Multiscale Contact Mechanics and Tribology

Uitgebreide vaknaam	Multiscale Contact Mechanics and Tribology
Leerdoelen	At the end of the course, the student is able to: 1.Assess the importance of modelling friction beyond the use of empirical coefficients; 2.Identify the main regimes of lubrication and their influence on contact, friction and wear; 3.Assess the role of surface topography (roughness) and scale on adhesion and, hence, contact and friction in the micro- and nanoscale; 4.Assign the appropriate theory and model(s) to the study of applications where the relative motion of components is of vital importance; 5.Demonstrate the basic modelling skills necessary to perform the above tasks.
Omschrijving	Tribology is the study of interfaces in relative motion. The need to control friction is not new; however, its systematic study is relatively recent while its precise nature is still not fully understood. This course aims to introduce students to tribology – the study of contact, friction, lubrication and wear – starting from the traditional definitions and transitioning to recent theories and models used to understand the fundamentals of tribology and enable the design, analysis and optimization of devices over multiple scales. Part of the course will deal with classical (macroscale) definitions and models of contact, friction and lubrication including, but not limited to: › Hertzian contact and Coulomb friction; › Hydrodynamic and elastohydrodynamic lubrication; and, › Wear. Example applications will be utilized to demonstrate these themes with analytical solutions as well as representative experimental and simulation results. Subsequently transitioning to smaller scales, the course will look at the role of surface topography in contact and friction and investigate the importance of adhesion as a function of scale and roughness. Theories (and models) to be discussed are, for example: › Short and long range atomic interactions; › Roughness characterization (statistical, numerical, fractal); › Sphere-on-flat models with adhesion (JKR, DMT, M-D); › Rough surface models (Greenwood-Williamson, CEB, SBL, Persson); › Other approaches (finite element-based models, molecular dynamics). Brief descriptions of experimental methods will introduce students to the tools used in micro- and nanotribology, such as profilometry, atomic force microscopy (AFM) and nanoindentation. The course will also cover the coupling of tribology with dynamics and vibrations, especially in the micro- and nanoscale, via reviews of applications such as the head-disk interface of hard disk drives.
Uren per week
Onderwijsvorm	Hoorcollege (LC), Opdracht (ASM), Practisch werk (PRC) (Total hours of lectures: 28 hours, practical: 4 hours, homework assignments: 32 hours, self-study: 76 hours.)
Toetsvorm	Opdracht (AST), Schriftelijk tentamen (WE) (See remarks for final grade.)
Vaksoort	master
Coördinator	prof. dr. A. Vakis
Docent(en)	prof. dr. A. Vakis
Verplichte literatuur	Titel Auteur ISBN Prijs All material, including lecture notes and computer project manuals will be posted on Nestor. Additional material includes scientific journal articles. All material, including lecture notes and computer project manuals will be posted on Nestor.
Entreevoorwaarden	The course unit assumes prior knowledge acquired from fundamental courses such as “Materials Science and Engineering” and “Mechanics for TBK”, which are mandatory in the Production Technology and Logistics (PTL) track of Industrial Engineering and Management (IEM) Bachelor. However, the course unit content is structured so that all relevant concepts from earlier courses are re-introduced where necessary, starting from the first lecture that constitutes a review of solid mechanics and materials fundamentals.
Opmerkingen	The four homework assignments (HW) constitute 60% of the final grade. These increase in their level of difficulty, as estimated in the required workload of 4, 8, 12 and 8 hours, respectively. Correspondingly, their weights are scaled so that the first homework assignment is worth 10 percentage points, the second 15%, the third 20%, and the fourth 15%. In the calculation of the final grade, homework assignments are graded on a scale from 0 to 10 and are then scaled according to their weights: HW grade = 0.1*HW1 grade + 0.15*HW2 grade + 0.2*HW3 grade + 0.15*HW4 grade. Therefore, a student can potentially receive a maximum of 6 points from the homework assignments alone. The final exam constitutes 40% of the final grade. Therefore, the final grade is calculated as: Final grade = HW grade + 0.4*Exam grade. Students must receive a final grade of at least 5.6 to pass the course with an assigned grade of 6.0. This course was registered last year with course code WMIE14006
Opgenomen in	Opleiding Jaar Periode Type MSc Courses for Exchange Students: Engineering: Biomedical-Industrial-Mechanical - semester I b MSc Industrial Engineering and Management: Production Technology and Logistics  (Optional technical PTL modules) - semester I b Elective APE MSc Mechanical Engineering: Advanced Instrumentation  (Electives ) 1 semester I b keuze MSc Mechanical Engineering: Materials for Mechanical Engineering  (Electives ) 1 semester I b keuze MSc Mechanical Engineering: Smart Factories  (Electives ) 1 semester I b keuze