field fracture model for long fiber reinforced composites based on the Puck theory of failure

Cited by 87 publications

References 61 publications

Design and Evaluation of Hybrid Composite Plates for Ballistic Protection: Experimental and Numerical Investigations

Design and Evaluation of Hybrid Composite Plates for Ballistic Protection: Experimental and Numerical Investigations

Phase-Field Modeling of Damage and Fracture in Laminated Unidirectional Fiber Reinforced Polymers

Per-phase spatial correlated damage models of UD fibre reinforced composites using mean-field homogenisation; applications to notched laminate failure and yarn failure of plain woven composites

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