NONLINEAR BUCKLING ANALYSIS OF STRUCTURE BASED ON CONTACT SYNERGY

The contact friction problem in structural engineering is very common. Contact synergy makes the solution of nonlinear buckling become more difficulty. From this practical problem, a non-linear finite element equilibrium equation based on the contact interface is build by the finite element method of sub-structure using a cohesion degree of freedom in this paper, and the contact constraint dealt with by the augmented Lagrangian multiplier method is combined with the cylindrical arc-length method combining the problem to track the entire solving process of the nonlinear buckling. The results of number examples show that the contact synergy has a distinct effect to the solving possess of nonlinear buckling, and it is necessary to consider the contact synergy effect in the practical design.