Hygrothermal ageing effects on the static fatigue of glass/epoxy composites |
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| Affiliation: | 1. Laboratoire d''Etudes des Matériaux Plastiques et Bromatériaux, URA CNRS 507—Université C. Bernard, 69622 Villeurbanne Cedex, France;2. Département Matériaux Mécanique Physique, URA CNRS 447—Ecole Centrale de Lyon, BP 163, 69131 Ecully Cedex, France;1. Rock Mechanics Expert, Mahab Ghodss Consulting Engineering, Dastgerdi Ave, Tehran, Iran;2. Assistant Professor, Department of Mining Engineering, Isfahan University of Technology (IUT), Isfahan, Iran;1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China;2. School of Mechanical Engineering, Tianjin University of Technology, Tianjin 300191, PR China;1. Institute of Mineral Processing Machines, TU Bergakademie Freiberg, Germany;2. Institute of Geotechnics, TU Bergakademie Freiberg, Germany;1. Department of Mining Engineering, Isfahan University of Technology, Isfahan, 8415683111, Iran;2. Scholarship of Tishreen university, Latakia, Syria;1. São Paulo State University (Unesp), Materials and Technology Department, Fatigue and Aeronautic Materials Research Group, Guaratinguetá, SP, Brazil;2. Aerospace Structures and Materials Department, Faculty of Aerospace Engineering, Delft University of Technology, P.O. Box 5058, 2600 GB Delft, the Netherlands;3. São Paulo State University (Unesp), Institute of Science and Technology, São José dos Campos, SP, Brazil;1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;2. School of Astronautics, Harbin Institute of Technology, Harbin 150001, China;3. Shenyang University, Shenyang 110016, China |
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| Abstract: | A study of the effects of water ageing on the static fatigue behaviour of unidirectional glass/epoxy composites is presented. The failure mechanisms associated with fatigue damage were investigated under three-point bending loading. Depending on the ageing temperature, two failure features were identified: either fibre microbuckling on the compressive side of the specimen, or progressive cracking on the tensile side. Microbuckling has been found to be related to the reversible plasticization of the epoxy matrix, as measured by dynamic mechanical thermal analysis. On the other hand, tensile failure was associated with an irreversible weakening of the fibres and interfaces at elevated ageing temperatures. Some similarity is identified between damage processes in static and dynamic bending fatigue. |
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