Interlaminar shear behavior of unidirectional glass fiber (U)/random glass fiber (R)/epoxy hybrid and non-hybrid composite laminates

Selmy, A.I.; Elsesi, A.R.; Azab, N.A.; El‐baky, Marwa A. Abd

doi:10.1016/j.compositesb.2012.01.031

Cited by 44 publications

(25 citation statements)

References 12 publications

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“…This epoxy was used by different researchers. [ 36–39 ] Table 1 shows the properties of glass fiber and matrix. Halloysite clay nanotubes (HCNTs) were supplied by Sigma‐Aldrich Co. Ltd. (United Kingdom) (Figure 1B).…”

Section: Experimental Workmentioning

confidence: 99%

Experimental study on the improvement of mechanical properties of GLARE using nanofillers

El‐baky

Attia

2020

Polymer Composites

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The present study investigates the effect of halloysite clay nanotubes (HCNT S) on the mechanical properties of glass reinforced aluminum laminate (GLARE) as a very popular fiber metal laminate (FML). GLARE (3/2) with quasi-isotropic lay-up, [Al/[(0 /90)/(45 /−45)]s/Al/[(0 /90)/(45 /−45)]s/Al], filled with different wt% ofHCNTs (0, 0.25, 0.5, 1, 2, and 3 wt%) were fabricated using hand lay-up followed by compression molding. Tensile, flexural, and impact properties of the fabricated GLAREs were evaluated. The failure of the specimens was examined using field emissionscanning electron microscope (FE-SEM), energy-dispersive X-ray spectroscopy (EDX) and visual inspection. Test results demonstrated that the incorporation of HCNTs improves the mechanical properties of GLARE. Among the studied wt%, the inclusion of 1 wt% of HCNTs to GLARE leads to maximum improvements of 35.67%, 8.50%, 28.85%, 50.47%, 50.27%, 30.43%, and 51.52% in tensile strength, tensile strain, Young's modulus, modulus of toughness, flexural strength, flexural strain, and impact strength, respectively, was attained by adding 1 wt% of HCNTs to GLARE compared to pristine GLARE. Meanwhile, increasing HCNT S content to 3 wt% reverse the trend. FESEM showed that, HCNT S are well dispersed in epoxy. However, a higher weight fraction of HCNT S in epoxy, that is, 3 wt% leads little agglomerations.

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Section: Experimental Workmentioning

confidence: 99%

Experimental study on the improvement of mechanical properties of GLARE using nanofillers

El‐baky

Attia

2020

Polymer Composites

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“…Selmy et al. 92–94 studied the tensile, interlaminar and bending properties of glass/epoxy hybrids of unidirectional and randomly oriented fibres. Relative proportions and stacking sequences within a hybrid were examined.…”

Section: Hybrid Fibre Architecturesmentioning

confidence: 99%

Mechanical characterisation and modelling of randomly oriented strand architecture and their hybrids – A general review

Visweswaraiah

Selezneva

Lessard

et al. 2018

Journal of Reinforced Plastics and Composites

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A comprehensive review of the mechanical characterisation and modelling of randomly oriented strand material architecture and their hybrids with laminates is presented. Randomly oriented strand composites are long discontinuous fibre systems that exhibit excellent formability characteristics and stiffness properties comparable to quasi-isotropic laminates, allowing their use in the manufacture of intricate geometric parts for automotive and aerospace industries. Randomly oriented strand architecture complements out-of-autoclave methods such as compression moulding, thermostamping and resin-transfer moulding leading to cost-reduction. Their applicability is limited to non-structural and low-load bearing applications due to their low strength properties. Continuous fibre aerospace preforms exhibiting excellent mechanical performance possess low formability characteristics and are confined to simple shell-like geometries with minimal curvatures, while incurring high-costs and long manufacturing times. Hybridisation of randomly oriented strand and with other material architectures represents trade-off solutions of formability and performance characteristics often yielding synergistic effects. Seemingly simple, randomly oriented strand architecture is a complex material system that poses several structural and process challenges. This work categorises the pertinent research work from the literature on the mechanical characterisation into the framework of a formal characterisation environment of composite structures that includes the coupon, the part and structural levels. The manufacturing, dispersion methods and measurement techniques are qualitatively assessed with reference to the mechanical properties. The discussion on modelling involves the identification of crucial characteristics of significant analytical and numerical modelling techniques devised for the prediction of the mechanical behaviour of randomly oriented strand composites and their hybrids. Emphasis is on the methods of stiffness and strength prediction. Our perspectives on the effective use of randomly oriented strand composites and their hybrids are discussed. Process characterisation and process modelling of randomly oriented strand composites and their hybrids are beyond the scope of this article.

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“…5 are fabricated using hand lay-up technique [7][8][9] giving a laminate of thickness equal to 5.5 AE 0.2 mm, where 'R' refers to random lamina which consists of random glass fiber/ epoxy and 'U' the unidirectional lamina which consists of unidirectional glass fiber/epoxy.…”

Section: Introductionmentioning

confidence: 99%

Statistical analysis of monotonic mechanical properties for unidirectional glass fiber (U)/random glass fiber (R)/epoxy hybrid and non-hybrid polymeric composites

Selmy

Azab

El‐baky

2013

Journal of Composite Materials

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The aim of this article is to study the variability in tensile, flexural, in-plane shear, and interlaminar shear properties of unidirectional glass fiber (U)/random glass fiber (R)/epoxy hybrid and non-hybrid composite laminates. Six kinds of laminated composites of average thickness 5.5 AE 0.2 mm and total fiber volume fraction (V fT ) ¼ 37% were manufactured using hand lay-up technique and tested under tensile, bending, in-plane shear, and interlaminar shear loading conditions. The failure modes of all test specimens have been recorded and discussed. Two-parameter Weibull distribution function was used to statistically analyze the composite samples experimental results. Weibull graphics were plotted for each sample using experimental monotonic mechanical properties results. The Weibull distribution has also been employed to show both the failure probabilities as well as the scatter in the experimental results for the above mentioned composites. The obtained failure probability graphs for the manufactured composites under different static loading conditions are important tools for helping the designers to understand and choice the suitable material for the required design and development.

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Interlaminar shear behavior of unidirectional glass fiber (U)/random glass fiber (R)/epoxy hybrid and non-hybrid composite laminates

Cited by 44 publications

References 12 publications

Experimental study on the improvement of mechanical properties of GLARE using nanofillers

Experimental study on the improvement of mechanical properties of GLARE using nanofillers

Mechanical characterisation and modelling of randomly oriented strand architecture and their hybrids – A general review

Statistical analysis of monotonic mechanical properties for unidirectional glass fiber (U)/random glass fiber (R)/epoxy hybrid and non-hybrid polymeric composites

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