A micromechanical model for kink-band formation: Part I — Experimental study and numerical modelling |
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| Authors: | S. Pimenta R. Gutkin S.T. Pinho P. Robinson |
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| Affiliation: | 1. IMDEA Materials Institute, C/Eric Kandel, 2, 28906 Getafe, Madrid, Spain;2. Department of Materials Science, Polytechnic University of Madrid, ETS de Ingenieros de Caminos, 28040 Madrid, Spain;3. AIRBUS Structures Research and Integration, ESIRNM, 18 Rue Marius Terce, 31300 Toulouse, France;1. Department of Adaptive Machine Systems, Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan;2. Magnesium Research Center & Department of Materials Science, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan;3. Department of Mechanical Engineering, Kitami Institute of Technology, 165 Koen-Cho, Kitami 090-8507, Japan;4. Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan;1. Department of Engineering Science, University of Oxford, Oxford, United Kingdom;2. School of Aerospace, Transport and Manufacturing, Cranfield, United Kingdom;3. Structural Impact Laboratory (SIMLab), Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), Richard Birkelands vei 1A, NO-7491 Trondheim, Norway;1. Industrial and Materials Science, Chalmers University of Technology, Hörsalsvägen 7B, SE-41296 Göteborg, Sweden;2. Swerea SICOMP AB, Mölndal, Sweden;3. GKN Aerospace Sweden AB, Flygmotorvägen, SE-46181 Trollhättan, Sweden |
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| Abstract: | The initiation and propagation of kink-bands are investigated through an experimental study and numerical modelling. Based on the results achieved, the sequence of events and key features for kink-band formation are identified; particularly, matrix yielding is found to play a crucial role in the process, and fibres are found to fail in the compressive side first. The findings from both the experimental and numerical programmes show a remarkable agreement, and are further applied to the development of an analytical model (Part II of this paper) for kink-band formation. |
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