对称角铺设层合板层间应力数值分析

Interlaminar stress is one of the important factors causing laminate failure. The thorough analysis of interlaminar stress’ magnitude and its distribution show to be significant for design of composite laminates. The paper focuses on the investigation of interlaminar stress characteristics of the symmetric angle-ply laminated rectangular plates [± ]s under uniaxial tensile loading. 3D solid element Solid46 is used in the commercial finite element software ANSYS for establishing geometric modeling and numerical analysis with linear-elastic anisotropic assumption in single ply. The interlaminar stress distribution near the edge of the typically symmetric angle-ply laminated plates [±25]s is discussed. The results show that the normal stress is maximum at corner points, while shear stress is relatively higher at free edge and decreased at corner points. The effect of off-axis angle  on interlaminar stress is studied finally, and the relationship between maximum interlaminar stress and layer angle is achieved.