Advanced computational methods for the simulation of lubrified contacts

• Grant number: 11/24147-5
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: April 01, 2012
• End date: February 29, 2016
• Field of knowledge: Engineering - Mechanical Engineering - Transport Phenomena
• Principal Investigator: Gustavo Carlos Buscaglia
• Grantee: Hugo Marcial Checo Silva
• Host Institution: Instituto de Ciências Matemáticas e de Computação (ICMC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

This project aims at developping mathematical models and numerical techniques for the simulation of lubrified contacts under cavitation conditions. Applications are numerous both in biomechanics (e.g., joints) and the industry (e.g., bearings in engines and other automotive applications). Classical lubrication models are inadequate for several problems involving free surfaces, for example for the simulation of the piston ring / liner contact. The proponent has recently introduced new models aimed at solving these inadequacies but several questions and implementation challenges arise. Firstly, extension of an existing prototype to multidimensional problems is an issue. Dealing with nonlinearities and changes in the topology of the cavitated region will be addressed. A robust methodology that allows for the simulation of joints and bearings of realistic geometry and dynamics is one of the main goals. Secondly, improved modelling of the rupture condition and transport in the cavitated area is needed. Finally, application of the techniques for the design and optimization of microtextured surfaces with improved performance (in terms of wear, friction and lubricant loss) is the long-term goal.This project contributes to the INCT on Medicine Assisted by Scientific Computing and to the brazilian efforts on the improvement of FLEX engines.

Scientific publications

(5)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

CHECO, HUGO M.; JARAMILLO, ALFREDO; JAI, MOHAMMED; BUSCAGLIA, GUSTAVO C.. Texture-induced cavitation bubbles and friction reduction in the Elrod-Adams model. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, v. 229, n. 4, p. 15-pg., 2015-04-01. (11/24147-5, 12/14481-8)

CHECO, HUGO M.; JARAMILLO, ALFREDO; JAI, MOHAMMED; BUSCAGLIA, GUSTAVO C.. Texture-induced cavitation bubbles and friction reduction in the Elrod-Adams model. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, v. 229, n. 4, SI, p. 478-492, APR 2015. (12/14481-8, 11/24147-5)

CHECO, HUGO M.; JARAMILLO, ALFREDO; AUSAS, ROBERTO F.; BUSCAGLIA, GUSTAVO C.. The lubrication approximation of the friction force for the simulation of measured surfaces. TRIBOLOGY INTERNATIONAL, v. 97, p. 390-399, MAY 2016. (14/19249-1, 11/24147-5)

CHECO, HUGO M.; AUSAS, ROBERTO F.; JAI, MOHAMMED; CADALEN, JEAN-PAUL; CHOUKROUN, FRANCK; BUSCAGLIA, GUSTAVO C.. Moving textures: Simulation of a ring sliding on a textured liner. TRIBOLOGY INTERNATIONAL, v. 72, p. 131-142, APR 2014. (12/14481-8, 11/24147-5)

CHECO, H. M.; JARAMILLO, A.; AUSAS, R. F.; JAI, M.; BUSCAGLIA, G. C.; RIPA, M; RIPEANU, RG; CICONE, T. Down to the roughness scale assessment of piston-ring/liner contacts. 9TH WORLD CONGRESS ON COMPUTATIONAL MECHANICS AND 4TH ASIAN PACIFIC CONGRESS ON COMPUTATIONAL MECHANICS, v. 174, p. 10-pg., 2017-01-01. (11/24147-5, 14/19249-1)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

SILVA, Hugo Marcial Checo. Models and methods for the direct simulation of rough and micropatterned surfaces. 2016. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Ciências Matemáticas e de Computação (ICMC/SB) São Carlos.