About the nonsmooth generalized-alpha method and contact constraints at acceleration level.

ALEJANDRO COSIMO; FEDERICO J. CAVALIERI; ALBERTO CARDONA; OLIVIER BRÜLS

Paris

Congreso; 14th World Congress on Computational Mechanics (WCCM) and ECCOMAS; 2021

IACM-ECCOMAS

In this work, we investigate the incorporation of unilateral constraints at acceleration level in the context of the decoupled  nonsmooth generalized-alpha time integrator. The resulting scheme thus benefits both from the robustness of the decoupled version of the NSGA methodand from the improved numerical properties brought by the acceleration constraints. Furthermore, the method is applied to atest-case involving contacts with curved surfaces and a performance and robustness analysis reveals the importance of imposingconstraints at acceleration level when dealing with contacts between curved geometries.