Damage characterisation of fibre metal laminates under interlaminar shear load |
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| Authors: | Stephan Hinz Toshihiro Omoori Masaki Hojo Karl Schulte |
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| Affiliation: | 1. Institut für Kunststoffe und Verbundwerkstoffe, Technische Universität Hamburg-Harburg, Germany;2. Adaptive Materials and Structures Lab., Dept. of Mechanical Engineering, Kyoto University, Japan;1. School of Mechanical Engineering, Iran University of Science and Technology, Narmak, 16846 Tehran, Iran;2. Department of Composite, Iran Polymer and Petrochemical Institute, Tehran, Iran;1. Department of Mechanical, Aeronautical and Biomedical Engineering, Materials Surface Science Institute, University of Limerick, Limerick, Ireland;2. Department of Design and Manufacturing Technology, Materials Surface Science Institute, University of Limerick, Limerick, Ireland;1. National Key Laboratory of Science and Technology on Advanced Composite in Special Environments, Harbin Institute of Technology, Harbin 150080, PR China;2. Department of Mechanical and Aerospace Engineering, University of California, Los Angeles 90095-1597, CA, USA |
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| Abstract: | Transverse composite plies are part of the fibre metal laminate Glare®4B and were investigated under interlaminar shear load. Double-notched shear (DNS) tests were performed and deformation and damage were in situ observed by Scanning Electron Microscopy (SEM) equipped with a loading apparatus. Interlaminar shear strength as well as shear stress values corresponding to the onset of the fibre/matrix-debonding were determined.Although a cross-ply lay-up within the laminate has been interlaminar shear loaded, damage and failure could only be found within the transverse plies. Over their thickness, fibre/matrix-debonding proved to be pronounced near the ply boundaries of the transverse plies, where exceptionally high shear strains could be found. Nevertheless, single fibre/matrix-debonding phenomena were also observed within the centre area of these transverse plies. Although interlaminar shear strain within latter regions is reduced, single events of fibre/matrix-debonding could be attributed to local high stress concentrations due to the fibre arrangement and to small inter fibre distances. |
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