Vibration Damping and Toughness Evaluations of CFRP Laminates with Smart Units Using Viscoelastic and Piezoelectric Films

本文采用有限元数值分析方法，以模态应变能法为主要手段，研究了粘弹性和压电薄膜智能单元对CFRP层合板振动阻尼和韧性的改善机理。此外，实际的CFRP层合板与阻尼片插入层之间，然后进行了冲击锤击和落锤试验的标本，这当然表明实验评估的有效性，目前的层合结构技术的可行性。

In this study, improvement mechanism of vibration damping and toughness of CFRP laminates with so-called smart units using visoelastic and piezoelectric films were investigated in detail by using FEM numerical analysis mainly with the aid of the modal strain energy approach. In addition, actual CFRP laminates with damping sheets inserted between the plies were prepared and then impact hammering and drop weight tests were carried out to the specimens, which certainly showed feasibility for experimentally evaluating a validity of the present laminated structural technology.