Fracture Toughness of Composite Joints With Carbon Nanotube Reinforcement

Faulkner, S. D.; Kwon, Young W.

doi:10.1115/1.4002676

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Previous studies showed that calculation of energy release rates was very useful for predicting the interface joint strength of composites with known critical energy release rates (Kwon et al, 2008a, b;Faulkner and Kwon, 2011;Faulkner et al, 2009; Step/butted joint and step overlap joint Interface fracture of hybrid joint McGuire and Harris, 1974;Harris et al, 1976;Hummelgen et al, 1996;Yu et al, 2002;Siau et al, 2005;Crane et al, 2005;Kwon et al, 2011;Kwon and Marron, 2009). As a result, this study also computes the energy release rates for various situations to evaluate the joint strength of the hybrid composite.…”

Section: Description Of Analysis Modelsmentioning

confidence: 90%

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Interface fracture of hybrid joint of glass‐/steel‐fiber composite

Boseman

Kwon

Loup

et al. 2012

Engineering Computations

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Purpose -In order to connect a fiberglass composite structure to a steel structure, a hybrid composite made of glass and steel fibers has been studied. The hybrid composite has one end section with all glass fibers and the opposite end section with all steel fibers. As a result, it contains a transition section in the middle of the hybrid composite changing from glass fibers to steel fibers. The purpose of this paper is to examine interface strength at the glass to steel fiber transition section, in order to evaluate the effectiveness of the hybrid composite as a joining technique between a polymer composite structure and a metallic structure. Design/methodology/approach -The present micromechanical study considers two types of glass to steel fiber joints: butt and overlap joints. For the butt joint, the end shape of the steel fiber is also modified to determine its effect on interface strength. The interface strength is predicted numerically based on the virtual crack closure technique to determine which joint is the strongest under various loading conditions such as tension, shear and bending. Numerical models include resin layers discretely. A virtual crack is considered inside the resin, at the resin/glass-layer interface, and at the resin/steel-layer interface. The crack is located at the critical regions of the joints. Findings -Overall, the butt joint is stronger than the overlap joint regardless of loading types and directions. Furthermore, modification of an end shape of the middle fiber layers in the butt joint shifts the critical failure location. Originality/value -The paper describes one of a few studies which investigated the interface strength of the hybrid joint made of fiberglass and steel-fiber composites. This joint is important to connect a polymeric composite structure to a metallic structure without using conventional mechanical joints.

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Section: Description Of Analysis Modelsmentioning

confidence: 90%

“…The strength of scarf joints as well as an improvement of their joint strength using carbon nanotubes (Kwon et al, 2008b;Faulkner and Kwon, 2011;Faulkner et al, 2009) has been studied. The welding technique is a well-known joining technique for metals.…”

Section: Introductionmentioning

confidence: 99%

Interface fracture of hybrid joint of glass‐/steel‐fiber composite

Boseman

Kwon

Loup

et al. 2012

Engineering Computations

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Two-Dimensional Electro-Elastic Analysis of FG-CNTRC Cylindrical Laminated Pressure Vessels With Piezoelectric Layers Based on Third-Order Shear Deformation Theory

Mohammadi

Arefi

Ahmadi

2019

Journal of Pressure Vessel Technology

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The purpose of this paper is to show the electro-elastic static behavior of cylindrical sandwich pressure vessels integrated with piezoelectric layers. The core is made of functionally graded carbon nanotube-reinforced composite (FG-CNTRC). The cylinder is embedded between two piezoelectric layers made of PZT-4. The effective material properties of reinforced core with carbon nanotubes (CNTs) are calculated based on rule of mixture. The constitutive relations are developed in cylindrical coordinate system based on a higher-order shear deformation theory for both core and piezoelectric layers. The employed higher-order theory is based on third-order variation of deformations along the thickness direction to improve the accuracy of numerical results. The method of eigenvalue–eigenvector is used for solution of system of governing equations along the longitudinal direction. The numerical results are provided along the longitudinal and radial directions in terms of significant parameters such as various patterns of CNTs, various volume fractions of CNTs, various elastic foundation coefficients, and various applied electrical potentials.

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Fracture Toughness of Composite Joints With Carbon Nanotube Reinforcement

Cited by 2 publications

References 6 publications

Interface fracture of hybrid joint of glass‐/steel‐fiber composite

Interface fracture of hybrid joint of glass‐/steel‐fiber composite

Two-Dimensional Electro-Elastic Analysis of FG-CNTRC Cylindrical Laminated Pressure Vessels With Piezoelectric Layers Based on Third-Order Shear Deformation Theory

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