Progressive damage analysis as a design tool for composite bonded joints |
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| Affiliation: | 1. NASA Langley Research Center, Hampton, VA, 23681, USA;2. North Carolina State University, Raleigh, NC, 27695, USA;1. Department of Materials Engineering, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland;2. Air Force Institute of Technology, Ksi?cia Boles?awa 6, 01-494 Warsaw, Poland;1. Institute of Machine Tools and Manufacturing (IWF), ETH Zürich, Zurich, Switzerland;2. Faculty of Mechanical Engineering, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany;1. AMADE, Polytechnic School, University of Girona, Campus Montilivi s/n, 17071 Girona, Spain;2. Structural Mechanics and Concepts Branch, NASA Langley Research Center, MS 190, Hampton, VA 23681, USA |
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| Abstract: | This paper discusses the application of progressive damage analysis (PDA) methods as a design tool. Two case studies are presented in which the effects of changing design features on the strength of bonded composite joints are evaluated. It is shown that the trends of parametric evaluations performed with full-featured PDA models can be unintuitive and the trends can be opposite to those obtained with traditional design criteria. The joint configurations that were tested exhibit multiple damage modes, requiring several different PDA tools to accurately predict the structural peak loads. For damage tolerant structures that exhibit complex sequences of multiple failure mechanisms, traditional failure prediction tools are insufficient. Parametric PDA models encompassing a bonded joint specimen's design space have the potential to reveal unintuitive and advantageous design changes. |
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| Keywords: | C Finite element analysis (FEA) B Adhesion A Honeycomb D Mechanical testing |
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