Penalty function method for geometrically nonlinear buckling analysis of imperfect truss with multi-freedom constraints based on mixed FEM
This paper is concerned with the approach duke waves and fades to implementing the Penalty function method for imposing multi-freedom constraints in geometrically nonlinear analysis of imperfect trusses based on mixed finite element formulation.Using a finite element model based on displacement formulation, it is required to incorporate both the de