Publication in the Diário da República: Despacho nº 14312/2015 - 02/12/2015
5.5 ECTS; 3º Ano, 1º Semestre, 30,0 T + 30,0 TP + 4,50 OT , Cód. 912361.
Lecturer
- Jorge Manuel Afonso Antunes (1)(2)
(1) Docente Responsável
(2) Docente que lecciona
Prerequisites
A pass in previous modules: Physical; Applied Mechanics; Mechanics of Materials
Objectives
The students should learn the basic concepts:
of failures resulting from static and variable loading; of lubrification and wear. And be able to design of mechanical elements as welding, brazing, bonding, screws, fasteners, mechanical springs shafts and axles.
Program
1. Fatigue project
1.1. Characterization of the fatigue process
1.2. Fatigue stress cycles and its fundamental parameters
1.3. Characterization of fatigue strength curves
1.4. Behavior parameters to fatigue
1.5. General methods of design and design fatigue
1.6. Fatigue analysis range of variable load
1.7. Cracking fatigue life
2. shafts
3. Keys
4. Screws
4.1. Types of threads
4.2. Types of screws
4.3. Requests and design
4.4. Screws with preload
4.5. Calculation of subjects screws eccentric loads
5. Springs
5.1. Torsion bars
5.2. Stresses and deformations in helical springs tension and compression
5.3. Materials for springs
5.4. Types of coils
5.5. Sizing fatigue of coil springs
5.6. Leaf springs
6. Lubrication and Wear:
6.1. Wear of Materials
6.2. Types of Lubricating
6.3. Viscosity
6.4. Lubricants
Evaluation Methodology
Students are assessed through written exams in one of the three instituion evaluation periods. The written test will have a minimum of 9.5 for approval.
Bibliography
- Antunes, J. (2022). Órgãos máquinas I. Portugal: Apontamentos do docente
- Branco, C. e Ferreira, J. e Costa, J. e Ribeiro, A. e , . (2005). Projecto de Órgãos de Máquinas. Portugal: Fundação Calouste Gulbenkian
- Budynas, R. e Nisbett, K. (2014). Shigley's Mechanical Engineering Design . (Vol. 1). (pp. 1-1248). EUA: McGraw-Hill
Teaching Method
Presentation of key theoretical concepts. Theoretical/practical classes including case study discussions.
Software used in class
PowerPoint.
