An experimental investigation on the three-point bending behavior of composite laminate

Azzam, A.; Li, W

doi:10.1088/1757-899x/62/1/012016

Cited by 38 publications

(28 citation statements)

References 11 publications

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“…cracking), composites may exhibit one or a combination of failure modes, includingbre rupture, matrix cracking, delamination, interface de-bonding and void growth [1,2]. Compared to conventional materials, composite laminates o er some unique engineering properties, while presenting interesting and challenging problems for analysts and designers [3].…”

Section: Tekstilec 2017 60(4) 310-316 Irregular Winding Of Pre-prementioning

confidence: 99%

Irregular Winding of Pre-preg Fibres Aimed at the Local Improvement of Flexural Properties

Kulhavý¹,

Martina²,

Srb³

et al. 2017

TEK

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Section: Tekstilec 2017 60(4) 310-316 Irregular Winding Of Pre-prementioning

confidence: 99%

Irregular Winding of Pre-preg Fibres Aimed at the Local Improvement of Flexural Properties

Kulhavý¹,

Martina²,

Srb³

et al. 2017

TEK

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“…etc. ), the interfacial structure and morphology, fibre orientation, laminate stacking, surface waviness and moulding temperature [5,[7][8][9][10]. For instance; Azzam A.…”

Section: Literature Reviewmentioning

confidence: 99%

“…For instance; Azzam A. & Li W. [5] deduced that quasi-isotropic types of stacking sequences of composite laminate structure exhibits a brittle behaviour, while the unbalance type exhibits a progressive failure mode consisting of fibre failure.…”

Section: Literature Reviewmentioning

confidence: 99%

“…However the matrix stiffness and its mechanical strength are lower than those of reinforcement, it acts as binder, holds the fibre together, transfers mechanical loads through the fibres to the rest of the structure and protects fibres from mechanical (impact, abrasion and corrosion) and environmental actions [3,4]. One of the important characteristic specific to solid materials is flexural modulus, therefore many researchers have determined this characteristic, using the three point bending test, to understand the effect different factors on the adaptable mechanical properties of composites [5]. CFRP composite can provide well-bonded structures with excellent strength and hardness after curing, but the viscoelastic properties of polymers causes the main problem of polymeric materials that results in creep and a high sensitivity to temperature [6].…”

Section: Introductionmentioning

confidence: 99%

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Flexural Behavior of CFRP Laminate at Elevated Temperature

Abdalrahman¹

2017

KJAR

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A carbon fibre reinforced polymer (CFRP) laminate forms the surface part of an integrally heated tool. It was made up of carbon non-crimp triaxial fibre and SR8100 epoxy in accordance to the stacking sequence of [(0, ±45)/ (90, ±45)] S, using the resin infusion (RI) method. The laminate is heated up to 90ºC when the tool is operated; therefore understanding the effect of temperature on the flexural properties is quite significant. This experimental study is carried out to investigate the flexural behaviour of the CFRP laminate and finding its flexural properties under the effect of elevated temperatures. For this purpose, various CFRP specim-ens were prepared and tested, using three point bending test method, at different temperature levels from room temperature to 90ºC. The results show that each of the flexural peak load, modulus and strength of the laminate decreases consistently with the increase of temperature. Also the laminate becomes slightly more flexible and significant loss occurs in its flexural modulus when the temperature elevates from 75ºC to 90ºC. The reduction in the flexural behaviour of CFRP is imputed to thermal softening of the epoxy polymer matrix whenever becomes closer to (HDT).

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“…To verify the efficacy of this method, we characterize the mechanical properties of fabricated samples with the focus on the bond interface. Specifically, we perform the three point bending test [30,31] and the end notched flexure test [32,33] to obtain Mode II strength and fracture toughness at the bond interface, respectively. These are relevant interface properties for our weak bond detection test to be discussed in section 4.…”

Section: Fabrication and Evaluation Of Weak Bond Samplesmentioning

confidence: 99%

Solitary wave-based delamination detection in composite plates using a combined granular crystal sensor and actuator

Kim

Restuccia

Yang

et al. 2015

Smart Mater. Struct.

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We experimentally investigate a diagnostic technique for identifying a weak bond in composites using highly nonlinear solitary waves (HNSWs). We set up a one-dimensional chain of granular crystals, consisting of spherical particles with nonlinear interactions, to generate HNSWs. These solitary wave packets are transmitted into an inspection area of composites by making a direct contact with the chain. We demonstrate that a strong type of solitary waves injected to the weak bond area can break the weak bond of laminates, thereby causing delamination. Then, to identify the creation of the delamination, we transmit a weak type of solitary waves by employing the same apparatus, and measure the solitary waves reflected from the specimens. By analyzing these reflected solitary waves, we differentiate the weak bond samples with the pristine bond ones in an efficient and fast manner. The diagnostic results based on the proposed method are compared with the strength and energy release rate at bond interfaces, which are measured via standard testing methods such as three point bending and end notched flexure tests. This study shows the potential of solitary wave-based detection of weak bonds for hot spot monitoring of composite-based structures.

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An experimental investigation on the three-point bending behavior of composite laminate

Cited by 38 publications

References 11 publications

Irregular Winding of Pre-preg Fibres Aimed at the Local Improvement of Flexural Properties

Irregular Winding of Pre-preg Fibres Aimed at the Local Improvement of Flexural Properties

Flexural Behavior of CFRP Laminate at Elevated Temperature

Solitary wave-based delamination detection in composite plates using a combined granular crystal sensor and actuator

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