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Experimental and finite element studies on hot sizing process for L-shaped composite beams
Affiliation:1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China;2. School of Transportation Science and Engineering, Beihang University, Beijing 100191, China;3. Aeronautical Manufacturing Technology Institute, Shanghai Aircraft Manufacturing Co, Shanghai 200436, China;1. School of Science, Wuhan University of Technology, Wuhan 430070, China;2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;3. Department of Mechanical Engineering, University of Bristol, Bristol BS8 1TR, UK;4. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China;1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, China;2. Joint Center for Intelligent New Energy Vehicle, Shanghai, China;3. National Engineering Research Center for Equipment and Technology of Cold Rolling Strip, Yanshan University, Qinhuangdao, Hebei, China;1. Institute for Carbon Composites, Technische Universität München, Faculty of Mechanical Engineering, Boltzmannstrasse 15, D-85748 Garching b. München, Germany;2. Department of Mechanical Engineering, McGill University, 817 Sherbrooke St. West, Montreal, Quebec H3A 0C3, Canada;1. Institute for Composites Science Innovation (InCSI), School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, PR China;2. School of Mechanical and Instrument Engineering, Xi''an University of Technology, Xi''an, 710048, Shaanxi, China
Abstract:This work aims at developing a hot sizing process on composite materials to correct the profiles of composite structures during manufacture. Hot sizing experiments were carried out at 150 °C with different sizing loads and hot sizing periods for L-shaped composite beams made of carbon fiber plain-weave fabric and epoxy resin. To predict the springback in hot sizing process, a corresponding finite element simulation method was developed using stress relaxation equations determined at the same temperature. Excellent agreements between the predicted and observed results were obtained. The effects of the component thickness and 45° ply percentage on the springback rate were investigated by simulation. Springback rate in hot sizing process on composite materials ranges from 60% to 95%. In conclusion hot sizing process is proved to be a valid method for compensation for the process-induced deformation (PID) of L-shaped composite beams.
Keywords:A  Polymer-matrix composites (PMCs)  B  Creep  C  Finite element analysis (FEA)
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