Hybrid finite element formulation for geometrically nonlinear buckling analysis of truss with initial length imperfection

This paper presents a novel hybrid FEM-based approach for nonlinear buckling analysis of truss with initial length imperfection. The contribution deals establishing two types finite element (perfection and imperfection element) considering large displacement based on formulation mixed formulation. Therefore, the global equation system is developed by assembling perfection elements. incremental-iterative algorithm arc-length method used to establish calculation programs solving geometrically Using written program, numerical test presented investigate equilibrium path plan member