Mode I fracture toughness of CFRP as a function of temperature and strain rate

Machado, J.J.M.; Marques, E.A.S.; Campilho, R.D.S.G.; Silva, Lucas F. M. da

doi:10.1177/0021998316682309

Cited by 57 publications

(36 citation statements)

References 42 publications

(45 reference statements)

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“…The elastic mechanical properties of the used material were previously determined in the work of Campilho . Also, the complete cohesive properties of the CFRP, determined at quasi‐static conditions (1 and 100 mm/min), were previously determined by the authors …”

Section: Methodsmentioning

confidence: 99%

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Fatigue performance of single lap joints with CFRP and aluminium substrates prior and after hygrothermal aging

Machado

Marques

Barbosa

et al. 2019

Fatigue Fract Eng Mat Struct

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Adhesive bonding has been extensively used to join composites and aluminium alloys in the automotive industry, but a deeper understanding of its fatigue behaviour is still required. This work presents a novel evaluation of the combined performance of joints manufactured with carbon fibre reinforced plastic (CFRP) and aluminium substrates subjected to fatigue loads in the unaged, hygrothermally aged, and dried after hygrothermal aging states. The experimental results allowed to conclude that the fatigue performance of joints can be affected by changes induced by the drying process or losses in the interface strength and that dissimilar combination of substrates sustains higher number of cycles to failure. The fatigue performance of joints with dissimilar substrates was found to be better than that of joints with similar substrates, which can be attributed to the lower stresses acting on the adhesive layer. The presence of water has also noticeably changed the fatigue performance of joints with dissimilar substrates.

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Section: Methodsmentioning

confidence: 99%

“…39 Also, the complete cohesive properties of the CFRP, determined at quasi-static conditions (1 and 100 mm/min), were previously determined by the authors. [40][41][42][43]…”

Section: Materials and Propertiesmentioning

confidence: 99%

Fatigue performance of single lap joints with CFRP and aluminium substrates prior and after hygrothermal aging

Machado

Marques

Barbosa

et al. 2019

Fatigue Fract Eng Mat Struct

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“…One of the few known work regarding the impact characterization of CFRP in which the G IC was experimentally determined, was performed by the authors. 25 As only experimental data are available for the case of quasi-static conditions, 22,26 the mechanical properties of CFRP under impact were not considered to be strain rate dependent in the numerical models, and were based on the quasi-static values ( Table 2).…”

Section: Experimental Details Cfrp Mechanical Propertiesmentioning

confidence: 99%

“…[15][16][17] Numerical analyses of composite plates under an impact load were performed by several authors [18][19][20] with good agreement with the experimental results. The use of cohesive elements to simulate the behaviour of composite materials has been studied, [21][22][23][24] allowing to conclude that such integration is able to correctly assess the G IC behaviour. Numerical studies regarding the measurement of G IC of composite materials are not currently available in the literature for the case of impact conditions, which then constitutes a field to explore.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of mode I fracture toughness of carbon-fibre-reinforced plastic under an impact load

Machado

Nunes

Marques

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part L:

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The main objective of this work is, by using cohesive zone modelling, to compute the fracture toughness behaviour in mode I of unidirectional carbon-fibre-reinforced plastic subjected to an impact load at 4.7 m/s. To perform this task, double-cantilever beam specimens were simulated, with its opening displacement and crack propagation being assessed, as well as the evolution of strain rate through the test. Therefore, by plotting the crack propagation, it was possible to calculate the fracture toughness in mode I ( GIC). A comparison of the numerical results with experimental tests previously performed by using a drop weight falling-wedge impact test equipment was made, allowing to infer that the numerical approach, based on a triangular cohesive zone modelling, is capable to predict the behaviour of such specimens under impact, accurately obtain GIC, and to determine the value of strain rate achieved through the test.

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“…Fibre-reinforced polymer composites have also been subjected to the destructive tests under different strain rates to evaluate their mechanical response [25][26][27]. It was found that while the tensile properties of unidirectional composites, dominated by the fibre, were not affected by the strain rate, the opposite was the case for the transverse direction, dominated by the matrix, [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

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2020

Int J Astronaut Aeronautical Eng

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In designing polymer composites, while their basic mechanical properties are seen as the primary interest for safety concern, their inherent damping values are seen as the secondary for human being comfort, safety and health. However, in today's advanced aerial and land vehicles, comport and health of passengers are as important as their safety. The aim of this work is to investigate the dynamic and also quasi-static behaviors of a glass fibre-reinforced polymer matrix composite, Hexply 913/33%/UD280, to be considered for structural as well as vibratory conditions. The specimens with different angles of fibre orientations (0, ± 10°, ± 20°, ± 35°, ± 45°, ± 55°, ± 70°, ± 80° and 90°) were manufactured from the composite prepreg and subjected to a vibrating beam test with the clamped-free boundary conditions. Two different methods, the half power bandwidth and the logarithmic free decay, were used to measure the damping values to be able to compare the results. A universal testing machine was used to obtain the stress-strain behaviors of the specimens. It has been revealed that the specimens with the ± 20°, ± 35° and ± 45° fibre orientations are able to produce high damping values with reasonable high maximum stresses. Especially the one with the ± 45 orientation is seen the best as it provides a high damping value and high strains to failure with an acceptable high stress. It is believed that such specimens are suitable for structural, vibratory and also impacted conditions, which is desired by many designers.

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Mode I fracture toughness of CFRP as a function of temperature and strain rate

Cited by 57 publications

References 42 publications

Fatigue performance of single lap joints with CFRP and aluminium substrates prior and after hygrothermal aging

Fatigue performance of single lap joints with CFRP and aluminium substrates prior and after hygrothermal aging

Numerical study of mode I fracture toughness of carbon-fibre-reinforced plastic under an impact load

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