Fabrication of Fibre Metal Laminates with Multiscale Toughening Mechanisms

Although Fibre Metal Laminates (FMLs) show many advantages compared to other composite materials, their layered structure, a result of bonding dissimilar materials, makes FMLs prone to delamination. Conventional solutions to toughen the metal-composite interface have already reached their limit. For further improvement to the metal-composite interfacial bonding properties, a multiscale approach involving micro/nanotoughening mechanisms needs to be implemented. However, the fabrication of FMLs with controlled toughening at different length scales is complicated. This paper introduces a new methodology to manufacture FMLs having micro-and nanosized features using a 3D interconnected silver nanowire interleave at the metal-composite interface. The effects of processing parameters on the extent and effectiveness of the multiscale toughening mechanisms are presented.

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Mode-I Metal-Composite Interface Fracture Testing for Fibre Metal Laminates

Advances in Materials Science and Engineering ◽

10.1155/2018/4572989 ◽

2018 ◽

Vol 2018 ◽

pp. 1-11 ◽

Cited By ~ 3

Author(s):

Periyasamy Manikandan ◽

Gin Boay Chai

Keyword(s):

Finite Element ◽

Fracture Energy ◽

Interface Fracture ◽

Mode I ◽

Metal Composite ◽

Fibre Metal Laminates ◽

Mode I Fracture ◽

Metal Plasticity ◽

Composite Interface ◽

Fibre Metal

The main contribution of the present paper is the determination of the mode-I fracture of metal-composite interface region for fibre metal laminates (FMLs). A hybrid DCB configuration is proposed to investigate the mode-I fracture between metal-composite interface using experimental and numerical approaches. A computationally efficient and reliable finite element model was developed to account for the influence of metal plasticity on the measured fracture energy. The results of the experimental and numerical studies showed that metal plasticity increases the fracture energy of the metal-composite interface as the fracture event progresses. The applied energy truly utilized to propagate metal-composite interface fracture was predicted numerically by extracting the elastic strain energy data. The predicted true fracture energy was found to be approximately 50% smaller than the experimentally measured average propagation energy. The study concluded that metal plasticity in hybrid DCB configuration overpredicted the experimentally measured fracture energy, and this can be alleviated through numerical methodology such as the finite element approach as presented in this paper.

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Experimental Testing and Analytical Modeling of Asymmetric End-Notched Flexure Tests on Glass-Fiber Metal Laminates

Metals ◽

10.3390/met10010056 ◽

2019 ◽

Vol 10 (1) ◽

pp. 56 ◽

Cited By ~ 3

Author(s):

Konrad Dadej ◽

Jarosław Bieniaś ◽

Paolo Sebastiano Valvo

Keyword(s):

Glass Fiber ◽

Experimental Testing ◽

Metal Composite ◽

Interface Model ◽

Experimental Campaign ◽

Composite Interface ◽

Theoretical Predictions ◽

Elastic Interface ◽

Fiber Metal ◽

Rigid Interface

An experimental campaign on glass-fiber/aluminum laminated specimens was conducted to assess the interlaminar fracture toughness of the metal/composite interface. Asymmetric end-notched flexure tests were conducted on specimens with different fiber orientation angles. The tests were also modeled by using two different analytical solutions: a rigid interface model and an elastic interface model. Experimental results and theoretical predictions for the specimen compliance and energy release rate are compared and discussed.

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