Lamination theory incorporating the effect of interlayer deformation
Bai QSh; Murakami Sumio; Kanagawa Yasushi; Tanaka Kohhei
Abstract:The effect of transverse shear deformation induced by interlaminar stress on the in-plane behavior of angle-ply laminates is investigated. A laminate model is developed by incorporating the transverse deformation of interlayers. A linear shear slip theory is employed to describe the relation between interlaminar stress and the transverse shear deformation of the interlayer. The classical lamination theory based on a perfect bonding assumption is elaborated by allowing for interlayer shear slip. The resulting theory is applied to a series of angle-ply laminates tubes. It was observed that the transverse shear deformation affects significantly the mechanical behavior of the angle-ply laminates, especially for the laminates with weak interface bonding. Key Words:lamination theory, angle^ply laminate, stiffness mismatch, interlaminar stress, equavalent interlayer