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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 23
Edited by: M. Papadrakakis and B.H.V. Topping
Paper IV.1

On Numerical Analysis of Thermomechanical Contact Problems

G. Zavarise*, B.A. Schrefler* and P. Wriggers#

*Istituto di Scienza e Tecnica delle Costruzioni, Facolta di Ingegneria, Universita di Padova, Italy
#Institut für Mechanik-Technische Hochschule, Darmstadt, Germany

Full Bibliographic Reference for this paper
G. Zavarise, B.A. Schrefler, P. Wriggers, "On Numerical Analysis of Thermomechanical Contact Problems", in M. Papadrakakis, B.H.V. Topping, (Editors), "Advances in Simulation and Interaction Techniques", Civil-Comp Press, Edinburgh, UK, pp 157-163, 1994. doi:10.4203/ccp.23.4.1
In this paper a micromechanical formulation is used in combination with augmented lagrangian technique for the analysis of thermomechanical contact problems. Axial, tangential and thermal stiffnesses are determined using nonlinear relationships based on statistical characterisation of contact microscophical asperities. Ill-conditioning is avoided using augmented lagrangian technique. This means that microscopical laws are not used to determine the target contact stiffness, but are used to force the target contact approach. Correct solutions are obtained by imposing contact forces as external ones, and convergence is achieved when the target approach is satisfied. Symmetrization of the contact contribution is also considered within the augmentation loop, and different strategies taking into account thermal coupling are compared.

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