The crush behavior of glass fiber reinforced plastic sections |
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| Affiliation: | 1. Grupo de Elasticidad y Resistencia de Materiales, Escuela Técnica Superior de Ingeniería, Universidad de Sevilla Camino de los Descubrimienos s/n, 41092, Sevilla, Spain;2. Department of Mechanical Engineering, Industrial Doctorate Centre in Machining Science, Computer-Aided Aerospace & Mechanical Engineering (CA2M) Research Group, The University of Sheffield, Sir Frederick Mappin Building, Mappin Street, S1 3JD Sheffield, United Kingdom;1. Institute of Production Engineering and Materials Testing, Ulm University of Applied Sciences, Prittwitzstraße 10, 89075 Ulm, Germany;2. Materials Research Institute, Aalen University of Applied Sciences, Beethovenstraße 1, 73430 Aalen, Germany;3. Faculty of Manufacturing Technologies TU of Košice, Bayerova 1, 080 01 Prešov, Slovak Republic;4. The Czech Academy of Sciences, Institute of Geonics, Ostrava - Poruba, Czech Republic;5. Steinbeis Consulting Center High-Pressure Waterjet Technology, Am Wachberg 24, 86497 Horgau, Germany;1. Faculty of Mechanical Engineering, Shahrood University of Technology, Shahrood, 3619995161, Iran;2. Department of Mechanical Engineering, University of Manitoba, 15 Gillson Street, Winnipeg, MB, R3T 5V6, Canada;1. DEMec, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal;2. Optics and Experimental Mechanics Laboratory, INEGI, Campus da FEUP, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal |
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| Abstract: | The crush response of glass fiber reinforced plastic tubes, of cylindrical, square and rectangular section, made from unidirectional tape with various alternating 0° and 90° lay-ups, and also of small samples cut from these tubes, was studied with particular reference to the effects of the geometry of the crush trigger initiator. It was found that the propagation of delamination cracks contributed little to the energy absorption capacity, most of the crush resistance being derived from the development of kink bands in the fiber structure. The crush resistance of square tubes with thinner walls was largely provided by the corners. As the wall thickness increased, the planar portions contributed more to the crush resistance. Approximate estimates of the specific energy may be made from crush tests of simple flat sections. The trigger geometry alters the energy absorption capacity by the extent to which it generates deformation flaws which can then propagate within the wall structure.Softer crush anvils reduce the effectiveness of the trigger crush initiator and can lead to global failure of the section, rather than to stable, progressive crush. |
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