Abstract: In this note we illustrate how to obtain the full family of Newmark’s time integration algorithms within a rigorous variational framework, i.e., by discretizing suitably defined extended functionals, ...

Abstract: A constitutive model that is able to follow softening behavior in terms of stress and strain variables is presented. The model, when used in a finite element context, gives mesh‐insensitive results. It is based on the ...

Abstract: A nonlinear interface constitutive law is formulated for modeling the mechanical behavior of the periodontal ligament. This gives an accurate interpolation of the few available experimental results ...

Abstract: Necessary and sufficient conditions for the occurrence of a bifurcation in the equilibrium path of a discrete structural system are established as a consequence of the degeneracy of the solution of the rate problem at a ...