Transverse cracking of cross-ply laminates: A computational micromechanics perspective

Herráez, M.; Mora, Diego F.; Naya, F.; Lopes, C.S.; González, C.; LLorca, J.

doi:10.1016/j.compscitech.2015.02.008

Cited by 134 publications

(75 citation statements)

References 29 publications

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“…In this work, the HTA‐6376 composite is used for simulations that is similar to Vaughan and McCarthy and Mortell . Since there is not any property for the HTA‐6376 interface, the available properties of AS4‐8552 composite presented by Herráez et al are employed. By assuming the ideal condition, the macromechanical properties could be defined using homogenization techniques and appropriate simplifications related to the micromechanical properties of microconstituents.…”

Section: Resultsmentioning

confidence: 99%

“…After the initiation of the damage, the linear response terminates. The main properties of the interface such as the normal and shear strength and the fracture energy are t n = 100 MPa, t s = 75 MPa, and G int = 10 J/m 2 , respectively . As shown in Figure , a three‐point bending load is applied on the composite laminates.…”

Section: Resultsmentioning

confidence: 99%

“…The Python code receives the corresponding data related to the center of fibers, models each fiber, and then applies the properties of the randomly distributed fibers and fiber‐matrix interfaces with a maximum of 5% divergence. In overall, the Weibull distribution function is used for distributed fibers through the matrix randomly . This function which is a continuous probability distribution (which is dependent on some parameters such as the strength, modulus, and specimen length) is used to exert the nonuniform interfacial properties of the fibers and matrix cohesive zone into the whole layer to make the modeling closer to the real experimental format.…”

Section: Research Methodology and Modelingmentioning

confidence: 99%

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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: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Research Methodology and Modelingmentioning

confidence: 99%

See 1 more Smart Citation

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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“…Carbon fibers (AS4 from Hexcel) are modeled as a transversely isotropic material, with properties taken from [19]. Their longitudinal elastic modulus, transverse elastic modulus, in-plane Poisson's ratio, out-of-plane…”

Section: Materials Models For the Constituentsmentioning

confidence: 99%

“…Modeling of damage in laminated composites (the scale of millimeters) with direct representation of fibers (the scale of micrometers) requires significant computational resources and is feasible only in 2D formulation [19]. Today, such an approach in 3D would be difficult to realize even with the help of high-performance computer clusters.…”

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confidence: 99%

The effect of voids on matrix cracking in composite laminates as revealed by combined computations at the micro- and meso-scales

Mehdikhani

Petrov

Straumit

et al. 2019

Composites Part A: Applied Science and Manufacturing

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Voids are an important type of manufacturing defects in fiber-reinforced composites. Matrix cracking is sensitive to the presence of voids. Although this cracking occurs at the ply scale, its dynamics is strongly affected by ply's microstructure, in particular, fiber distribution, fiber content, and the presence of voids. In the current study, a computational approach to simulate the influence of intra-laminar voids on cracking in composite laminates is developed. The approach combines finite element models of two scales: a micro-scale model, where the fibers and voids are modeled explicitly, and a meso-scale model, where the cracking phenomenon is captured on the ply scale. The micro-scale model, incorporating plasticity and damage in the matrix, provides input for the meso-scale model, which simulates the progressive cracking by means of the extended finite element method. The methodology is applied to investigate the effect of voids on the density of transverse cracks in cross-ply laminates in function of the quasi-static tensile load. Different sizes and contents of voids, which are chosen based on experimental micro-computed tomography data, are simulated. The numerical experiments show that the presence of voids leads to earlier start of the cracking, with the crack density evolution less sensitive to voids.

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Laminate Squeeze Casting and Equibiaxial Bend Behavior of Carbon Fiber Fabric Reinforced Aluminum Matrix Composites

Nganbe

2020

Adv Eng Mater

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The 2D bend behavior of composites fabricated by the new laminate squeeze casting technique is studied. Particular focus is on effects of the initial alternating solid‐state laminate configuration of aluminum 6061 sheets and carbon fiber fabric. Equibiaxial pin‐on‐ring bend tests are performed. It is shown that hydrostatic pressures around 40 MPa are required, which is at the higher end of the range reported for conventional squeeze casting. This is primarily due to the oxide scale on the aluminum layers that can hinder infiltration and weaken the fiber–matrix interface. However, above the threshold squeeze pressure, flexural modulus, yield strength, and strain hardening modulus continuously increase by up to 11.65%, 90.12%, and 248.28%, respectively. The strong strain hardening behavior suggests initial plastic deformation as pre‐condition for full load transfer to the fibers, indicating that the composites are most efficient when pre‐deformed following casting. Moreover, the ultimate flexural strength improves by up to 322.23% at 3.74 vol% with a maximum value of 1050.95 MPa. The major property improvements are primarily due to the possibility offered by the laminate technique to selectively place the reinforcement at critical sections, in this case, close to the composite surfaces with the highest bend stresses.

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Transverse cracking of cross-ply laminates: A computational micromechanics perspective

Cited by 134 publications

References 29 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

The effect of voids on matrix cracking in composite laminates as revealed by combined computations at the micro- and meso-scales

Laminate Squeeze Casting and Equibiaxial Bend Behavior of Carbon Fiber Fabric Reinforced Aluminum Matrix Composites

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