Microscopic failure mechanisms of fiber-reinforced polymer composites under transverse tension and compression

Yang, Lei; Yan, Ying; Liu, Yujia; Ran, Zhiguo

doi:10.1016/j.compscitech.2012.08.001

Cited by 200 publications

(85 citation statements)

References 33 publications

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“…The failure mode shown in Fig.12c is similar to the final accumulated failure of the RVE in FEM when perfectly plastic matrix assumption is used [19]. However, it is quite different from those models using other failure criteria to represent matrix yielding, such as Mohr-Coulomb model [7] and Drucker-Prager [40]. …”

Section: Prediction Of Stress-strain Curves and Damage Progression Unmentioning

confidence: 78%

“…An interesting outcome of using DEM is that the transverse compressive failure strains of the RVEs are also obtained whilst they have not been reasonably achieved in previous studies using FEM due to numerical convergence difficulties [7,22,39]. To show the accuracy of the DEM modelling, the results are also compared with two recent FEM models [7,40] in Fig.11. Fig.11 Stress-strain curves of five RVEs under uniaxial compression.…”

Section: Prediction Of Stress-strain Curves and Damage Progression Unmentioning

confidence: 99%

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A DEM model for visualising damage evolution and predicting failure envelope of composite laminae under biaxial loads

Ismail

Yang

2016

Composites Part B: Engineering

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A two dimensional particle model based on the discrete element method (DEM) is developed for micromechanical modelling of fibre reinforced polymer (FRP) composite laminae under biaxial transverse loads. Random fibre distribution within a representative volume element (RVE) is considered for the micromechanical DEM simulations. In addition to predicting the stress-strain curves of the RVEs subjected to transverse compression and transverse shear stresses against the experimental testing results and other numerical modelling results, the DEM model is also able to capture the initiation and propagation of all micro damage events. Fibre distribution is found to more significantly influence the ultimate failure of composite laminae under transverse shear, while it has much less effect on the failure under transverse compression. The failure envelope of composite laminae under biaxial transverse compression and transverse shear is predicted and compared with Hashin and Puck failure criteria, showing a reasonable agreement. The predicted failure envelope is correlated with the damage evolution and the quantitative analysis of failure events, which improves the understanding of the failure mechanisms.

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Section: Prediction Of Stress-strain Curves and Damage Progression Unmentioning

confidence: 78%

Section: Prediction Of Stress-strain Curves and Damage Progression Unmentioning

confidence: 99%

A DEM model for visualising damage evolution and predicting failure envelope of composite laminae under biaxial loads

Ismail

Yang

2016

Composites Part B: Engineering

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“…The failure criterion must thus be able to capture the pressure effect. This can be achieved either by a strain-based criterion assuming the equivalent (plastic) strain at the onset of failure as a function of the stress triaxiality defined by the ratio between the pressure and the von Mises equivalent stress (Yang et al, 2012) or by a stress-based criterion related to the pressure (Melro et al, 2013). In this work, the onset of the failure stage is characterized by a pressure-dependent failure criterion based on stress invariants in order to correctly represent the pressure-sensitive failure process.…”

Section: Failure Modelmentioning

confidence: 99%

A large strain hyperelastic viscoelastic-viscoplastic-damage constitutive model based on a multi-mechanism non-local damage continuum for amorphous glassy polymers

Nguyễn

Lani

Pardoen

et al. 2016

International Journal of Solids and Structures

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A large strain hyperelastic phenomenological constitutive model is proposed to model the highly nonlinear, rate-dependent mechanical behavior of amorphous glassy polymers under isothermal conditions. A corotational formulation is used through the total Lagrange formalism. At small strains, the viscoelastic behavior is captured using the generalized Maxwell model. At large strains beyond a viscoelastic limit characterized by a pressure-sensitive yield function, which is extended from the Drucker-Prager one, a viscoplastic region follows. The viscoplastic flow is governed by a non-associated Perzyna-type flow rule incorporating this pressure-sensitive yield function and a quadratic flow potential in order to capture the volumetric deformation during the plastic process. The stress reduction phenomena arising from the post-peak plateau and during the failure stage are considered in the context of a continuum damage mechanics approach.The post-peak softening is modeled by an internal scalar, so-called softening variable, whose evolution is governed by a saturation law. When the softening variable is saturated, the rehardening stage is naturally obtained since the isotropic and kinematic hardening phenomena are still developing. Beyond the onset of failure characterized by a pressure-sensitive failure criterion, the damage process leading to the total failure is controlled by a second internal scalar, so-called failure variable. The final failure occurs when the failure variable reaches its critical value. To avoid the loss of solution uniqueness when dealing with the continuum damage mechanics formalism, a non-local implicit gradient formulation is used for both the softening and failure variables, leading to a multi-mechanism non-local damage continuum. The pressure sensitivity considered in both the yield and failure conditions allows for the distinction under compression and tension loading conditions. It is shown through experimental comparisons that the proposed constitutive model has the ability to capture the complex behavior of amorphous glassy polymers, including their failure.

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“…The material parameters of the matrix are shown in Table 1. And the equivalent plastic strains at the onset of damage for uniaxial tension and compression are set as 0.05 and 0.5, respectively [14].…”

Section: Fem Modelmentioning

confidence: 99%

Multi-Scale Modeling and Damage Analysis of Composite with Thermal Residual Stress

Han

Guan

et al. 2014

Appl Compos Mater

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In order to analysis thermal residual stress and its influence on the strength of composite, the hierarchical multi scale simulation method is applied. A microscopic computational model of single fiber composite with thermal residual stress is built to research the stress distribution. Then the damage initiation discipline details of unidirectional composite are researched, and the effects of different fiber arrangements on thermal residual stress distribution, damage initiation and the different final failure behaviors of fiber regular distribution and random distribution under tension and compression are researched in details. It shows that in fiber regular arrangement, damage initiation in interface appears evenly and in matrix it appears at somewhere randomly. But in fiber random arrangement, initial damage focuses at the resin pockets between closely packed fibers with both interface and matrix damage. The maximal thermal residual stress in fiber random arrangement model is larger than that in fiber regular arrangement model. And it reaches the normal strength of the interface and thus causing the initiation of interface damage. Also the failure modes of composites under transverse tension and compression with and without residual stress are quite different from each other. The strength and failure path of different RVE and loading are showing respectively in this paper.

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Microscopic failure mechanisms of fiber-reinforced polymer composites under transverse tension and compression

Cited by 200 publications

References 33 publications

A DEM model for visualising damage evolution and predicting failure envelope of composite laminae under biaxial loads

A DEM model for visualising damage evolution and predicting failure envelope of composite laminae under biaxial loads

A large strain hyperelastic viscoelastic-viscoplastic-damage constitutive model based on a multi-mechanism non-local damage continuum for amorphous glassy polymers

Multi-Scale Modeling and Damage Analysis of Composite with Thermal Residual Stress

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