Mesomechanics Finite Element Analysis Of Interface Mechanical Properties Of Fiber Reinforced Resin Based Composite

Fiber reinforced resin based composite displays competing advantage increasingly in national economy and defence. Studying thoroughly the influence rule of characteristics and bonding microcosmic characteristics of interface effect on macroscopical mechanical properties is a key to get composite with high performance. This paper is engaged in research as follows:1,Normal stress and shearing stress are analysed in the process of drawing fiber, including fiber adhesion completely, adhesion slippage and debonding thoroughly. Also, the criterion of fiber debonding and fracture is given in this paper.2,Using nonlinear finite element software ANSYS, mechanical model of fiber drawing is built, and the changes rule of shearing stress, axial and radial stress of fiber/base interface is discussed separately when the depth of embedment of fiber and base packing thickness are different.3,The numerical simulation of composite tip net is adopted by means of geometry nonlinear method; The stress and deformation of tip net are analysed according to tip net of glass fiber reinforced resinic composite.Conclusions are reached as follows:1,The major principal stress and shearing stress are declining gradually, simultaneously the rigid body displacement decreases with the increase of the depth of embedment of fiber and base packing thickness. And the distributions trend of them is same approximately, the maximum value occurs at base of fiber embedment entrance.2,Shearing stress, axial and radial stress are declining gradually with the increase of the depth of embedment of fiber and base packing thickness, and the stress concentration occurs the entrance of fiber embedment.3,The maximum of equivalent stress appears about fulcrum of anchor bar under the condition of surface load, also the maximum of displacement takes place at the middle of tip net.