It is well known that the classical one-pass node-to-segment algorithms for the enforcement of contact constraints fail the contact patch test. The situation is particularly critical when using the penalty method. In a recent study, the authors proposed a modified one-pass node-to-segment algorithm able to pass the contact patch test also in conjunction with the penalty method. However, in a general situ- ation the pressure distribution transferred across a contact surface is non-uniform. Hence, even for a contact element which passes the contact patch test under a uni- form distribution of the contact pressures, the transfer of a non-uniform state of stress across the contact surface may give rise to disturbances related to the discret- ization. Such disturbances introduce local solution errors and ultimately affect the accuracy of the analysis. This paper, following on from the previous study, develops an enhanced node-to-segment formulation able to pass a modified version of the contact patch test whereby a linear distribution of pressures has to be transmitted across the contact surface.

The contact patch test for linear contact pressure distributions in 2D frictionless contact / Zavarise, G.; De Lorenzis, L. - In: Trends in Computational Contact MechanicsSTAMPA. - BERLIN : Springer, 2011. - ISBN 9783642221668. - pp. 79-100 [10.1007/978-3-642-22167-5_5]

The contact patch test for linear contact pressure distributions in 2D frictionless contact

G. Zavarise;
2011

Abstract

It is well known that the classical one-pass node-to-segment algorithms for the enforcement of contact constraints fail the contact patch test. The situation is particularly critical when using the penalty method. In a recent study, the authors proposed a modified one-pass node-to-segment algorithm able to pass the contact patch test also in conjunction with the penalty method. However, in a general situ- ation the pressure distribution transferred across a contact surface is non-uniform. Hence, even for a contact element which passes the contact patch test under a uni- form distribution of the contact pressures, the transfer of a non-uniform state of stress across the contact surface may give rise to disturbances related to the discret- ization. Such disturbances introduce local solution errors and ultimately affect the accuracy of the analysis. This paper, following on from the previous study, develops an enhanced node-to-segment formulation able to pass a modified version of the contact patch test whereby a linear distribution of pressures has to be transmitted across the contact surface.
2011
9783642221668
Trends in Computational Contact Mechanics
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2700650
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo