Experimental and numerical behaviors of GFRP laminates under low velocity impact

Yalkın, Hüseyin E; Karakuzu, Ramazan; Alpyıldız, Tuba

doi:10.1177/0021998320906871

Cited by 16 publications

(24 citation statements)

References 19 publications

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“…OPTION = 9 is based on the fracture model in the viscous material model *MAT_COHESIVE_MIXED_MODE. The principle is shown in Equation (1):

where

is the normal stress,

is the shear stress, NFLS is the normal interlaminar strength, and SFLS is the shear interlaminar strength [ 19 ]. In the load–displacement curve, this option is feasible for obtaining similar results with coarse meshes as with fine meshes.…”

Section: Problem Descriptionmentioning

confidence: 99%

Simulation Analysis of Delamination Damage for the Thick-Walled Composite-Overwrapped Pressure Vessels

Fang

Wang

2022

Materials

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In order to verify the delamination damage occurring in thick-walled composite-overwrapped pressure vessels, firstly, for composite delamination damage, a composite laminate model was established. Model I and model II delamination failure processes of composite structures were simulated and verified based on a tiebreak contact algorithm for different mesh sizes, respectively, and the approximate equivalent results were achieved by correcting the inter-ply strength. Then, for in-plane damage to composite materials, the elastic–plastic process was verified by selecting a progressive damage model, with quasistatic nonlinear tensile shear of sample specimens as an example. Further, under the purpose of generality and simplicity, the location of the first occurrence of delamination failure was simulated and analyzed with the tiebreak contact algorithm and a reasonable mesh size, using quasistatic loading of a thick composite-overwrapped pressure vessel cylindrical section as an example. The results showed that delamination occurred at approximately the center, which is in general agreement with the experimentally observed phenomenon. On this basis, the locations of the first significant delamination phenomena in composite-overwrapped vessels under three different ratios of plus or minus 45-degree layup angles were predicted. Finally, the differences in structural strength between the single laying methods and the combined laying method were compared. The results showed that the ratio of 50% had a higher modulus value than a pure 0° ply, but too large a ratio was detrimental to the improvement of structural properties.

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“…OPTION = 9 is based on the fracture model in the viscous material model *MAT_COHESIVE_MIXED_MODE. The principle is shown in Equation (1):

where

is the normal stress,

Section: Problem Descriptionmentioning

confidence: 99%

Simulation Analysis of Delamination Damage for the Thick-Walled Composite-Overwrapped Pressure Vessels

Fang

Wang

2022

Materials

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“…Plastic deformation modes are typically quite comparable to those produced by quasi-static loading for low velocity impacts. 28,29…”

Section: Introductionmentioning

confidence: 99%

“…Plastic deformation modes are typically quite comparable to those produced by quasi-static loading for low velocity impacts. 28,29 For industrial necessities as assembly and to reduce the weight of the energy-absorbing components, it is advised to provide cutouts like holes in the body of the structure. Cutouts have a negative impact on the energy-absorbing members' ðEACÞ.…”

Section: Introductionmentioning

confidence: 99%

Multi-response optimization of crashworthy performance of perforated thin walled tubes

Alshahrani

Sebaey

Allah

et al. 2023

Journal of Composite Materials

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It is advised to add cuts as circular holes to constructions’ walls for technical requirements such as the assembly and to reduce the weight. Since these induced cutouts have a substantial influence on crashworthiness and failure mechanisms, the size, location, and number of these cutouts should be carefully selected for energy absorption components. This research concentrates on the optimization of process parameters for the crushing performance of perforated thin-walled glass/epoxy (GFRP) square tubes. Taguchi model was adapted to formulate the design of the experiment while desirability function analysis (DFA) was used for process parameters optimization in terms of crashworthiness indicators. Test specimens were fabricated via wet warping by hand lay-up technique and tested under quasi-static axial crushing. Finally, the specimen yielding the optimum process parameter combination was compared with the intact sample. GFRP samples with circular holes exhibit optimum initial peak force ([Formula: see text]) and total absorbed energy [Formula: see text] with values of 38.35 and 4.47 % which are smaller than those of the intact samples. On contrary, the optimum specific absorbed energy [Formula: see text] and crush force efficiency ([Formula: see text]) present, respectively, 31.08 and 80.28 % greater than those of intact one. The considered process parameters were noticed to be of substantial influences on the crush behavior of perforated GFRP tubes exposed to axial compression.

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“…However, CFRP composites are not without their drawbacks, one of which is the susceptibility to low velocity impact damage which, for aircraft, can be results of tool drop, runway debris, and bird strike during takeoff and landing. 1,2 These impact events could lead to external and internal damages of a CFRP composite structure in various damage modes, such as fiber breakage, delamination, matrix cracking, which will significantly compromise the structural integrity. 3–6…”

Section: Introductionmentioning

confidence: 99%

Low velocity impact behavior of auxetic CFRP composite laminates with in-plane negative Poisson’s ratio

Lin

Wang

2023

Journal of Composite Materials

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Introducing auxeticity or negative Poisson’s ratio is one potential solution to mitigate the low velocity impact damage of fiber reinforced polymer matrix composites, which can be achieved by tailoring the layup of an anisotropic composite laminate. This study aims to investigate the effect of laminate-level in-plane negative Poisson’s ratio on the low velocity impact behavior of carbon fiber reinforced polymer (CFRP) matrix composites using numerical simulations. The layups of the auxetic composites that allow them to produce negative Poisson’s ratios are identified based on the Classical Lamination Theory and verified through fundamental coupon-level experimental tests. To ensure meaningful comparisons, the non-auxetic counterpart composites are designed by allowing them to produce positive in-plane Poisson’s ratio while closely matching the longitudinal effective modulus of the auxetic laminate. The simulation results indicate that the auxetic laminates suffer smaller (12.6% on average) delamination area in top and bottom interfaces, much smaller (38% on average) matrix compressive damage in the top and bottom plies, and smaller (14.6% on average) fiber tensile damage area in each ply of the laminate at relatively higher impact energies (5 and 8 J).

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Experimental and numerical behaviors of GFRP laminates under low velocity impact

Cited by 16 publications

References 19 publications

Simulation Analysis of Delamination Damage for the Thick-Walled Composite-Overwrapped Pressure Vessels

Simulation Analysis of Delamination Damage for the Thick-Walled Composite-Overwrapped Pressure Vessels

Multi-response optimization of crashworthy performance of perforated thin walled tubes

Low velocity impact behavior of auxetic CFRP composite laminates with in-plane negative Poisson’s ratio

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