Micromechanical modeling of the progressive failure in short glass–fiber reinforced thermoplastics – First Pseudo-Grain Damage model

Kammoun, S.; Doghri, Issam; Brassart, Laurence; Delannay, Laurent

doi:10.1016/j.compositesa.2015.02.017

Cited by 56 publications

(21 citation statements)

References 43 publications

(40 reference statements)

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“…Accurate description of the SCFR-PEEK mechanical impact behavior needs to take into account the preferential alignment of fibers in the injection molding direction, IFD [8,33]. The results of experimental testing in this study (Fig.…”

Section: Modelling Behavior Of Peek Compositementioning

confidence: 98%

“…Experimental observations of some authors have shown no significant influence on mechanical properties of short fiber reinforced thermoplastic composite under low strain rates demonstrating elasto-plastic behavior [14]. For high strain rates experimental stress-strain curves showed an elasto-viscoplastic behavior although this dependence is neglectable for temperatures near to glass transition [15,16].…”

Section: Introductionmentioning

confidence: 97%

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Investigation of mechanical impact behavior of short carbon-fiber-reinforced PEEK composites

Garcia‐Gonzalez

Rodríguez-Millán

Rusinek³

et al. 2015

Composite Structures

108

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Investigation of mechanical impact behavior of short carbon-fiber-reinforced PEEK composites, Composite Structures (2015), doi: http://dx.Abstract. This paper describes the results of an experimental and numerical investigation of the impact behavior of short carbon fiber reinforced polyether-ether-ketone (SCFR PEEK) composites. The biocompatibility of PEEK and its short fiber composites, their rapid processing by injection molding and suitability for modern imaging have supported technological advances in prosthetic implants used in orthopedic medicine. Surgical implants, including hip and cranial implants, can experience clinically significant impact loading during medical installation and useful life. While the incorporation of short fibers in a thermoplastic matrix can produce significant improvements in stiffness and strength, it can also cause a marked reduction in ductility, making study of their energy absorption capability essential. In this work, the mechanical impact behavior of PEEK composites reinforced with polyacrylonitrile (PAN) short carbon fibers 30 % in weight is compared with unfilled PEEK. The perforation tests conducted covered an impact kinetic energy range from 21 J to 131 J, equivalent to the range observed in a fall, the leading cause of hip fractures. Energy absorption capability, damage extension and failure mechanism have been quantified and reported. A numerical modeling that includes homogenization of elastic material and 1 anisotropic damage is presented and validated with experimental data. At all impact energies, SCFR PEEK composites showed a brittle failure and their absorption energy capability decreases drastically in comparison with unfilled PEEK.

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Section: Modelling Behavior Of Peek Compositementioning

confidence: 98%

Section: Introductionmentioning

confidence: 97%

Investigation of mechanical impact behavior of short carbon-fiber-reinforced PEEK composites

Garcia‐Gonzalez

Rodríguez-Millán

Rusinek³

et al. 2015

Composite Structures

108

View full text Add to dashboard Cite

show abstract

“…The main problem of such a material is that the microstructure can be really complex, and, to our knowledge there are not so many homogenization methods available to describe such a microstructure. Previous papers usually use the Mori Tanaka estimates (Kammoun et al 2015, Despringre et al 2016 but, as we will see in the section 2.2.3 of this paper, it may give too compliant estimates. To handle this, we use a full field method based on Fast Fourier Transforms Suquet 1994, Moulinec andSuquet 1998) which has the advantage of being meshless (unlike the finite elements methods) thus evading meshing problems (or tremendous amount of calculation time to avoid the latter).…”

Section: Introductionmentioning

confidence: 96%

“…These methods integrate directly the effects of the microstructure parameters and the constitutive law of each constituent in the estimated law of the composite. This can be achieved in an analytical way in the case of mean field methods (Kammoun et al 2015, Despringre et al 2016 or given as a result of numerical simulations in the case of full field methods (Moulinec and Suquet 1994, Moulinec and Suquet 1998, Dirrenberger et al 2014. In the case of linear viscoelasticity, by using the correspondence principle, (Lévesque et al 2007, Ricaud andMasson 2009), authors find some estimates in closed form for the macroscopic laws of isotropic composites with microstructures following the Hashin Shtrikman lower bound.…”

Section: Introductionmentioning

confidence: 99%

Effective viscoelastic behavior of short fibers composites using virtual DMA experiments

Burgarella

Maurel-Pantel

Lahellec

et al. 2018

Mech Time-Depend Mater

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May it be for environmental or economic reasons, mass reduction has become one of the main goals of mechanical conceptions. Short fiber Thermoplastics composites is an interesting possibility since they present a good compromise between relatively easy process and mechanical properties. The aim of this work is to estimate and model the viscoelastic behavior at small strain of PC Lexan/Glass fiber composites.To meet this goal, a full field homogenization method based on solving the boundary problem through FFT is used. Virtual DMA experiments are used to build the master curve of the composite. They are later used to identify a macroscopic model for transverse isotropic short fiber composites. Finally, a meta-model is built to estimate the behavior of the composite at any given fiber volume ratio.

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“…Accurate evaluation of mechanical performance and durability of structural moldings requires consideration of process‐induced anisotropy and the possible existence of micrometric porosity. In this context, integrative simulation chains (ISC) are developed to integrate forming process in finite element computations . However, quantitative estimation of mechanical properties is still inaccurate particularly in areas where microstructure heterogeneities are the least predictable such as weld lines .…”

Section: Introductionmentioning

confidence: 99%

Large‐Scale X‐Ray Microtomography Analysis of Fiber Orientation in Weld Line of Short Glass Fiber Reinforced Thermoplastic and Related Elasticity Behavior

Ayadi

Nouri

Guessasma

et al. 2016

Macro Materials & Eng

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Large‐scale X‐ray microcomputed tomography (μ‐CT) is used to investigate microstructural features of weld lines in a short glass fiber reinforced polymer. The main originality of this work is related to the evaluation of local structural and mechanical characteristics in zones of unmastered heterogeneities. Complete and incomplete injection molded plates are considered to investigate weld lines with and without process‐induced porosity. Using a helical scanning trajectory, the full 3D microstructure is obtained at centimetric scale to cover a large zone including first contact between colliding fronts at a voxel size of 3 μm. Microstructure analyses show that weld line area is ill‐ordered at the fiber and structure length scales. Near the first contact point, fiber orientations show the signature of vortexes, which mark the presence of repulsive forces. The presence of micrometric porosity is only confirmed in incomplete plates. μ‐CT images are used as inputs to create a full‐scale finite element model for assessing strain localization. Predicted principal strains are compared to digital image correlation measurements performed during uniaxial tensile tests. Full‐scale modeling combined to 3D high‐resolution imaging proves high potential to correlate local fiber heterogeneities with strain localization effects.

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Micromechanical modeling of the progressive failure in short glass–fiber reinforced thermoplastics – First Pseudo-Grain Damage model

Cited by 56 publications

References 43 publications

Investigation of mechanical impact behavior of short carbon-fiber-reinforced PEEK composites

Investigation of mechanical impact behavior of short carbon-fiber-reinforced PEEK composites

Effective viscoelastic behavior of short fibers composites using virtual DMA experiments

Large‐Scale X‐Ray Microtomography Analysis of Fiber Orientation in Weld Line of Short Glass Fiber Reinforced Thermoplastic and Related Elasticity Behavior

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