The yield behaviour of an array of metal-coated fibres |
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| Institution: | 1. Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands;2. Benjamin Levich Institute and Department of Chemical Engineering, City College of New York, CUNY, New York, NY 10031, USA;1. National University of Singapore, Singapore;2. Aix Marseille University, AMSE, CNRS & EHESS, France;3. Macquarie University, Australia;1. Rolls-Royce@NTU Corporate Lab, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;2. School of Mechanical & Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;3. Advanced Technology Centre, Rolls-Royce Singapore Pte Ltd, 1 Seletar Aerospace Crescent, Singapore 797575, Singapore;4. School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore |
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| Abstract: | The biaxial compaction of a square array of metal-coated fibres (MCFs) is examined using the finite element method. The array is first compacted to a certain density using biaxial loading paths consistent with those for hydrostatic and closed-die compaction. The yield surfaces are then constructed at various stages of the densification. The size and shape of the yield surface depend on the loading history, relative density and on the fibre volume fraction. The yield surface after hydrostatic compaction has a corner at the initial loading point. However, the location of the corner on the yield surface after closed-die compaction depends on the relative density and the fibre volume fraction. The numerical results of the hydrostatic yield surface over a range of loading path are in good agreement with Fleck (1995) micro-mechanical model originally developed for the compaction of a random array of homogeneous particles. |
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