Effects of interphase material properties in unidirectional fibre reinforced composites

Maligno, Angelo; Warrior, N.A.; Long, A.C.

doi:10.1016/j.compscitech.2009.09.003

Cited by 83 publications

(46 citation statements)

References 25 publications

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“…A recent study by Dai et al [8] showed that even in carbon fibre/ epoxy composites with sizing optimised for epoxy, sizing removal can result in a 10 % increase in IFSS. This has been demonstrated by Maligno et al [9] where finite element studies have shown that sizing can have an adverse effect on the interfacial behaviour, if the stiffness is lower than the fibre/matrix materials. This can be a critical problem as the mechanical performance of discontinuous fibre composites is strongly influenced by the microscale interface, which is responsible for transferring shear stress between the discontinuous fibres and the matrix.…”

Section: Introductionmentioning

confidence: 77%

The usability of recycled carbon fibres in short fibre thermoplastics: interfacial properties

et al. 2016

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The objective of this study was to investigate the feasibility of combining discontinuous recycled carbon fibres with polypropylene, to produce a low-cost, high specific stiffness material for high-volume applications. The inherent low affinity of carbon fibre and polypropylene motivated a detailed study of the surface characteristics of carbon fibre and interfacial behaviour between the two materials, using the microbond test. The effects of removing the sizing from the fibres, as well as introducing a maleic anhydride-grafted polypropylene coupling agent, were extensively investigated. Polypropylene was found to degrade when prepared under atmospheric conditions; therefore, it was necessary to form droplets under nitrogen. Removal of the sizing from the fibre using pyrolysis and solvolysis techniques altered the surface morphology of the fibre and increased the interfacial shear strength (IFSS) by 4 and 33 %, respectively. A more significant improvement in the fibre-matrix adhesion was achieved by adding a maleic anhydride coupling agent at 2 wt%, which increased the IFSS by 320 %.

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Section: Introductionmentioning

confidence: 77%

The usability of recycled carbon fibres in short fibre thermoplastics: interfacial properties

et al. 2016

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Section: Temperature Dependent Materials Propertiesmentioning

confidence: 99%

Multi-Scale Modeling and Damage Analysis of Composite with Thermal Residual Stress

Han

Guan

et al. 2014

Appl Compos Mater

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In order to analysis thermal residual stress and its influence on the strength of composite, the hierarchical multi scale simulation method is applied. A microscopic computational model of single fiber composite with thermal residual stress is built to research the stress distribution. Then the damage initiation discipline details of unidirectional composite are researched, and the effects of different fiber arrangements on thermal residual stress distribution, damage initiation and the different final failure behaviors of fiber regular distribution and random distribution under tension and compression are researched in details. It shows that in fiber regular arrangement, damage initiation in interface appears evenly and in matrix it appears at somewhere randomly. But in fiber random arrangement, initial damage focuses at the resin pockets between closely packed fibers with both interface and matrix damage. The maximal thermal residual stress in fiber random arrangement model is larger than that in fiber regular arrangement model. And it reaches the normal strength of the interface and thus causing the initiation of interface damage. Also the failure modes of composites under transverse tension and compression with and without residual stress are quite different from each other. The strength and failure path of different RVE and loading are showing respectively in this paper.

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“…While for the epoxy resin, the properties are defined as functions of temperature, taking into account the strong influence of glass transition temperature T g on the mechanical properties. The relations are summarized as follows, which are first proposed by Zhang et al [10] and then used by many researchers [11,12]: (a) Poisson's ratio is assumed to be temperature independent with a value of v m ¼ 0:346. (b) To evaluate the variation of Young's modulus E m over the temperature range from curing to room temperature, the total temperature range can be divided into three regions:…”

Section: Temperature Dependent Materials Propertiesmentioning

confidence: 99%

Damage evolution and multi-scale analysis of carbon fiber-reinforced cross-ply laminate with thermal residual stress

Han

Guan

2015

Composite Interfaces

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In order to study the mechanical and thermal properties of carbon fiber-reinforced cross-ply laminate, a macroscopic [90/0] 8S cross-ply laminate model and a unit cell of fiber regular distribution near the [90/0] 8S laminate interlaminar zone with plastic matrix and interface were created. Then the damage initiation discipline details of [90/0] 8S cross-ply laminate are researched, and the effects of interfacial coefficient of thermal expansion on thermal residual stress distribution and damage initiation are researched in detail both based on the macroscopic and microscopic models. It shows that the initial damage of interlaminar interface occurs in macroscopic model and the initial damage in microscopic model occurs both at intralaminar interface and interlaminar cohesive zone. No matter in macroscopic or microscopic model, the residual stress of 6.27 × 10 −6 /°C interfacial coefficient of thermal expansion is larger than that of 6.27 × 10 −7 /°C interfacial coefficient of thermal expansion. And the initial damage expands more widely in the first one.

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Effects of interphase material properties in unidirectional fibre reinforced composites

Cited by 83 publications

References 25 publications

The usability of recycled carbon fibres in short fibre thermoplastics: interfacial properties

The usability of recycled carbon fibres in short fibre thermoplastics: interfacial properties

Multi-Scale Modeling and Damage Analysis of Composite with Thermal Residual Stress

Damage evolution and multi-scale analysis of carbon fiber-reinforced cross-ply laminate with thermal residual stress

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