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

Abstract

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.

The effect of incorporation of hybrid silica and cobalt ferrite nanofillers on the mechanical characteristics of glass fiber‐reinforced polymeric composites

“…Many factors can affect test results, such as the fabrication method of the specimens, preparation, handling, storage, test rig design, and experimental technique. [ 55–57 ] The statistical scatter in the experimental test results, that is, coefficient of variation (C.V.), has been obtained as presented in Tables 5‐7. As shown in Table 5, the maximum C.V. for the ultimate tensile strength, Young's modulus, and strain to failure were observed to be 7.87% for F nanocomposite, 21.04% for G composite, and 13.57% for FHSHF nanocomposite, respectively.…”

Interlaminar shear behavior of basalt FRP and hybrid FRP laminates

“…For instance, through the injection of multiwalled carbon nanotube (MWCNT)-epoxy suspensions into stationary glass Eber mats, the interlaminar shear behavior was obviously enhanced. 2,[15][16][17][18] Selmy et al 20,21 studied the variability in the tensile, flexural, in-plane shear, and interlaminar shear properties of unidirectional glass fiber/random glass fiber/epoxy hybrid and non-hybrid composite laminates. They found that hybrid composites have higher ILSS than random composites, and the failure location of the hybrid laminates depends on not only the strength of the interface but also on the strength of the hybrid composite constituents.…”

Potentiality of halloysite nanoclay on crashworthiness performance of polymer composite tubular elements

“…These factors are specimen manufacturing, preparation, handling, storage, test rig design, and experimental technique. 85 Due to the above reasons, CV values of around 25% reflect the accuracy in the results. 86 Selmy et al 85 recorded maximum CV value of 16.8% for his static results.…”

“…85 Due to the above reasons, CV values of around 25% reflect the accuracy in the results. 86 Selmy et al 85 recorded maximum CV value of 16.8% for his static results. In another study, Selmy et al 72 recorded maximum CV value of 43.8% for his dynamic result.…”