Rate dependence of mode I fracture behaviour in carbon-fibre/epoxy composite laminates

Kusaka, Takayuki; Hojo, Masaki; Mai, Yiu‐Wing; Kurokawa, Tomoaki; Nojima, Toshio; Ochiai, Shojiro

doi:10.1016/s0266-3538(97)00176-0

Cited by 112 publications

(46 citation statements)

References 13 publications

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“…In GC laminates, the observed test results are difficult to interpret with respect to identifying G i Ic and G p Ic . Non-smooth response has also been observed by Kusaka et al [8], who explained the cause by appealing to rate dependence of G i Ic . Blackman et al [9] also found non-smooth, stick-slip crack growth in a carbon fibre/PEEK composite as the loading rate was increased, suggesting that a definition of a critical load to back out a value of G i Ic would be problematic.…”

Section: Introductionmentioning

confidence: 64%

Non-smooth mode I fracture of fibre-reinforced composites: an experimental, numerical and analytical study

Davidson

Waas

2012

Phil. Trans. R. Soc. A.

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We present a novel approach to analyse the fracture of fibre-reinforced composites. Experimental results on mode I fracture of glass fibre and carbon fibre unidirectional laminates presented here and published by others in the open literature formed the basis for the analytical and numerical results presented. When details of the external loading rate are explicitly accounted for, a new picture of fracture emerges, which encompasses the possibility for non-smooth crack growth and the necessity to relax the use of a critical strain energy release rate as a criterion for crack advancement. Results predicted by adopting the analytical model presented here are seen to capture a wide variety of fracture responses that have been observed previously.

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Section: Introductionmentioning

confidence: 64%

Non-smooth mode I fracture of fibre-reinforced composites: an experimental, numerical and analytical study

Davidson

Waas

2012

Phil. Trans. R. Soc. A.

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“…On propagation from a vascule, the crack plane is exposed to an instantaneous increase in displacement rate over the 2 mm/min set rate. Previous studies have shown the rate dependency of FRP laminates, with severe reductions in Mode I fracture toughness reported at high strain rates [26,27]. This type of uncontrolled rapid fracture is undesirable in the aerospace industry, however, the long periods of crack arrest potentially provide time for migration and gelation of released healing agents.…”

Section: Mode I Crack-vascule Interactionsmentioning

confidence: 99%

Interactions between propagating cracks and bioinspired self-healing vascules embedded in glass fibre reinforced composites

Norris

Bond

Trask

2011

Composites Science and Technology

110

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International audienceThis study considers the embedment of a bioinspired vasculature within a composite structure that is capable of delivering functional agents from an external reservoir to regions of internal damage. Breach of the vascules, by propagating cracks, is a crucial pre-requisite for such a self-healing system to be activated. Two segregated vascule fabrication techniques are demonstrated, and their interactions with propagating Mode I and II cracks determined. The vascule fabrication route adopted played a significant role on the resulting laminate morphology which in-turn dictated the crack-vascule interactions. Embedment of the vascules did not lower the Mode I or II fracture toughness of the host laminate, with vascules orientated transverse to the crack propagation direction leading to significant increases in G and G through crack arrest. Large resin pockets were found to redirect the crack around the vascules under Mode II conditions, therefore, it is recommended to avoid this configuration for self-healing applications

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“…Mod I yüklemesi altındaki çift konsol kiriş numuneye etkiyen yük uygulama hızı arttıkça ölçülen G c değeri düşmektedir. Bu nedenle standart test metotlarında tavsiye edilen yük uygulama hızı değeri 1-5 mm/dak ile sınırlandırılmıştır [24][25][26][27][28].…”

Section: Introductionunclassified

Karbon Lifi/Epoksi Tabakalı Kompozit Malzemelerin Farklı Ortam Şartlarındaki Mod I Kırılma Davranışı

Darıcık¹,

Çelebi²

2017

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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ÖzTabakalar arası çatlak ve kırılma, tabakalı kompozit malzemelerde çokça karşılaşılan bir hasar türüdür. Ayrılma modu tabakalar arası kırılmanın en kolay gerçekleştiği ve tabakalar arası kırılma tokluğunun en düşük olduğu kırılma modudur. Mode I Interlaminar Fracture Behaviour of Carbon/Epoxy Laminated Composites under Different Temperatures AbstractInterlaminar fracture of a laminated composite material is the damage resistance of the material to cracks located at interface. Mode I interlaminar fracture takes place and damages composites more easily than other modes since it is frictionless. In this study, the effect of ambient temperature to mod I interlaminar fracture toughness of carbon/epoxy laminate was studied. It is found out that if the ambient temperature decreases under 0 o C, Mod I interlaminar fracture toughness decreases also. However fracture behavior doesn't change and R-curve behaviors of laminates are similar under the 23 o C and below. For higher ambient temperatures than 23 o C, it is concluded that glass transition temperature (T g ) of epoxy matrix is key parameter and the crack doesn't propagate if the temperature is close to T g . Fracture characteristics of the laminate are so different under the temperatures higher than T g .

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Rate dependence of mode I fracture behaviour in carbon-fibre/epoxy composite laminates

Cited by 112 publications

References 13 publications

Non-smooth mode I fracture of fibre-reinforced composites: an experimental, numerical and analytical study

Non-smooth mode I fracture of fibre-reinforced composites: an experimental, numerical and analytical study

Interactions between propagating cracks and bioinspired self-healing vascules embedded in glass fibre reinforced composites

Karbon Lifi/Epoksi Tabakalı Kompozit Malzemelerin Farklı Ortam Şartlarındaki Mod I Kırılma Davranışı

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