A study on the failure mechanisms of carbon fiber/epoxy composite laminates using acoustic emission |
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| Affiliation: | 1. Institute of Chemical Machinery and Process Equipment, Zhejiang University, Hangzhou 310027, Zhejiang Province, China;2. Hangzhou Special Equipment Inspection Institute, Zhejiang, Hangzhou 310003, China;1. Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201600, China;2. Department of Metallurgy and Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, B-3001 Leuven, Belgium;3. Department of Architecture, Built Environment and Construction Engineering, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy;1. Department of Mechanical Engineering, Bogazici University, Bebek, 34342 Istanbul, Turkey;2. Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, 3001 Leuven, Belgium;1. Department A.B.C., Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy;2. Department of Materials Engineering, K.U. Leuven, Kasteelpark Arenberg 44, B-3001 Leuven, Belgium;1. College of Quality and Technical Supervision, Hebei University, Baoding 071002, China;2. Non-destructive Testing Laboratory, Hebei University, Baoding 071002, China;1. Non-destructive Testing Lab, Department of Mechanical Engineering, Amirkabir University of Technology, 424 Hafez Ave, 15914 Tehran, Iran;2. Advanced Composites Centre for Innovation and Science, University of Bristol, Bristol BS8 1TR, UK;3. MTA–BME Research Group for Composite Science and Technology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary |
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| Abstract: | The complex failure mechanisms that are commonly considered as the distinctive characteristic of composites are being amenable to nondestructive test advance. This research adopts the acoustic emission technique to study the failure mechanisms and damage evolution of carbon fiber/epoxy composite laminates. Effects of different lay-up patterns and hole sizes on the acoustic emission response are studied to set up the mapping between the failure properties and the acoustic signal features such as the energy, counting and amplitude. Moreover, the microscopic properties of different composite specimens after fracture are watched and analyzed by scanning electron microscope (SEM). Based on the mapping conception, the controlling microscopic failure mechanisms of composites including the splitting matrix cracking, fiber/matrix interface debonding, fiber pull-out and breakage as well as delamination are identified. It is expected the influence of complex lay-up patterns and sizes on the damage and failure properties of composites is represented by creating true mapping based on the acoustic emission technique. |
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