Stable time step estimates for NURBS-based explicit dynamics
We propose a study of time step estimates for explicit dynamics. We examine the influence of the order and the regularity of the shape functions on the estimates. The accuracy of newly proposed estimates is assessed on 1D and 2D problems. Elements on the boundary penalize the time step with smooth B-splines. We propose to unclamp the knot vector to increase the size of the critical time step.
stable time step explicit dynamics isogeometric analysis b-splines/nurbs mass lumping