An implicit/explicit integration scheme to increase computability of non-linear material and contact/friction problems

J. OLIVER,; A E. HUESPE; J.C. CANTE

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING

ELSEVIER SCIENCE SA

Año: 2008 vol. 197 p. 1865 - 1889

0045-7825

An implicit/explicit integration scheme for non-linear constitutive models is presented. It aims at providing additional computabilityto those solid mechanics problems were robustness is an important issue, i.e. material failure models equipped with strain softening, softmaterials, contact-friction models, etc., although it can also provide important advantages, in terms of computational cost, with respectto purely implicit integration schemes. The proposed scheme is presented based on general families of constitutive models (continuumdamage and elasto-plasticity) and its properties, in terms of robustness and accuracy, are analytically derived and computationallyassessed by means of numerical simulations. An adaptive time stepping algorithm, based on a priori control of the committed errorand the application of the proposed scheme to contact/friction interfaces are also presented.