DMA Behaviors of CFRP/SDR Sandwich Laminates with Damping Rubber Sheet

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  • 制振ゴムシートを有するＣＦＲＰサンドイッチ積層板の動的粘弾性特性
  • セイシン ゴムシート オ ユウスル CFRP サンドイッチ セキソウバン ノ ドウテキネンダンセイ トクセイ

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Carbon fiber reinforced Plastics (CFRP) has been well developed for many engineering structural components in the aircraft, automotive and modern space industries with its light-weight and excellent mechanical properties in the last few decades. But it is poor in vibration and noise reduction as same as metal materials. In this paper, the innovative CFRP/SDR sandwich laminates with damping rubber sheet were developed and their damping behavior was investigated by the dynamic mechanical analysis (DMA) under tensile, shear and bending vibration mode, respectively. As a result, it is shown that the damping properties of the developed 8 types of CFRP/SDR sandwich laminates depend deeply on the fiber orientation of lamina, the property of rubber sheet and its layer number and sequence. The dependence of damping property on temperature and frequency is discussed in detail. The loss factors for the developed materials are over 0.2 under shear vibration mode and over 0.3 under bending vibration mode, even reaching 0.45 for [02/SDR/904/SDR/02] laminates. It is also clear that the damping parameters depend on the vibration mode in the test. This is especially important for the CFRP based damping materials.

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