制振CFRP積層板減衰特性に及ぼす積層構成の影響

抄録

Carbon fiber reinforced plastics (CFRP) have orthotropic material properties and are usually used as laminated structures. Therefore, their mechanical properties can be varied by changing their fiber orientation angles according to the purpose of their use. However, in the case of CFRP that has poor vibration damping, resonance problems become easily crucial and hence it is necessary to suppress the vibration occurred in the CFRP laminates. The present study proposes to improve the value of coefficient of mode loss by introducing so-called damping sheets. Fiber orientation angle and insert point of damping sheets are decided from numerical results (1280 patterns) in terms of a few lower natural frequencies, modal loss factors and mode shapes numerically obtained by the general purpose finite element method(FEM) code, ANSYS.