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Research on failure modes and ultimate strength behavior of typical sandwich composite joints for ship structures

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This paper presents an experimental and numerical investigation on failure behavior and ultimate strength of fiber-reinforced sandwich composite structures. Tests were conducted on the sandwich Ljoints with Glass Fiber-Reinforced Polymer (GFRP) face sheet and Polyvinyl chloride (PVC) foam core. In the numerical simulation, a progressive damage method is established to simulate the strength and failure behavior of sandwich L-joint, different failure criteria are used to deal with the various failure modes of GFRP laminates. Cohesive zone model and viscoelastic material model are combined to model the face-core adhesive interface, hence the influence of fracture and debonding of adhesive to the total strength of sandwich joints is considered by the numerical modelling. On the base of these theories, the finite element model of sandwich L-joint has been successfully established, and the numerical predictions present a good agreement with the test results on both structural strength and failure process.

Abstract

This paper presents an experimental and numerical investigation on failure behavior and ultimate strength of fiber-reinforced sandwich composite structures. Tests were conducted on the sandwich Ljoints with Glass Fiber-Reinforced Polymer (GFRP) face sheet and Polyvinyl chloride (PVC) foam core. In the numerical simulation, a progressive damage method is established to simulate the strength and failure behavior of sandwich L-joint, different failure criteria are used to deal with the various failure modes of GFRP laminates. Cohesive zone model and viscoelastic material model are combined to model the face-core adhesive interface, hence the influence of fracture and debonding of adhesive to the total strength of sandwich joints is considered by the numerical modelling. On the base of these theories, the finite element model of sandwich L-joint has been successfully established, and the numerical predictions present a good agreement with the test results on both structural strength and failure process.

참고문헌 (36)

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