PENALTY FUNCTION METHOD FOR GEOMETRICALLY NONLINEAR BUCKLING ANALYSIS OF IMPERFECT TRUSS WITH MULTI-FREEDOM CONSTRAINTS BASED ON MIXED FEM

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 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 dependent boundary rela

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