Effects of temperature on the pinned joint bearing strength and damages of composite laminates are investigated experimentally. The material used in this study is CF/Epoxy T800H/#3631 (Toray) with stacking sequences of quasi-isotropic [0/45/-45/90]
3S and [90/-45/45/0]
3S. A semi-circular notched specimen is adopted instead of the well-known double lap joint specimen recommended by JIS and ASTM standards. The present smaller specimen has the advantage in heat retention and material cost. In addition, it simplifies the damage analysis since only the bearing failure occurs. Loading tests are conducted at room (25°C), high (150°C) and low (-100°C) temperatures to obtain the load-displacement response, bearing strength and external damages. Moreover, the threedimensional evolution of microscopic damages is observed in detail and the characteristic relationship between the internal damages and environmental temperatures is discussed.
抄録全体を表示