Analytical method of dynamic properties of FRP based on micromechanical level

作者：Qi Wenkai^*; Xu Xiaoqiang

来源：Chinese Journal of Aeronautics, 2015, 28(3): 939-945.

DOI：10.1016/j.cja.2015.03.008

• Bridging model
• Complex moduli
• FRP
• Interphase
• Loss factor

A mathematic model is proposed for predicting the dynamic properties of fiber reinforced plastic composites (FRP) with interphase. Dynamic properties mainly include loss factors and elastic moduli. The results of elastic moduli from the present model are compared with other models. Elastic moduli E-11, E-22, G(12), G(23) and loss factors eta(11), eta(22,) eta(12) and eta(23) of FRP are calculated and a study of the effect of elastic modulus eta(I) and loss factor eta(I) of interphase on dynamic properties in FRP is carried out here. In this paper, E-11 linearly increases with E-I, but the growth rate is slow. E-22, G(12), G(23) increase rapidly for lower value of E-I. The longitudinal loss factor eta(11) decreases with the increase of E-I in the case of eta(I)< 0.0026. But eta(11) linearly increases with E-I in larger range of eta(I), eta(I) >= 0.0026. On the contrary, transverse loss factor eta(22), transverse shear loss factors eta(23) and longitudinal shear loss factors eta(12) increase with increase of E-I in the case of lower value of eta(I), but decreases at larger value of eta(I). And they also show insensitivity to E-I at higher value.

• 出版日期2015-6
• 单位南京航空航天大学