Micromechanics for a long fibre reinforced composite model with a functionally graded interphase

Sabiston, Trevor; Mohammadi, Mohsen; Cherkaoui, Mohammed; Lévesque, Julie; Inal, Kaan

doi:10.1016/j.compositesb.2015.08.070

Cited by 30 publications

(6 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Overall, the model was successful, being able to predict the deformation of the 25% volume fraction specimens with at most a 3.5% error (in reference to failure strain and failure force), and the 45% volume fraction specimens with at most a 6.6% error. A micromechanics model as developed earlier for long fibre-reinforced composites by Sabiston et al [43,45] based on the random characteristics of the SMC composites can help to capture these errors mainly for the longitudinal and transverse 45% volume fraction samples.…”

Section: Remarks On the Accuracy Of The Resultsmentioning

confidence: 99%

“…Shin and Wang [41] further improved the cohesive zone model to predict the notch strength and damage evolution of anisotropic composites, while Rami [42] proposed a micromechanical cohesive zone model based on a 3D representative unit cell. Sabiston et al [43] proposed a model based on functionally graded interface theory [44] in order to overcome the computational inefficiency of cohesive zone theory. They have used the model to predict the quasi-static and moderate strain rate behaviour of composites [45].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Finite Element Analysis and Experimental Characterisation of SMC Composite Car Hood Specimens under Complex Loadings

2018

Self Cite

View full text Add to dashboard Cite

Composite materials have recently been of particular interest to the automotive industry due to their high strength-to-weight ratio and versatility. Among the different composite materials used in mass-produced vehicles are sheet moulded compound (SMC) composites, which consist of random fibres, making them inexpensive candidates for non-structural applications in future vehicles. In this work, SMC composite materials were prepared with varying fibre orientations and volume fractions (25% and 45%) and subjected to a series of uniaxial tensile and flexural bending tests at a strain rate of 3 × 10−3 s−1. Tensile strength as well as failure strain increased with the increasing fibre volume fraction for the uniaxial tests. Flexural strength was found to also increase with increasing fibre percentage; however, failure displacement was found to decrease. The two material directions studied—longitudinal and transverse—showed superior strength and failure strain/displacement in the transverse direction. The experimental results were then used to create a finite element model to describe the deformation behaviour of SMC composites. Tensile results were first used to create and calibrate the model; then, the model was validated with flexural experimental results. The finite element model closely predicted both SMC volume fraction samples, predicting the failure force and displacement with less than 3.5% error in the lower volume fraction tests, and 6.6% error in the higher volume fraction tests.

show abstract

Section: Remarks On the Accuracy Of The Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis and Experimental Characterisation of SMC Composite Car Hood Specimens under Complex Loadings

2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Li et al [276] conducted a comprehensive study to investigate the influence of size, interphase thickness, and inclusion shape on the enhancement mechanism of composites, see [277] for carbon nanotube composites. Further analytical studies on inhomogeneous interphases include [278][279][280][281][282][283][284][285][286].…”

Section: Analyticalmentioning

confidence: 99%

Homogenization of Composites with Extended General interfaces: Comprehensive Review and Unified Modeling

Firooz

Steinmann

Javili

2021

Applied Mechanics Reviews

View full text Add to dashboard Cite

Interphase regions that form in heterogeneous materials through various underlying mechanisms such as poor mechanical or chemical adherence, roughness, and coating, play a crucial role in the response of the medium. A well- established strategy to capture a finite-thickness interphase behavior is to replace it with a zero-thickness interface model characterized by its own displacement and/or traction jumps, resulting in different interface models. The contributions to date dealing with interfaces commonly assume that the interface is located in the middle of its corresponding interphase. We revisit this assumption and introduce a universal interface model, wherein a unifying approach to the homogenization of heterogeneous materials embedding interfaces between their constituents is developed. The proposed novel interface model is universal in the sense that it can recover any of the classical interface models. Next, via incorporating this universal interface model into homogenization, we develop bounds and estimates for the overall moduli of fiber-reinforced and particle-reinforced composites as functions of the interface position and properties. Furthermore, we elaborate on the computational implications of this interface model. Finally, we carry out a comprehensive numerical study to highlight the influence of interface position, stiffness ratio and interface parameters on the overall properties of composites, where an excellent agreement between the analytical and computational results is observed. The developed interface-enhanced homogenization framework also successfully captures size effects, which are immediately relevant to emerging applications of nano-composites due their pronounced interface effects at small scales.

show abstract

“…Different techniques have been used to estimate the effective properties of composites materials; the twoscale asymptotic expansion method [19,20] was applied by Galka et al [21] to compute macro behavior in thermo-piezoelectric composites. Further research activities have focused on studies on the micro-scale, where different approaches [22][23][24][25][26][27][28][29][30] have been considered for describing perfect and imperfect adhesion with a uniform interface between the constituents. A mathematical structure was developed to calculate the mechanical behavior of inhomogeneous media under the statement of an ordered microstructure with perfect contact.…”

Section: Introductionmentioning

confidence: 99%

Behavior of piezoelectric layered composites with mechanical and electrical non-uniform imperfect contacts

et al. 2020

View full text Add to dashboard Cite

In this work, the two scales asymptotic homogenization method (AHM) is applied for determining the effective coefficients of laminated piezoelectric composite with periodic structure under nonuniform electrical and mechanical imperfect contact conditions. The analytical expressions of the local problems and the effective coefficients as result of the AHM are explicitly described. The constituent materials have properties belonging to 2 mm symmetry point group. Numerical values of the effective coefficients are reported and compared with limit cases, where perfect and uniform imperfect contact conditions are considered. Good agreements are found for these comparisons. Hence, the effect of the nonuniform imperfect contact conditions on the effective coefficients can be analyzed.

show abstract

Micromechanics for a long fibre reinforced composite model with a functionally graded interphase

Cited by 30 publications

References 44 publications

Finite Element Analysis and Experimental Characterisation of SMC Composite Car Hood Specimens under Complex Loadings

Finite Element Analysis and Experimental Characterisation of SMC Composite Car Hood Specimens under Complex Loadings

Homogenization of Composites with Extended General interfaces: Comprehensive Review and Unified Modeling

Behavior of piezoelectric layered composites with mechanical and electrical non-uniform imperfect contacts

Contact Info

Product

Resources

About