Experimental–numerical study on minimizing impact induced damage in laminated composites under low-velocity impact

Pashmforoush, Farzad; Fotouhi, Mohamad; Sarhan, Ahmed A.D.

doi:10.1177/0731684417737166

Cited by 10 publications

(4 citation statements)

References 26 publications

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“…The BVID is not visible to naked eyes and sometimes difficult to detect under non-destructive inspection. These BVID severely reduce the FRP composites residual strength by growing throughout the structure with time, resulting in premature, sudden and catastrophic failure of the FRP structures (Farooq and Myler, 2015; Pashmforoush et al., 2018; Zhang et al., 2013). Furthermore, along with the BVID, the poor through-thickness strength further increases the FRP composites vulnerability (Caminero et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

Effect of ply position switching in quasi-isotropic glass fibre reinforced polymer composite subjected to low velocity impact

Singh

Mahesh

2022

International Journal of Damage Mechanics

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This paper reports the influence of woven (0°/90°) and (±45°) lamina position interchanging about the midplane in an eight-layered quasi-isotropic glass fibre reinforced polymer (GFRP) composite under low velocity impact (LVI). In order to fabricate GFRP composite, two lamina orientations as (0°/90°) (referred as ‘a’) and (±45°) (referred as ‘c’) arranged in different stacking sequences. Three number of sample groups as (i) sandwiched ([aacc]S and [ccaa]S) (ii) intercalated ([acca]S and [caac]S) and (iii) alternate ([acac]S and [caca]S) resulted in six number of stacking sequences. The drop weight impact tests are performed at two incident velocities as 1.5 and 4 m/s. The corresponding impact energies generated are 11.39 and 81.05 J, respectively. The impact velocity 1.5 m/s created the barely visible impact damage (BVID) in the GFRP composite, while the impact velocity 4 m/s perforated the GFRP composite. The experimental results showed that the intercalated laminate design with four mismatching interfaces (i.e., [acca]S), offered better impact resistance than two other designs with two and six angle mismatching interfaces. It is also perceived that the impact response (maximum peak load, maximum impact energy and minimum impactor displacement) was independent of the number of angles of mismatching interfaces. Moreover, low velocity impact response of a quasi-isotropic GFRP composite depends on the balanced lamina position about the midplane in the laminate. Experimental results for maximum peak load, maximum energy absorption and laminate displacement proved the significance of conventional designing methodology. Further, the impactor displacement value at maximum peak load and the landing displacement value of the descending portion of the force-displacement curve after reaching the maximum peak load proved to be a practical approach along with the use of determinant of the bending stiffness matrix in determining the better performing stacking sequences for a quasi-isotropic GFRP composite made of (0°/90°) and (±45°) plies under LVI.

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Section: Introductionmentioning

confidence: 99%

Effect of ply position switching in quasi-isotropic glass fibre reinforced polymer composite subjected to low velocity impact

Singh

Mahesh

2022

International Journal of Damage Mechanics

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“…Optimum stacking sequences for laminated composites were studied by Pashmforoush et al in order to decrease the effect of failure at low‐speed impact using genetic‐algorithm‐based optimization method. Saeedifar et al considered the inter‐ and intra‐laminar damage in epoxy/carbon composites under quasi‐static indentation loading based on clustering methods.…”

Section: Introductionmentioning

confidence: 99%

Mechanical characterization of polycarbonate reinforced with nanoclay and graphene oxide

2019

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In this research, the effect of organic nanoclay (NC) Closite 20A and graphene oxide (GO) on the compressive, tensile, and three-point bending behavior of polycarbonate (PC) nanocomposites is investigated. The nanocomposite samples are prepared based on injection molding and the masterbatch technique is used for better dispersion of filler in the matrix. The NC masterbatch is made of direct method by the twin-screw extruder device and the GO masterbatch by the solvent method. The results showed that the presence of nanoparticles in the composite improves the elastic modulus, flexural modulus, compressive and tensile yield stress. The best weight fractions between the considered values for PC/NC and PC/GO were 1% and 0.6%, respectively. Higher fractions lead to the formation of agglomerate and degradation of the nanocomposite. Additionally, it was found that the volume change in plastic deformation for thermoplastics was considerable and the assumption of non-dependent potential flow for PC nanocomposites was more appropriate. For simulating the mechanical behavior of PC nanocomposite, the extended Drucker-Prager (EDP) material model was designated and its coefficient were determined by minimizing the difference between the force-displacement curves obtained from three-point bending test and predicted from numerical simulation using the surrogate method. POLYM. COMPOS., 40:3947-3959, 2019.

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“…Ćwik et al [4] believed that further research is required in deeply understanding the importance of various parameters such as wave speeds and others, as well as the experimental data is crucial in validation of the numerical models subsequently used for such parametric investigation. On similar account, an experimentally validated FEM-based numerical analysis was performed by Pashmforoush et al [16] on laminated fiber reinforced polymer (FRP) composites under low-velocity impact in an effort to minimize the damage. Such tensile stress-strain characterization of the advanced engineered composite materials [13] is essential in design of the members reinforced with it under quasistatic as well as dynamic loading conditions.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigations on dynamic behavior of CFRP laminates

et al. 2019

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Increased application of carbon fiber reinforced polymer (CFRP) composites to resist blast loadings necessitated investigating their dynamic behavior. It requires characterization of the CFRP laminates at high strain rates using split Hopkinson pressure bar or comparable device. In this investigation, tensile properties of the CFRP laminates subjected to high strain rates are studied experimentally and numerically. Experimental evaluation of tensile properties of the CFRP laminates using the Hopkinson bar is a tedious, time consuming, and costly exercise. Hence, upon conducting limited experimental evaluation, a numerical model is developed to characterize these composites at high strain rates. The developed numerical model of the Hopkinson bar technique is validated against the results obtained from the experiments conducted using crossbow system on the CFRP laminates. Full-scale tensile stress-strain curves are developed to study the effect of the strain rate on the ultimate tensile strength, elastic modulus, and energy absorption capacity of the CFRP laminates. It is observed that the CFRP laminates are sensitive to the strain rates and their ultimate tensile strength and energy absorption increases with the increase in the strain rate. Moreover, the effect of variation in thickness and length to width ratio for a constant stress pulse is insignificant.

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Experimental–numerical study on minimizing impact induced damage in laminated composites under low-velocity impact

Cited by 10 publications

References 26 publications

Effect of ply position switching in quasi-isotropic glass fibre reinforced polymer composite subjected to low velocity impact

Effect of ply position switching in quasi-isotropic glass fibre reinforced polymer composite subjected to low velocity impact

Mechanical characterization of polycarbonate reinforced with nanoclay and graphene oxide

Experimental and numerical investigations on dynamic behavior of CFRP laminates

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