Abstract
This work presents an investigation on wear prediction of multibody system including dry revolute clearance joint using a computational methodology. A procedure to analyze multibody system in which wear is present at revolute joints is presented. The study involves integrating a dynamics model of the mutibody system with clearance joint into a wear prediction procedure. The contact model in clearance joint is established using a hybrid nonlinear contact force model and the friction effect is considered by using a modified Coulomb friction model. The wear modeling of revolute clearance joint in multibody systems is presented based on the Archard's wear model. Finally, an academic four-bar multibody mechanical system with revolute clearance joint is used as numerical example application to perform the investigation.
Highlights
Clearances in mechanism are unavoidable due to assemblage, manufacturing errors and wear
It is known that the performance of mechanisms is degraded by the presence of the clearance. These clearances modify the dynamic response of the system, justify the deviations between the numerical predictions and experimental measurements and eventually lead to important deviations between the projected performance of mechanisms and their real outcome (Bauchau and Rodriguez, 2012; Erkaya and Uzmay, 2010, 2012; Flores et al, 2004, 2006, 2010; Garcia, 2005; Schwab et al, 2012; Tian et al, 2009)
A four-bar multibody mechanical system is used as numerical example application to perform the investigation
Summary
Clearances in mechanism are unavoidable due to assemblage, manufacturing errors and wear. A well-known slider-crank mechanism with a revolute clearance joint was used to perform the study. Most researches are based on the assumption of regular clearance model, which assumes that wear is not nonexistent in the joint, and the findings may be limited to the idealized case in which wear is not considered. The objective of this work is to study the wear phenomenon of dry revolute clearance joint in multibody systems based on the Archard’s wear model using a computational methodology.
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