Stress concentration around a central hole as affected by material nonlinearity in fibrous composite laminated plates subject to in-plane loading

Abu‐Farsakh, Ghazi; Almasri, Amin H.; Qa’dan, Dana H.

doi:10.1515/secm-2013-0125

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…Abu-Farsakh et al. 4 have examined the effects of parameters such as fiber angle orientation, plate length/width ratio, hole diameter/plate width ratio, and hole diameter/plate length ratio on the stress concentration. Not only they worked on linear region, but also they took account of non-linear material effects on the stress concentration, in this study.…”

Section: Introductionmentioning

confidence: 99%

Stress concentration and strength prediction of 2×2 twill weave fabric composite with a circular hole

Özaslan

Yetgin

Acar

2018

Journal of Composite Materials

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Stress concentration and strength prediction of 2 × 2 twill weave carbon fiber reinforced composite specimens with different hole sizes are investigated on numerical and analytical basis. Stress distribution around the hole is obtained using Lekhnitskii’s model together with Tan’s finite width correction factor and also finite element analysis. Validity of Lekhnitskii’s formula together with Tan’s correction is demonstrated for 2 × 2 twill weave composites with different w/d ratios. Tan’s correction factor is compared with finite element analysis results at a characteristic distance away from hole tip where the stresses are important for strength prediction. Applicability of point stress criteria and average stress criteria strength prediction methods for open hole specimens to 2 × 2 twill weave material is demonstrated. The performances of the point stress criteria and average stress criteria methods are compared in the case of eccentric tension loading. All analytical and numerical results are verified by experimental study.

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Section: Introductionmentioning

confidence: 99%

Stress concentration and strength prediction of 2×2 twill weave fabric composite with a circular hole

Özaslan

Yetgin

Acar

2018

Journal of Composite Materials

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“…Abu-Farsakh et al [13] studied the problem of stress-concentration around a central circular hole in fibrous composite laminated plates subject to in-plane tensile loading. The main aim of the research was to investigate the effect of material nonlinearity on stressconcentration and stress-redistribution around the hole.…”

Section: Introductionmentioning

confidence: 99%

Effect of nonlinear material behavior of laminated composite plates with central rectangular hole subjected to out -of- plane loading

2017

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Abstract. The purpose of this paper is to investigate the effect of nonlinear material behavior on four layered, symmetric; angle-ply laminated composite plate with various fiber-orientation angles; T. The plate has a central square-hole and subjected to out-of-plane uniformly distributed load. The effect of Stress Concentration Factor (SCF) resulting from redistribution of in-plane stresses (ıx, ıy, Ĳxy) around the hole was taken into consideration. Square plates with simply supported boundary conditions were considered in the present study. The analysis was carried out utilizing the ANSYS-computer program. The presence of a central hole was found to concentrate the maximum stresses at the corners of the hole. The nonlinear material behavior was found to redistribute the in-plane stresses more reasonably and smoothly around the hole-perimeter and hence resulting in smaller SCF-values.

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“…Raimondo et al [4] developed a three-dimensional phenomenology-based model to study the strain rate effects on elastic and failure properties of composites. Abu-Farsakh and coworkers [5] investigated the stress distributions in laminated composite plates with a central circular hole and having various stacking sequences using finite element method (FEM). Gun and Kose [6] proposed a boundary element method for the prediction of longitudinal modulus of aligned discontinuously fiber reinforced composites.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, Eq. (3), which are then expressed explicitly in terms of surface-averaged fluctuating displacement components through Eqs (5). and(6), and the applications of volume-…”

mentioning

confidence: 99%

Numerical simulation of strain rate effect on the inelastic behavior of metal matrix composites

Chen

Zhai

Zhu

et al. 2017

Science and Engineering of Composite Materials

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The primary goal of this paper is to investigate the combined effects of strain rate and microscopic parameters (fiber off-axis orientation, array pattern and cross-sectional shape) on the mechanical behavior of metal matrix composites (MMCs). To this end, a ratedependent micromechanical model by the combination of finite-volume theory and Bodner-Partom viscoplastic model is developed to analyze the inelastic response of MMCs. In the simulations, the fibers are modeled as linearly elastic while the metal matrix exhibits viscoplasticity. The macroscopic stress-strain response, local stress and strain fields are obtained simultaneously. An acceptable agreement has been found between the model's prediction and finite-element results, which demonstrates the good predictive capabilities of the proposed method. It is concluded that the composite response is strongly affected by strain rate, fiber array pattern and cross-sectional shape in the elastic-plastic region but to a lesser extent in the elastic region. Furthermore, the clustering array provides stiffer response than random and square ones; the square fiber predicts stiffer response than circular and elliptical ones. However, increasing the strain rate will weaken the influence of clustering array and square fibers.

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Stress concentration around a central hole as affected by material nonlinearity in fibrous composite laminated plates subject to in-plane loading

Cited by 4 publications

References 6 publications

Stress concentration and strength prediction of 2×2 twill weave fabric composite with a circular hole

Stress concentration and strength prediction of 2×2 twill weave fabric composite with a circular hole

Effect of nonlinear material behavior of laminated composite plates with central rectangular hole subjected to out -of- plane loading

Numerical simulation of strain rate effect on the inelastic behavior of metal matrix composites

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