Energy-based approach to impact damage in CFRP laminates

Delfosse, Daniel; Poursartip, Anoush

doi:10.1016/s1359-835x(96)00151-0

Cited by 95 publications

(44 citation statements)

References 6 publications

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“…where impact denotes the incident impact energy, rebound the kinetic energy of the rebounding impactor, damage the energy consumed by generation of damage and dissipated the energy dissipated as vibration, heat, inelastic deformation of the impactor or the fixture and so on (Delfosse and Poursartip, 1997). In the low-velocity impact without full penetration, dissipated is relatively larger than damage due to global deformation while damage is dominant in the high-velocity impact because of local deformation .…”

Section: Discussion 41 Comparison Of Damage Between Low-and High-velmentioning

confidence: 99%

Characterization of microscopic damage due to low-velocity and high-velocity impact in CFRP with toughened interlayers

Othman

Ogi

Yashiro

2016

Mechanical Engineering Journal

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Section: Discussion 41 Comparison Of Damage Between Low-and High-velmentioning

confidence: 99%

Characterization of microscopic damage due to low-velocity and high-velocity impact in CFRP with toughened interlayers

Othman

Ogi

Yashiro

2016

Mechanical Engineering Journal

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“…One explanation is that C-scan typically only measurers the projected delamination area however the energy absorbed can go to local deformation, matrix cracking, delaminations and fibre fracture [34]. This can be further complicated by the energy release rate [35] where more energy is required to propagate delamination and the distribution of the delaminations in the through-thickness.…”

Section: Mechanical Testingmentioning

confidence: 99%

The influence of toughening-particles in CFRPs on low velocity impact damage resistance performance

Bull

Scott

Spearing

et al. 2014

Composites Part A: Applied Science and Manufacturing

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The role of particle-toughening for increasing impact damage resistance in carbon fibre reinforced polymer (CFRP) composites was investigated. Five carbon fibre reinforced systems consisting of four particle-toughened matrices and one system containing no toughening particles were subjected to low velocity impacts ranging from 25 J to 50 J to establish the impact damage resistance of each material system. Synchrotron radiation computed tomography (SRCT) enabled a novel approach for damage assessment and quantification. Toughening mechanisms were detected in the particle-toughened systems consisting of particle-resin debonding, crack-deflection and crack-bridging. Quantification of the bridging behaviour, increase in crack path length and roughness was undertaken. Out of the three toughening mechanisms measured, particle systems exhibited a larger extent of bridging suggesting a significant contribution of this toughening mechanism compared to the system with no particles.

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“…Moreover, it is reported that under low-velocity impact the mass of impactor played an important role in material's dynamic response, which can explicitly be solved using quasi-static method when the ratio of impactor/object mass is larger than 2 with longer impact duration, while the response is dominated by flexural waves when the impactor/object mass ratio is less than 1/5 with shorter impact duration [4]. The energy absorption mechanisms of fiber composites may be contributed by the matrix cracking, fiber breakage, delamination, and ply splitting under low-velocity large mass impact [3,[5][6][7][8][9]. Generally, the size and severity of the damage are gradually getting larger as the exterior input impact energy increased while under the low-velocity drop-weight impact [10,11].…”

Section: Introductionmentioning

confidence: 99%

Improvement of impact-resistant property of glass fiber-reinforced composites by carbon nanotube-modified epoxy and pre-stretched fiber fabrics

et al. 2015

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Glass fiber-reinforced plastic composites (GFRPs) are often suffered to impact loadings; it is essential to improve its damage-resistant properties and understand the energy absorption mechanisms. In this work, the low-velocity impact behaviors of GFRPs were investigated in consideration of epoxy resins modified with 0, 0.4, and 0.75 % multi-walled carbon nanotubes (MWCNTs) by weight content and pre-stretched fabric at 0, 1.27, and 2.47 kg weight. In comparison with pure GFRPs sample, MWCNT-modified specimens are effective in improving the impact resistance under impact energies at 9, 16, and 22 J in terms of reduced damage factor and enhanced perforation threshold. Microscopic fractographic analysis indicated that the incorporation of MWCNTs in epoxy matrix offered additional mechanisms through breakage, bridging, and pull-out of carbon nanotubes to favor load transfer effect, prevent crack propagation, and thus dissipate more energy. The dynamic thermo-mechanical analysis proved that MWCNTs improved the storage modulus and glass transition temperature of the composites. In addition, the pre-stretched GFRP composites showed more impact resistant than the non-stretched ones through instant load transfer effect.

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Energy-based approach to impact damage in CFRP laminates

Cited by 95 publications

References 6 publications

Characterization of microscopic damage due to low-velocity and high-velocity impact in CFRP with toughened interlayers

Characterization of microscopic damage due to low-velocity and high-velocity impact in CFRP with toughened interlayers

The influence of toughening-particles in CFRPs on low velocity impact damage resistance performance

Improvement of impact-resistant property of glass fiber-reinforced composites by carbon nanotube-modified epoxy and pre-stretched fiber fabrics

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