Rheological characterization of continuous fiber—reinforced viscous fluid

Abadi, Mohammad Tahaye

doi:10.1016/j.jnnfm.2010.05.001

Cited by 4 publications

(2 citation statements)

References 25 publications

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“…The micromechanical results can be used to derive the parameters of viscoelastic constitutive model considered for elastomeric composite. It was shown that [5] composites reinforced with unidirectional fiber can be modeled at finite strain by orthotropic constitutive law. The instantaneous strain energy of orthotropic viscoelastic material can be expressed as a function of seven independent principal invariants defined by left Cauchy-Green tensor, unit vectors considered along and normal to fiber direction, designated by a (1) and a (2) , respectively.…”

Section: Discussionmentioning

confidence: 99%

Viscoelastic Characterization of Fiber-Reinforced Elastomeric Composites at Finite Strain

Abadi

2010

AMR

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A viscoelastic model is developed to describe the mechanical response of fiber-reinforced elastomeric composites at large deformation. A continuum approach is used to model the macroscopic mechanical behavior of elastomeric materials reinforced with unidirectional fibers, in which the resin and fibers are regarded as a single homogenized anisotropic material. The anisotropic viscoelastic constitutive model is developed considering transient reversible network theory. An efficient computational algorithm based on micromechanical modeling is proposed to relate the material parameters of constitutive model to the mechanical properties of composite constituents at finite strain. The microstructure is identified by a representative volume element (RVE) and it is subjected to large deformation with considering the conformity of opposite boundaries. The material parameters of the viscoelastic constitutive law are determined based on the response of heterogeneous microstructure which is examined under different loading conditions.

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Section: Discussionmentioning

confidence: 99%

Viscoelastic Characterization of Fiber-Reinforced Elastomeric Composites at Finite Strain

Abadi

2010

AMR

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“…For any light source, the final energy absorbed in the second substrate is defined according to the incident ray density. The heat source generated is defined as an integral over the wave length spectra [17][18][19][20][21]:…”

Section: Temperature Profile Modelingmentioning

confidence: 99%

Modelling of Laser Welding Process on Thermoplastic Composites

Cosson

2015

KEM

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Thermoplastics composites for structural applications are under growing development from the aerospace (carbon fibers with PEI, PPS or PEEK matrices mainly) to the automotive industry (glass and carbon fibers with PP, PA). The plastic deformation they can provide and the assembly facilities through welding techniques are well appreciated. Among the available welding technics, laser offers the possibility to assemble materials in a precise and localized manner and can be easily automated. However, due to the presence of continuous fibers at a high fiber volume fraction, propagation of the laser energy through the composite that present local variation of fiber volume fraction is not as straight forward as in a homogeneous material. Modelling of the laser welding of a thermoplastic/continuous glass fiber is considered here. The study takes into account the microstructure of the composite in order to evaluate changes in local energy absorption and diffusion directly linked with the thickness. Modelling of the welding process is developed from the representation of the moving laser beam. The beam propagation through the composite thickness is considered thanks to the ray tracing method. The proposed method is able to optimise the welding process in function of the microstructure and the material properties of the welded parts.

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