An improved analytical model for shear modulus of fiber reinforced laminates with damage

Salavatian, M.; Smith, Lloyd

doi:10.1016/j.compscitech.2014.09.015

Cited by 9 publications

(9 citation statements)

References 13 publications

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“…Salavatian and Smith [1,2] proposed an experimental method to measure material stiffness degradation due to matrix damage. A modified Iosipescu coupon was designed to study the evolution of shear and transverse damage.…”

Section: Experimental Workmentioning

confidence: 99%

“…The classical approach toward material degradation modeling in fiber reinforced composite materials describes material stiffness as a function of crack density. There are different analytical, semi-analytical and numerical models which focus on these solutions [1,2]. Another approach describes damage as a macroscopic state variable and defines material degradation in the framework of continuum damage mechanics [3].…”

Section: Introductionmentioning

confidence: 99%

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An investigation of matrix damage in composite laminates using continuum damage mechanics

Salavatian

Smith

2015

Composite Structures

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Section: Experimental Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An investigation of matrix damage in composite laminates using continuum damage mechanics

Salavatian

Smith

2015

Composite Structures

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“…Nuismer et al [13] adopted the shear lag model and defined transverse and shear damage as an internal state variable representing the lamina damage state directly. Salavatian et al [14] developed the improved shear damage evolution model for fiber-reinforced laminates and considered the effect of matrix cracks on transverse and shear damage evolution. Yun et al [15] proposed the CDM model with the introduction of the crack direction parameter, which has the capability to predict the initiation and direction of crack propagation.…”

Section: Introductionmentioning

confidence: 99%

A Damage Model Reflecting the Interaction between Delamination and Intralaminar Crack for Failure Analysis of FRP Laminates

Yun¹,

Kwak²,

Wang

et al. 2019

Applied Sciences

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In this paper, a progressive damage model reflecting the interaction between delamination and intralaminar crack is developed to predict fracture behaviors and the ultimate load-bearing ability of the fiber-reinforced polymer laminates subject to quasi-static load. Initiation and evolution of intralaminar crack in composites are modeled using a continuum damage mechanics model, which has the capability to reliably predict the discrete crack direction by introducing the crack direction parameter while analyzing the multi-failure of FRP composites. Delamination is modeled using a cohesive zone method with the mixed bilinear law. When the continuum damage model and cohesive zone model are used together, the interactive behavior between multiple failure mechanisms such as delamination induced by matrix cracking often seen in the failure of composite laminates is not generally captured. Interaction between delamination and intralaminar crack in FRP composite structures is investigated in detail and reflected in a finite element analysis in order to eliminate the drawbacks of using both models together. Good agreements between numerical results and experimental data are obtained.

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“…Analogous models 2 for the shear modulus reduction have been developed; however, these models define shear modulus independent of the transverse stress, and have not been experimentally verified.…”

Section: Introductionmentioning

confidence: 99%

“…Salavatian and Smith 1,2,11,12 proposed a slotted coupon (described in the following section) to study the evolution of the shear and transverse damage and their mutual effects. The layup and coupon geometry were selected to control the severity of damage and allow the measurement of shear and transverse stiffness degradation experimentally.…”

Section: Introductionmentioning

confidence: 99%

A novel experimental technique for biaxial testing of a composite laminate with matrix damage

Salavatian

Smith

2015

Journal of Composite Materials

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Matrix damage, in the form of cracks parallel to the fiber, is a common failure mode for composite laminates, yet little is known concerning the associated shear modulus degradation. This study proposes a novel experimental technique to study shear modulus degradation under biaxial loading. An Iosipescu coupon was modified that induced transverse tension and compression loads while applying shear loading. The axial loads were induced using unbalanced layups with coupled normal–shear response. An analytical, closed-form solution was generalized to include unbalanced layups under a shear loading boundary condition. It was observed that the shear modulus degradation depends on the normal stress acting on the matrix transverse cracks. While compressive normal stress increased the effective shear modulus, the tension normal stress reduced the shear modulus, compared to pure shear loading.

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An improved analytical model for shear modulus of fiber reinforced laminates with damage

Cited by 9 publications

References 13 publications

An investigation of matrix damage in composite laminates using continuum damage mechanics

An investigation of matrix damage in composite laminates using continuum damage mechanics

A Damage Model Reflecting the Interaction between Delamination and Intralaminar Crack for Failure Analysis of FRP Laminates

A novel experimental technique for biaxial testing of a composite laminate with matrix damage

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