Characterization of acoustic-absorbing inter/intra-ply hybrid laminated composites under dynamic loading |
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| Authors: | Rui Wang Ruosi Yan Ching-Wen Lou Jia-Horng Lin |
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| Institution: | 1.School of Textiles,Tianjin Polytechnic University,Tianjin,China;2.Institute of Biomedical Engineering and Materials Science,Central Taiwan University of Science and Technology,Taichung,Taiwan;3.Laboratory of Fiber Application and Manufacturing, Department of Fiber and Composite Materials,Feng Chia University,Taichung,Taiwan;4.School of Chinese Medicine,China Medical University,Taichung,Taiwan;5.Department of Fashion Design,Asia University,Taichung,Taiwan |
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| Abstract: | This study prepared the novel laminated composites composed of a cushioning layer with double identical hybrid surface reinforcement laminates based on Kevlar fiber (KF)/carbon fiber (CF) and evaluated their acoustic and mechanical performance. The effects of reinforcing fiber type, fiber blending ratio, needle-punching frequency, and laminated sequence on the static bursting, dynamic cushioning and acoustic absorption ability of the composites were individually investigated. Results revealed that the cushioning capacity of the KF-hybrid composites was always superior to that of the CF-hybrid composites. The dynamic cushioning capacity of a hybrid composites with the cushioning layer at the intermediate position was superior to that of samples with a cushioning layer at the top and bottom positions. The CF-hybrid composites exhibited higher acoustic absorption coefficient at low (125 to 500 Hz) to mid frequencies (500 to 2000 Hz) but a lower value at high frequencies (2000 to 4000 Hz) than the KF-hybrid composites. The acoustic absorption curve and the corresponding sound absorption average were significantly affected by the needle-punching frequency. This influence diminished with an increase in needle-punching frequency. The cushioning layer at the top position enhanced the absorption ability at low to mid frequencies. Thus, the hybrid construction with a cushioning layer at the middle position and double hybrid laminated cover plies was the optimal structure for acoustic absorption. |
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