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Mechanical Elements and Systems

Code 7157
Year 2
Semester S1
ECTS Credits 6
Workload T(30H)/TP(30H)
Scientific area Mechanics and Thermodynamics
Entry requirements Knowledge taught in the UC of Machine Elements, in which the static and fatigue calculation to design mechanical components is addressed, as well as mechanical joining elements.
Mode of delivery Face-to-face in classroom
Work placements Not Applicable
Learning outcomes In this course unit is intended that the student acquire knowledge concerning the design of machines, mechanisms and mechanical elements used in industrial applications and services, acquire an attitude of synthesis of knowledge applied to mechanical elements study.
Acquisition of skills in the basic concepts about theory, operation and applications of mechanical components used in industrial applications and services.
Ability to use fundamental knowledge complemented with new approaches and theories to investigate and solve technological problems with current techniques.
Acquisition of skills which provide the ability to select, develop, conceive and design the mechanical elements, mechanisms and machines.
Ability to apply this knowledge, integrating them:
- in solving more routine or exceptional design problems;
- developing solutions (formulating hypotheses and testing them).
Syllabus 1- Flexible power transmission components: Belt transmission design; Roller chain transmission design. 2- Gears for power transmission: Involute properties; Types of gears; Loadings on tooth; Thickness dimensioning; Teeth correction. 3- Breaks: Introduction; Classification; Performance parameters; Dynamic analysis; Energy dissipation during braking. 4- Couplings between shafts: Rigid and articulated couplings; Clutches. 5-Flywheels: Energy variation in a rotating system; Flywheel inertia. 6- Mechanical vibrations: Introduction; Systems having a single degree of freedom: free vibration and forced vibration without damping and with viscous damping; Systems having two and several degrees of freedom.
Main Bibliography 1. Required reading:
Aurélio Reis: “Apontamentos de Órgãos de Máquinas”
Joseph E. Shigley, Charles R. Mischke, Richard G. Budynas: “Mechanical Engineering Design”, Mc Graw-Hill
C. Moura Branco, J. Martins Ferreira, J. Domingues da Costa, A. Silva Ribeiro: “Projecto de Órgãos de Máquinas”, Fundação Calouste Gulbenkian
G. Henriot: “Traité Théorique et Pratique des Engrenages”, Dunod
2. Recomended reading
Robert C. Juvinall, Kurt M. Marshek: “Fundamentals of Machine Component Design”, John Wiley & Sons, Inc.
- “DUBBEL – Handbook of Mechanical Engineering”, Springer-Verlag
Gustav Niemann: “Elementos de Máquinas, Vol. I, II e III”, Edgar Blucher Ltda
Robert L. Norton: “Projeto de Máquinas – Uma abordagem integrada”, Artmed Editora S.A.
Teaching Methodologies and Assessment Criteria The teaching methodology in this UC is composed, on one hand, by the exposition of theoretical contents, approached in the theoretical classes, with support of audiovisual resources that are made available to students through Moodle. On the other hand, in practical theoretical classes, exercises related to theoretical matters are carried out, applied to concrete examples of machine elements dimensioning. The exercises are also available to students through Moodle. In parallel to these activities, students are invited to design a mechanism/device where they should apply the dimensioning calculations addressed in the theoretical and theoretical-practical classes, starting by identifying the requirements based on which Identify the various components and calculate their dimensions.
Thus, students will be evaluated through partial tests and a practical design project where they will develop a mechanism using the theory taught in the classroom.
Language Portuguese. Tutorial support is available in English.
Last updated on: 2020-01-16

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