Analysis of a reversible five-point bending configuration based on a novel two-sense support |
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| Institution: | 1. Materials and Technologies Group, Department of Mechanical Engineering, Polytechnic University College, University of the Basque Country (UPV/EHU), Plaza de Europa 1, 20018 San Sebastián, Spain;2. IK4-Ikerlan, Department of Mechanical Design, Paseo J.M Arizmendiarrieta, Arrasate-Mondragon, Spain;1. Institute for Sustainability and Innovation, College of Engineering and Science, Victoria University, PO Box 14428, Melbourne, 8001, Australia;2. College of Engineering and Science, Victoria University, PO Box 14428, Melbourne, 8001, Australia;1. Food and Bio-based Products Group, AgResearch, Lincoln, Canterbury 8140, New Zealand;2. Food and Bio-based Products Group, AgResearch, Grasslands, Palmerston North 4442, New Zealand;3. Innovative Farm Systems Group, AgResearch, Lincoln, Canterbury 8140, New Zealand;1. Instituto de Desarrollo Tecnológico para la Industria Química (INTEC, UNL-CONICET), Güemes 3450, 3000 Santa Fe, Argentina;2. Facultad Regional Santa Fe, Universidad Tecnológica Nacional, Lavaise 610, 3000 Santa Fe, Argentina;3. Polymer Institute, Slovak Academy of Science, Dúbravská cesta 9, 84236 Bratislava, Slovakia;1. Helmholtz-Center Berlin for Materials and Energy, Hahn Meitner-Platz 1, 14109 Berlin, Germany;2. Institute for Chemistry and Biochemistry, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany;3. Institute of Macromolecular Chemistry, Albert-Ludwigs Universität of Freiburg, Stefan Meier-Str. 3, 79104 Freiburg, Germany;4. Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH at MLZ, Lichtenbergstraße, 185747 Garching, Germany;5. Institut Laue-Langevin, 71 Avenue des Martyrs – CS 20156, 38042 Grenoble, Cedex 9, France;6. Department of Physics, Humboldt Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany;7. Helmholtz Virtual Institute, Multifunctional Materials in Medicine, Berlin, Teltow, Germany |
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| Abstract: | A novel two-sense support for flexural tests has been designed and manufactured in Ikerlan. The aim of this support is to do two-sense bending fatigue tests. In order to reduce the displacement corresponding to a given stress, a novel test configuration, designated as five-point bending, is modelled analytically. Basically, it is a three-point configuration with two supports at the ends that exert forces in the same sense as the applied load. In this way, a partial clamping is obtained that can be modelled by concentrated loads. The model has been checked carrying out quasi-static three-point and five-point bending tests at different spans in unidirectional carbon/epoxy composite specimens. Flexural modulus and the out-of-plane shear modulus have been obtained by linear regression in both cases, after having obtained experimentally the stiffness of the system. |
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| Keywords: | Three-point bending Five-point bending Two-sense bending test |
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