Load-bearing characteristics of marine complex sandwich composites considering unequal elastic modulus in tension and compression |
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| Institution: | 1. Key Laboratory of High Performance Ship Technology (Wuhan University of Technology), Ministry of Education, Wuhan, 430063, China;2. School of Naval Architecture, Ocean and Energy Power Engineering, Wuhan University of Technology, Wuhan, 430063, China;3. Marine Design & Research Institute of China, Shanghai, 200011, China;1. College of Information Science and Technology, Shanghai Ocean University, Shanghai 201306, China;2. Department of Architecture and Civil Engineering, City University of Hong Kong, Kowloon, Hong Kong;3. City University of Hong Kong, Shenzhen Research Institute Building, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, China;1. College of Information Science and Technology, Shanghai Ocean University, Shanghai 201306, China;2. Department of Architecture and Civil Engineering, City University of Hong Kong, Kowloon, Hong Kong;3. City University of Hong Kong Shenzhen Research Institute Building, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, China;1. College of Information Science and Technology, Shanghai Ocean University, Shanghai 201306, China;2. Department of Architecture and Civil Engineering, City University of Hong Kong, Kowloon, Hong Kong Special Administrative Region;3. City University of Hong Kong Shenzhen Research Institute Building, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, China;4. Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123, USA;1. College of Information Science and Technology, Shanghai Ocean University, Shanghai, 201306, China;2. Department of Architecture and Civil Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR, China;3. City University of Hong Kong Shenzhen Research Institute Building, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, China;4. College of Marine Science, Shanghai Ocean University, Shanghai, 201306, China;5. Shanghai Engineering Research Center of Hadal Science and Technology, Shanghai, 201306, China;1. DLR Institute for Maritime Energy Systems, Geesthacht, Germany;2. Hamburg University of Technology, Hamburg, Germany;3. 50Hertz Transmission GmbH, Berlin, Germany;1. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China;2. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China |
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| Abstract: | The panel and core materials of sandwich composite usually have the characteristics of unequal elastic modulus in tension and compression. However, in the numerical calculation of sandwich composite, it is usually considered as the material with the same tensile modulus or compression modulus, which often leads to larger calculation errors. The test results show that when the elastic modulus of tension and compression is about 10 times different, the maximum calculated stress and maximum deflection will be more than twice different. In view of the complexity of sandwich composite structure, based on the bi-modulus model of laminated plates, a simplified theoretical formula and numerical calculation method are proposed for bi-modulus sandwich composite structures in this paper. Furthermore, the accuracy of the proposed numerical calculation method of bi-module is verified by the experimental study of composite single-layer plate structure and sandwich composite cabin structure. The results show that the error between the improved numerical calculation method and the experimental measurement results is basically within 6%. Meanwhile, the numerical method based on field variables has wide application range and high convergence, and can be used to calculate complex marine composite structures. |
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| Keywords: | Marine sandwich composite Bi-modulus Stiffened plate Material performance test |
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