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The interfacial fracture behavior of foam core composite sandwich structures by a viscoelastic cohesive model

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Abstract

A sandwich beam model consisting of two face sheets and a foam core bonded by a viscoelastic adhesive layer is considered in order to investigate interfacial fracture behavior. Firstly, a cohesive zone model in conjunction with a Maxwell element in parallel, or with a Kelvin element in series, respectively, is employed to describe the characteristics of viscoelasticity for the adhesive layer. The models can be implemented into the implicit finite element code. Next, the parametric study shows that the influences of loading rates on the cohesive zone energy and strength are quite different for different models. Finally, a sandwich double cantilever beam model is adopted to simulate the interface crack growth between the face sheet and core. Numerical examples are presented for various loading rates to demonstrate the efficacy of the rate-dependent cohesive models.

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Authors and Affiliations

  1. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian, 116024, China

    ShiYong Sun & HaoRan Chen

  2. Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian, 116024, China

    ShiYong Sun

Authors
  1. ShiYong Sun
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  2. HaoRan Chen
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Correspondence to HaoRan Chen.

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Recommended by WANG JianXiang (Editorial Board Member)

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Sun, S., Chen, H. The interfacial fracture behavior of foam core composite sandwich structures by a viscoelastic cohesive model. Sci. China Phys. Mech. Astron. 54, 1481–1487 (2011). https://doi.org/10.1007/s11433-011-4393-y

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  • DOI: https://doi.org/10.1007/s11433-011-4393-y

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