A review on micromechanical modelling of progressive failure in unidirectional fibre-reinforced composites

Wan, Lei; Ismail, Yaser; Sheng, Yong; Ye, Jianqiao; Yang, Dongmin

doi:10.1016/j.jcomc.2023.100348

Cited by 17 publications

(5 citation statements)

References 140 publications

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“…In general, the fiber breakage condition is significantly important, because it determines the load-bearing capacity of structural members. Although Hashin’s or the maximum stress failure criterion has been used as the condition in many theoretical models and numerical simulations [ 7 , 11 , 12 , 13 , 14 , 15 , 16 ], the above results newly show that

is the key point when the members are under biaxial tensile loading. In other words, even if the simulated stresses reach the fiber breakage condition, attention should be paid to the phenomenon that a positive

does not generate isolated FB modes, but rather TC&FB first.…”

Section: Resultsmentioning

confidence: 99%

“…In fact, there are very few papers that address biaxial tensile loading tests of unidirectional CFRPs in the 0° and 90° directions. On the other hand, various failure criteria [ 9 , 10 , 11 , 12 , 13 ] have been proposed for the fracture of unidirectional fiber composites, and many computational simulations [ 14 , 15 ] as well as continuum damage mechanics models [ 16 , 17 , 18 , 19 ] have been applied. Their validity has been confirmed by comparing experimental data, such as off-axial tests [ 9 , 10 , 12 , 13 ], axial tension/transverse compression biaxial loading [ 13 ], tension or compression/shear biaxial loading [ 13 , 19 ], transverse tension [ 20 ] or compression [ 21 ], axial tension and transverse compression [ 22 ], in-plane [ 23 ] or out-of-plane shear [ 24 ], and so on.…”

Section: Introductionmentioning

confidence: 99%

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Fracture Behavior of a Unidirectional Carbon Fiber-Reinforced Plastic under Biaxial Tensile Loads

Sanai,

Nakasaki,

Hashimoto

et al. 2024

Materials

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In order to clarify the fracture behavior of a unidirectional CFRP under proportional loading along the fiber (0°) and fiber vertical (90°) directions, a biaxial tensile test was carried out using a cruciform specimen with two symmetric flat indentations in the thickness direction. Three fracture modes were observed in the specimens after the test. The first mode was a transverse crack (TC), and the second was fiber breakage (FB). The third mode was a mixture mode of TC and FB (TC&FB). According to the measured fracture strains, regardless of the magnitude of the normal strain in the 0° direction, TC and TC&FB modes occurred when the normal strain in the 90° direction, εy, ranged from 0.08% to 1.26% (positive values), and the FB mode occurred when εy ranged from −0.19% to −0.79% (negative values). The TC&FB mode is a unique mode that does not appear as a failure mode under uniaxial tension; it only occurs under biaxial tensile loading. Biaxial tensile tests were also conducted under non-proportional loading. The result showed three fracture modes similarly to the proportional loading case, each of which was also determined by the positive or negative value of εy. Thus, this study reveals that the occurrence of each fracture mode in a unidirectional CFRP is characterized by only one parameter, namely εy.

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does not generate isolated FB modes, but rather TC&FB first.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fracture Behavior of a Unidirectional Carbon Fiber-Reinforced Plastic under Biaxial Tensile Loads

Sanai,

Nakasaki,

Hashimoto

et al. 2024

Materials

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“…Previous work has shown that the hydrostatic stress has significant influences on the mechanical behaviour of the polymer, 29 and exhibits a completely different behaviour when subjected to various simple uniaxial loading conditions, such as brittle in tension while plastic in compression and shear. 30 Constitutive models, reported in the literature, to describe the mechanical behaviour of polymeric materials under multiaxial loading 31 include the extended Drucker-Prager (D-P) yield model, associated with a ductile damage criterion, 21 the modified Drucker-Prager plastic damage model, 19 and the elasto-plastic model with an isotropic damage constitutive model. 32 In this study, the polymer matrix was modelled as an isotropic elastoplastic solid.…”

Section: Micromechanical Modelling Of Compositesmentioning

confidence: 99%

Comprehensive inter-fibre failure analysis and failure criteria comparison for composite materials using micromechanical modelling under biaxial loading

Wan

Ullah

Yang

et al. 2023

Journal of Composite Materials

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Inter-fibre failure analysis of carbon fibre-reinforced polymer (CFRP) composites, under biaxial loading conditions, has been a longstanding challenge and is addressed in this study. Biaxial failure analysis of IM7/8552 CFRP unidirectional (UD) composites is conducted under various stress states. Two widely accepted failure criteria, the interactive Tsai-Wu and non-interactive Hashin failure criteria, are comprehensively assessed with finite element-based micromechanical analysis. High-fidelity three-dimensional representative volume elements (RVEs) are subjected to biaxial loadings with imposed periodic boundary conditions. Carbon fibres are assumed to be transversely isotropic and linearly elastic. The Drucker-Prager plastic damage constitutive model and cohesive zone model are utilised to simulate the mechanical response of the matrix and fibre-matrix interface, respectively. Coulomb friction is assumed between the fibres and matrix after interface failure. Two sets of biaxial loading scenarios (i.e. transverse stress dominated and shear stress dominated) with the associated failure modes are selected for the failure analysis and assessment of these failure criteria. A data-driven failure envelope for the composites under biaxial loadings is developed using a univariate cubic spline function. Failure mode transition points are determined under biaxial loadings. It is found that the micromechanics-based numerical model is effective in assessing these two existing criteria.

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“…Among the various computational approaches, the finite element method (FEM) and molecular dynamics (MD) simulations are prominent for addressing the damage mechanisms of polymers and polymer composites. While FEM has successfully reproduced failure and mechanical properties quantitatively [3][4][5], the MD simulations used in this study offer certain advantages. MD simulations calculate thermodynamic properties based on atomic motion, whereas the FEM relies on the constitutive law of a material expressed as a continuum body.…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Simulation of Cumulative Microscopic Damage in a Thermosetting Polymer under Cyclic Loading

Yamada,

Morita,

Takamura

et al. 2024

Polymers

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To develop durable composite materials, it is crucial to elucidate the correlation between nanoscale damage in thermosetting resins and the degradation of their mechanical properties. This study aims to investigate this correlation by performing cyclic loading tests on the cross-linked structure of diglycidyl ether bisphenol A (DGEBA) and 4,4′-diaminodiphenyl sulfone (44-DDS) using all-atom molecular dynamics (MD) simulations. To accurately represent the nanoscale damage in MD simulations, a bond dissociation algorithm based on interatomic distance criteria is applied, and three characteristics are used to quantify the microscopic damage: stress–strain curves, entropy generation, and the formation of voids. As a result, the number of covalent bond dissociations increases with both the cyclic loading and its amplitude, resulting in higher entropy generation and void formation, causing the material to exhibit inelastic behavior. Furthermore, our findings indicate the occurrence of a microscopic degradation process in the cross-linked polymer: Initially, covalent bonds align with the direction of the applied load. Subsequently, tensioned covalent bonds sequentially break, resulting in significant void formation. Consequently, the stress–strain curves exhibit nonlinear and inelastic behavior. Although our MD simulations employ straightforward criteria for covalent bond dissociation, they unveil a distinct correlation between the number of bond dissociations and microscale damage. Enhancing the algorithm holds promise for yielding more precise predictions of material degradation processes.

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A review on micromechanical modelling of progressive failure in unidirectional fibre-reinforced composites

Cited by 17 publications

References 140 publications

Fracture Behavior of a Unidirectional Carbon Fiber-Reinforced Plastic under Biaxial Tensile Loads

Fracture Behavior of a Unidirectional Carbon Fiber-Reinforced Plastic under Biaxial Tensile Loads

Comprehensive inter-fibre failure analysis and failure criteria comparison for composite materials using micromechanical modelling under biaxial loading

Molecular Dynamics Simulation of Cumulative Microscopic Damage in a Thermosetting Polymer under Cyclic Loading

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