Experimental investigation on test methods for mode II interlaminar fracture testing of carbon fiber reinforced composites

Wang, Wen Xue; Nakata, Miko; Takao, Yoshihiro; Matsubara, Terutake

doi:10.1016/j.compositesa.2009.04.029

Cited by 89 publications

(48 citation statements)

References 18 publications

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“…The latter causes fibre-bridging, micro-cracks and other non-elastic effects which will of course affect the compliance and the actual delamination length. As such, a correction is necessary [8,9] and the equivalent delamination length becomes:…”

Section: Mode II End Notch Flexure Experimentsmentioning

confidence: 99%

“…Furthermore, a microscopic evaluation of the side of the specimen was conducted to investigate the specific jumps during crack growth. The mode II crack growth was investigated using the End Notch Flexure setup, since this proved an interesting setup with little effect of friction and little scatter on the value of G IIC [8]. The three-point bending setup is chosen over the four-point version, to allow for microscopic evaluation of the sides.…”

Section: Introduction and Principlementioning

confidence: 99%

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Study of the Mode I and Mode II interlaminar behaviour of a carbon fabric reinforced thermoplastic

et al. 2012

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A delamination or an interlaminar failure is a critical failure mechanism for fibrereinforced composites and, therefore, has already been studied extensively by many researchers. However, it remains an actual research topic, since every day, new polymers with better mechanical properties are being developed for fibre reinforced composites. This manuscript describes an experimental study of both the Mode I and Mode II interlaminar behaviour of a 5-harness satin weave carbon fabric reinforced polyphenylene sulphide (PPS). The mode I crack growth is studied using the Double Cantilever Beam (DCB) setup, whereas the mode II behaviour was studied by the End Notch Flexure (ENF) test. For mode I, an unstable crack-growth was seen resulting in a saw-tooth like force-displacement curve. Therefore, a model based on Linear Elastic Fracture Mechanics was considered to determine G IC for both initiation and propagation. Furthermore, the effect of possible fibre-bridging was assessed and an online microscopic study was conducted so that the origin of the specific jumps in crack growth could be determined. For mode II, stable crack propagation occurred and the Compliance-Based Beam Method was used to determine G IIC for both initiation and propagation. It could be concluded that the considered approach worked well for this material and reproducible results and values were found.

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Section: Mode II End Notch Flexure Experimentsmentioning

confidence: 99%

Section: Introduction and Principlementioning

confidence: 99%

Study of the Mode I and Mode II interlaminar behaviour of a carbon fabric reinforced thermoplastic

et al. 2012

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“…[21][22][23]. In the absence of a recognised standard, testing was based on the guidelines provided by the European Structural Integrity Society, Technical Committee 4 [24].…”

Section: Mode II End Loaded Split (Els) Testingmentioning

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

109

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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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“…Desta forma, fraturas interlaminares descrevem falhas orientadas entre as camadas, ocorrendo no plano do laminado, fraturando principalmente a matriz, com poucas ou nenhuma fratura de fibra [13,14].…”

Section: Avaliação Da Resistência Interlaminar Do Compósito Pei/fibraunclassified

Avaliação da Resistência Interlaminar do Compósito PEI/Fibras de Carbono Soldado pelo Método de Resistência Elétrica

et al. 2016

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Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution Non-Commercial, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que sem fins comerciais e que o trabalho original seja corretamente citado. Evaluation of the Interlaminar Resistance of Composite PEI/Carbon Fibers Welded by Electrical Resistance MethodAbstract: This study has as main objective to evaluate the effectiveness of the welding process by electrical resistance in composite poly (éterimida) matrix reinforced with continuous fibers of carbon, from the study of the thermal and mechanical properties of the welded joint.To evaluate the thermal properties of the welded material samples were subjected to analysis by thermogravimetry and by thermomechanical analysis. With the intention to study the resulting weld interface, studies were made from the shear tests ILSS and Iosipescu, as well as end-Notched Flexure (ENF). The results of the thermal analysis in laminated PEI / carbon fiber non-welded show that the beginning of degradation for these composites is 460 °C, and it is also evident that the glass transition temperature of welded samples is about 15% higher than the results from samples not welded. In the mechanical tests show that there was an increase of 32% and 20% respectively in interlaminar shear results for the ILSS and Iosipescu welded samples, when they are compared to samples not welded. The ENF test results show satisfactory values of interlaminar fracture toughness in the composite welded from the values found in literature.

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Experimental investigation on test methods for mode II interlaminar fracture testing of carbon fiber reinforced composites

Cited by 89 publications

References 18 publications

Study of the Mode I and Mode II interlaminar behaviour of a carbon fabric reinforced thermoplastic

Study of the Mode I and Mode II interlaminar behaviour of a carbon fabric reinforced thermoplastic

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

Avaliação da Resistência Interlaminar do Compósito PEI/Fibras de Carbono Soldado pelo Método de Resistência Elétrica

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