Simulation of molten metal through a unidirectional fibrous preform during MMC processing |
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| Authors: | Chih-Yuan Chang |
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| Affiliation: | 1. School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, PR China;2. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, PR China;1. Department of Mechanical Engineering, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands;2. Materials innovation institute (M2i), Delft, The Netherlands;1. Jinzhong University, Jinzhong 030619, PR China;2. College of Mechanical and Electrical Engineering, Yangtze Normal University, Chong Qing 408100, PR China;3. University of Chinese Academy of Sciences, Beijing 100039, PR China;1. State Key Laboratory of Superhard Materials, School of Materials Science and Engineering and Key Laboratory of Automobile Materials, MOE, Jilin University, Changchun 130012, People''s Republic of China;2. AECC Beijing Institute of Aeronautical Materials, Beijing 81-15 110095, People''s Republic of China |
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| Abstract: | The injection of molten metal through a fibrous preform is one of the techniques used to manufacture metal matrix composites (MMCs). The flow of liquid metal through a fibrous preform constitutes a moving boundary problem of fluid mechanics in a porous medium. In the present model, the isothermal infiltration process is considered. The numerical algorithm, based on the body-fitted finite element method (FEM), can precisely deal with the transient and irregular physical domains and calculate the flow behavior. Numerical results show that the infiltration pattern is strongly influenced by the nature of the preform. The injection flow rate under constant applied pressure decreases with the infiltration time. The effect of the preform orientation on infiltration pattern is also discussed. Similarity analysis shows that the infiltration time is inversely proportional to the ratio of applied pressure to liquid viscosity for the same type of preform. |
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