A single-variable approach for layered beams with imperfect interfaces

Abstract. The first-order shear deformable laminated beam problem is reformulated in terms of a fictitious bending displacement as primal variable. A fourth-order differential equation governs the with two additional unknown constants coming from integration longitudinal displacement. With classical six boundary conditions, complete and well posed. An isogeometric collocation scheme developed to solve numerically. formulation completely locking-free satisfies high continuity requirements for approximation functions. results an exemplary structure confirm validity good performance method, which preliminary single variable reformulation more accurate zig-zag model laminates perfect imperfect interfaces.