Course code: MM207E01

Semester: 7th - Direction: Design & Manufacturing

Specialization Category: OCD2

Course Hours: 4

ECTS: 4

i. Learning outcomes

Upon successful completion of this course, the student will be able to:

• Recognize the parts of engineering assemblies that are subjected to surface mechanical loading, in order to calculate and re-design them for optimizing the performance of the integrated mechanical system.
• Select the suitable surface modification technique per bearing type, in order to assure its safe and long operation.
• Use knowledge from the field of fluid mechanics in order to reliably solve problems of lubrication.
• Make good use of knowledge from the fields of mathematics, statistics and numerical analysis, in order to develop algorithms for the prediction of safe operation of tribo-systems.

ii. General competences

Upon completion of the course, the students would develop, also, general competences, concerning:

• Search, extraction, analysis and synthesis of scientific data and knowledge, using screening of large scientific databases. - Decision making capabilities on the suitable lubricant and surface modification technique selection for a given engineering application. - Understanding the requirements for generic approaches in a worldwide environment. - Project planning and management. - Capability of performing individual- and team-working case studies. - Ability to conceive the multi-disciplinary character of various engineering applications.
• Project planning and management. - Capability of performing individual- and team-working case studies. - Ability to conceive the multi-disciplinary character of various engineering applications.

iii. Syllabus

The knowledge offered in the course concerns: • Clarification of basic concepts, like the tribo-system’s definition, its main operating parameters and the critical materials’ volumetric and surface properties affecting its operation. • Surface micro-geometry (roughness) analysis and measurement. • Assessment of the mechanical loading effects on surface and sub-surface layers of conjugated, non-moving bodies (Elasto-static theory). Movement deceleration mechanisms of bodies in contact (Friction) that increase energy requirements. • Surface degradation mechanisms during relative motion of conjugate bodies (Wear) that cause mass losses. • Special topics on the action of solid, liquid and hybrid lubricants targeted to facilitate motion, without crucial dimensional change of bodies, leading to minimization of energy and mass loss. • Special topics on technological applications of bearing journals and their calculation.
• Surface modification techniques for enhancing the surface properties of tribo-elements.

iv. Student performance evaluation

Theory: Intermediate assessment and written final examination. Laboratory: evaluation of practical skills and multiple-choice exams.

v. Suggested bibliography

• Psyllaki P., Nikolakopoulos P. (2020). Surface engineering and applications. Tziolas publications.
• Williams, J. (2005). Engineering Tribology. Cambridge University Press.
• Zum Gahr, K.-H. (1987). Microstructure and Wear of Materials. Elsevier Ltd.
• Holmberg, K. and Matthews A. (1998). Coatings Tribology. Elsevier Ltd.
• Basu,B. and Kalin, M. (2011). Tribology of Ceramics and Composites. John Wiley & Sons Inc