Do we need to impose constraints at acceleration level in the nonsmooth generalized-α method?

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

Congreso; ECCOMAS Multibody Dynamics Conference 2021 ONLINE; 2021

Budapest University of Technology and Economics

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