Experimental analysis of CFRP laminates subjected to compression after impact: The role of impact-induced cracks in failure

Rivallant, Samuel; Bouvet, Christophe; Abdallah, Elias Abi; Broll, Bernhard; Barrau, Jean-Jacques

doi:10.1016/j.compstruct.2013.12.012

Cited by 98 publications

(37 citation statements)

References 33 publications

(47 reference statements)

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“…In contrast, studies in the literature [4,22,29] showed that laminates that have experienced higher energy impacts resulting in fibre fracture tend to exhibit local buckling towards the impact direction during CAI. The same studies also observed fibre fracture near the front surface due to compression during impact, leading to stress redistribution and stress concentration under subsequent CAI.…”

Section: Global Displacement Profilementioning

confidence: 82%

“…It was observed that a compressive crack near the front surface 0 o fibre plies, caused by previous impact, propagates perpendicular to the loading direction under compression, causing stress redistribution in 0 o plies, which contributes to the residual compressive strength reduction. [29] also showed the importance fibre fracture in CAI failure mechanisms. In these cases the fibre fracture was important due to either a highly toughened material system being used, causing a reduction in delamination are during impact, or a layup with surface zero plies, which became easily damaged during impact [29].…”

Section: Introductionmentioning

confidence: 92%

“…[29] also showed the importance fibre fracture in CAI failure mechanisms. In these cases the fibre fracture was important due to either a highly toughened material system being used, causing a reduction in delamination are during impact, or a layup with surface zero plies, which became easily damaged during impact [29]. This reiterates the importance of taking into account both material system and layup/geometry in understanding of CAI behaviour.…”

Section: Introductionmentioning

confidence: 92%

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Failure mechanisms and damage evolution of laminated composites under compression after impact (CAI): Experimental and numerical study

Sun

Hallett

2018

Composites Part A: Applied Science and Manufacturing

185

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The damage tolerance of Carbon Fibre Reinforced Polymer (CFRP) to Barely Visible Impact Damage (BVID) is a critical design limiter for composite structures. This study investigated the key driving mechanisms and damage evolution of the compressive failure of laminated composites containing BVID using compression after impact and indentation (CAI) tests. Experiments were carried out on two similar quasi-isotropic laminates: [452/902/02/-452]2S and [45/90/0/-45]4S. Matrix cracking and delaminations were introduced by either low-velocity impact or quasi-static indentation tests prior to the CAI tests. The fullfield displacement during CAI as well as the moment of rupture were captured by 3D Digital Image Correlation (DIC). The effect of ply-blocking and influence of factors, such as impact energy, delamination area and surface indentation, on compressive failure was studied. Previously validated high-fidelity finite element (FE) numerical models for the indentation and impact events were then used to investigate the damage evolution during CAI failure.

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Section: Global Displacement Profilementioning

confidence: 82%

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 92%

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Failure mechanisms and damage evolution of laminated composites under compression after impact (CAI): Experimental and numerical study

Sun

Hallett

2018

Composites Part A: Applied Science and Manufacturing

185

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“…Various numerical models were developed to predict the delamination failure during the CAI load . One study showed that it was possible to model the composite residual strength and damaged propagation behavior under the CAI loading . It was demonstrated that resin toughness rather than fiber strength and stiffness was the most important parameter to influence the CAI performance in quasi‐isotropic carbon fiber reinforced plastic laminates .…”

Section: Introductionmentioning

confidence: 99%

Characterization of multi‐stitched woven nano composites under compression after low velocity impact (CALVI) load

Bilişik

2017

Polymer Composites

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The purpose of this research was to determine the compression after low velocity impact (CALVI) properties of multi‐stitched nano composite. It was obtained that the CALVI strength of the multi‐stitched nano composite was higher than that of the unstitched composites with or without the nanomaterial. In addition, stitching types (hand stitch or machine stitch) and the particle size of nanomaterial or micro material types were found to be important structural parameters for the multi‐stitched nano composites. The CALVI load applied on the multi‐stitched nano composite resulted in lateral damages close to the impacted indentation region. The failure modes of the damaged zone were local matrix‐fiber debonding and delamination, kinking, and local multiple matrix‐fiber breakages in the in‐plane and out‐of‐plane directions of the composite. Multi‐stitched nano composite showed large damaged areas but the out‐of‐plane layer delamination was confined to relatively small areas. Thus, multi‐stitching and nano particle addition enhanced the CALVI properties of the composite structures. POLYM. COMPOS., 39:3750–3764, 2018. © 2017 Society of Plastics Engineers

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“…The post-buckling continues until out-of-plane stress exceeds the critical strain-energy-release mode I value or interlaminar strength. Final failure occurs because the delamination propagates perpendicularly to the applied load, and the laminate collapses [4].…”

Section: Introductionmentioning

confidence: 99%

A new device for determining the compression after impact strength in thin laminates

Remacha

Sánchez-Sáez

López-Romano

et al. 2015

Composite Structures

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Abstract:In this work a new device has been developed to estimate compression-after-impact (CAI) strength. This device allows the testing of laminates thinner than those recommended by CAI test standards. The pro-posed device is composed of a support structure, with a set of vertical ribs that stabilize the specimen during the test, increasing the buckling load. A numerical analysis was made to ensure that global buck-ling does not occur in the laminate during the CAI test, and that there is no interference with the damage area. Laminate specimens were tested with the proposed device and the ASTM device. For specimens 4.416 mm thick (thickness according to ASTM D7137 standard), the test results were similar with both devices. For thinner laminates, higher CAI strength was estimated with the proposed device than with the ASTM device, showing that the global buckling was delayed.

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Experimental analysis of CFRP laminates subjected to compression after impact: The role of impact-induced cracks in failure

Cited by 98 publications

References 33 publications

Failure mechanisms and damage evolution of laminated composites under compression after impact (CAI): Experimental and numerical study

Failure mechanisms and damage evolution of laminated composites under compression after impact (CAI): Experimental and numerical study

Characterization of multi‐stitched woven nano composites under compression after low velocity impact (CALVI) load

A new device for determining the compression after impact strength in thin laminates

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