Multi-scales modelling of dynamic behaviour for discontinuous fibre SMC composites

Jendli, Zouhaier; Meraghni, Fodil; Fitoussi, Joseph; Baptiste, D.

doi:10.1016/j.compscitech.2007.10.047

Cited by 63 publications

(61 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The current experimental findings on physical aspect of damage are of importance for identifying local damage criteria that would be implemented into a predictive micromechanical model [33,34]. To this end, development of multi-scale constitutive models that include the damage evolution should integrate fiber-matrix interface damage kinetic coupled with the viscous rheology of the polyamide matrix in relation with the PA66/GF30 microstructure.…”

Section: Discussionmentioning

confidence: 99%

In situ damage mechanisms investigation of PA66/GF30 composite: Effect of relative humidity

Arif

Meraghni

Chemisky

et al. 2014

Composites Part B: Engineering

126

View full text Add to dashboard Cite

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. b s t r a c tDamage mechanisms of injection molded polyamide-66/short glass fiber 30 wt% composite (PA66/GF30) were analyzed using in situ SEM mechanical tests on specimens conditioned under three relative humidity contents (RH = 0%, 50% and 100%). The validity of these in situ analyses was confirmed by Xray micro-computed tomography (lCT) observations on tensile loaded specimens. Experimental results demonstrated that relative humidity (RH) conditions influence strongly the damage level and damage mechanisms. Indeed, for specimen with RH = 0%, damage initiation occurs at significantly higher load level than those in RH = 50% and RH = 100% specimens. The higher relative humidity condition also results in higher damage level. Damage chronologies have been proposed as damage initiation in the form of fiber-matrix debonding occurs at fiber ends and more generally at locations where fibers are close to each other due to the generation of local stress concentration (for all studied RH contents), and first fiber breakages occur (RH = 0%). These debonded zones further propagate through fiber-matrix interface (for all studied RH contents), and new fiber breakages develop (RH = 0%). At high relative flexural stress, matrix microcracks appear and grow regardless the RH contents. For RH = 100%, these microcracks are also accompanied by many matrix deformation bands. Subsequently, they lead to the damage accumulation and then to the final failure.

show abstract

Section: Discussionmentioning

confidence: 99%

In situ damage mechanisms investigation of PA66/GF30 composite: Effect of relative humidity

Arif

Meraghni

Chemisky

et al. 2014

Composites Part B: Engineering

126

View full text Add to dashboard Cite

show abstract

“…But this type of estimate simply gives a lower bound to their stiffness and one must define more precisely the effective behavior of completely or partially debonded unidirectional composites. Many works have been devoted to this task, see for instance [6,8,12,13,14,15,16,18,19,21,23,26]. In general, these studies consist in replacing the perfect bond of the interface by some "cohesive law" or simply in removing the fibers when the debonding is complete.…”

Section: Introductionmentioning

confidence: 99%

The homogenized behavior of unidirectional fiber-reinforced composite materials in the case of debonded fibers

Berrehili

Marigo

2014

Math. Mech. Compl. Sys.

View full text Add to dashboard Cite

Abstract. This paper is devoted to the analysis of the homogenized behavior of unidirectional composite materials once the fibers are debonded from (but still in contact with) the matrix. This homogenized behavior is built by an asymptotic method in the framework of the homogenization theory. The main result is that the homogenized behavior of the debonded composite is that of a generalized continuous medium with an enriched kinematics. Indeed, besides the usual macroscopic displacement field, the macroscopic kinematics contain two other scalar fields. The former one corresponds to the displacement of the matrix whereas the two latter ones correspond to the sliding and the rotation of the debonded fibers with respect to the matrix. Accordingly, new homogenized coefficients and new coupled equilibrium equations appear. This problem is addressed in a linear elastic three-dimensional setting.

show abstract

“…The axis of rotational symmetry of the latter coincides with their geometrical axis of symmetry and their mechanical behavior can be characterized by five independent elastic moduli chosen among the axial and transverse Young's moduli, E C A and E C T , the axial and transverse shear moduli, G C A and G C T , the transverse (plane strain for lateral dilatation without axial extension) bulk modulus, K C T and the Poisson's ratios, ν C AT , ν C TA and ν C TT . Damage mechanisms in this type of composites can occur at different levels (matrix, fibers, fiber bundles, interfaces) and they can be taken into account with various ways (Fitoussi et al, 1998;Derrien et al, 2000;Morozov et al, 2003;Jendli et al, 2004Jendli et al, , 2009. In this study, it is chosen to incorporate damage at the glass bundles using a recently developed hybrid phenomenological-micromechanical model (Praud et al, 2017).…”

Section: Involved Constituent Materials and Their Propertiesmentioning

confidence: 99%

Hierarchical micromechanical modeling of the viscoelastic behavior coupled to damage in SMC and SMC-hybrid composites

Anagnostou

Chatzigeorgiou

Chemisky

et al. 2018

Composites Part B: Engineering

Self Cite

View full text Add to dashboard Cite

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. AbstractThe aim of this paper is to study, through a multiscale analysis, the viscoelastic behavior of glass reinforced sheet molding compound (SMC) composites and SMC-hybrid composites mixing two types of bundle reinforcement: glass and carbon fibers. SMC exhibit more than two distinct characteristic length scales, so that a sequence of scale transitions is required to obtain the overall behavior of the composite. An analytical procedure is used consisting of properly selected well-established micromechanical methods like the Mori-Tanaka (MTM) and the composite cylinders (CCM) accounting for each scale transition. After selecting a representative volume element (RVE) for each scale, the material response of any given length scale is described on the basis of the homogenized behavior of the next finer one. This hierarchical approach is appropriately extended to the viscoelastic domain to account for the time dependent overall response of the SMC composite material. The anisotropic damage has been introduced through a micromechanical model considering matrix penny-shape microcrack density inside bundles. The capabilities of the hierarchical modeling are illustrated with various parametric studies and simulation of experimental data for glass-based SMC composites.

show abstract

Multi-scales modelling of dynamic behaviour for discontinuous fibre SMC composites

Cited by 63 publications

References 21 publications

In situ damage mechanisms investigation of PA66/GF30 composite: Effect of relative humidity

In situ damage mechanisms investigation of PA66/GF30 composite: Effect of relative humidity

The homogenized behavior of unidirectional fiber-reinforced composite materials in the case of debonded fibers

Hierarchical micromechanical modeling of the viscoelastic behavior coupled to damage in SMC and SMC-hybrid composites

Contact Info

Product

Resources

About