234 Improvement of the Two-layer Type Active Laminate by Surface Oxidization of the Aluminum Layer

Abstract

This paper describes improvement of the active laminate in bonding strength by using the oxide film of aluminum fbr insulation ． Conventional types of the active laminates were made by hot pressing of an aluminum plate as high coe 飾 ient of the al expansion ( CTE )material ， a unidirectional carbon fiber reinforced plastics ( CFRP )prepreg as low CTE and electric resistance heater ， and a unidirectional glass fiber reinforced plastics ( GFRP ) prepreg as low CTE and insulating material ． However ， the insulating layer reduces actuation capability of the active laminates ． Therefc ｝ re a two −layer type active laminate was made by using anodized aluminum plate as high CTE and insulator material 血 stead of using GFRP ． In this study ， the effect of oxide film thickness of the aluminum plate on the fracture energy of tle two − layer type active laminate was investigated ．