Strengthening of composite T-joints using 1D and 2D carbon nanoparticles

Published on Jan 1, 2021in Composite Structures5.407
· DOI :10.1016/J.COMPSTRUCT.2020.112982
Anil R. Ravindran11
Estimated H-index: 11
,
Raj B. Ladani15
Estimated H-index: 15
+ 1 AuthorsAdrian P. Mouritz71
Estimated H-index: 71
Sources
Abstract
Abstract An experimental study is presented into the strengthening of composite T-shaped joints using carbon nanoparticles. The structural properties of carbon fibre reinforced epoxy composite T-joints containing a small weight fraction (1%) of carbon nanotubes (CNTs), carbon nanofibers (CNFs) or graphene nanoplatelets (GNPs) within the polymer matrix phase is studied. Experimental testing reveals that the strengthening effect depends on the nanoparticle type, with CNFs being the most effective at increasing the failure initiation load (~68%), ultimate failure load (46%) and absorbed energy capacity (~200%) of the T-joint. Improvements to the structural properties are also gained with the use of CNTs, although there is little or no gain with GNPs. The improvements to the T-joint properties correlate with the increases to the interlaminar fracture toughness properties of the carbon fibre reinforced composite laminates containing the nanoparticles. The strengthening and toughening mechanisms induced by the nanoparticles are described.
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#1Anil R. Ravindran (RMIT: RMIT University)H-Index: 11
#2Raj B. Ladani (RMIT: RMIT University)H-Index: 15
Last. Adrian P. Mouritz (RMIT: RMIT University)H-Index: 71
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Abstract A liquid metal synthesis process provides a new low energy pathway avenue to manufacture various low-dimensional nanomaterials in order to improve the mechanical properties of polymer composites. This paper presents an investigation of the strengthening and toughening performances of two-dimensional platelets of boehmite (γ-AlO(OH)) and alumina (γ-Al2O3). Using a liquid metal alloy reaction process, two-dimensional metal oxide hydroxide and oxide platelets were synthesised and then used...
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#1Anil R. Ravindran (RMIT: RMIT University)H-Index: 11
#2Raj B. Ladani (RMIT: RMIT University)H-Index: 15
Last. Adrian P. Mouritz (RMIT: RMIT University)H-Index: 71
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Abstract Mechanical joint and adhesive bonding are two typical joining methods for composite materials. The bolt fastening method is reliable but increases the weight of the structure and cuts the composite fiber, which may cause stress concentration and strength degradation. The adhesive bonding method has a higher bonding strength than the mechanical fastening, but the bonding strength can deteriorate depending on the various parameters that influence the environmental conditions and manufactu...
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Abstract Carbon nanomaterials secure promises of incorporating exceptional mechanical performance and multifunctional properties into polymers. However, questions concerning type of carbon nanofiller, fraction and corresponding change in relevant property are yet to be answered. In this study, graphene platelets (GnPs) and carbon nanotubes (CNTs) were added individually into epoxy adhesive and corresponding structure-property relations were investigated experimentally and numerically. The study ...
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#1Anil R. Ravindran (RMIT: RMIT University)H-Index: 11
#2Raj B. Ladani (RMIT: RMIT University)H-Index: 15
Last. Adrian P. Mouritz (RMIT: RMIT University)H-Index: 71
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Abstract Multi-scale toughening is a key strategy employed by biological systems, made of intrinsically brittle constituents, to achieve high damage tolerance. This paper presents an investigation of the synergistic enhancements to the mode I interlaminar fracture toughness of fibre-polymer composite laminates using multi-scale carbon reinforcements. By combining carbon nanofibres (CNFs) dispersed in the matrix and z-pins in the laminate thickness at various contents, an extra mechanism of energ...
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#1Anil R. Ravindran (RMIT: RMIT University)H-Index: 11
#2Raj B. Ladani (RMIT: RMIT University)H-Index: 15
Last. Adrian P. Mouritz (RMIT: RMIT University)H-Index: 71
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Abstract This paper presents an investigation into the synergistic improvement to the mode II interlaminar fracture toughness of composites using multi-scale carbon reinforcements spanning the nano to millimetre length scales. Varying volume fractions of nano-scale carbon fibres (CNFs) and millimetre-long carbon fibre z-pins were used to increase the mode II delamination resistance of multi-scale reinforced composites. The results reveal that adding CNFs to the epoxy matrix and transversely inse...
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#2Weijun Li (China University of Petroleum)H-Index: 9
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Metal-free carbonaceous nanomaterials have witnessed a renaissance of interest due to the surge in the realm of nanotechnology. Among myriads of carbon-based nanostructures with versatile dimensionality, one-dimensional (1D) carbon nanotubes (CNTs) and zero-dimensional (0D) carbon dots (CDs) have grown into a research frontier in the past few decades. With extraordinary mechanical, thermal, electrical and optical properties, CNTs are utilized in transparent displays, quantum wires, field emissio...
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#1Zsombor Sápi (University of Bath)H-Index: 3
#2Richard Butler (University of Bath)H-Index: 21
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