Faculdade de Ciências e Tecnologia

Mechanical Behaviour of Materials

Code

3660

Academic unit

Faculdade de Ciências e Tecnologia

Department

Departamento de Engenharia Mecânica e Industrial

Credits

6.0

Teacher in charge

Jorge Joaquim Pamies Teixeira, Rosa Maria Mendes Miranda

Weekly hours

4

Total hours

84

Teaching language

Português

Objectives

 

The subject aims at providing students with knowledge on:

- mechanical properties of major groups of materials in engineering
- phenomenological aspects of plasticity
- mechanical tests
- concepts and applications of fracture mechanics,  fatigue and creep
- criteria for design
- concepts of stress corrosion.

 

Prerequisites

Students are requested to have completed Materials Science and Solid Mechanics I.

Subject matter

 

Theory and concepts of plasticity. Mechanical testing.
Fracture mechanics: microstrutural characteristics of fracture. Stress intensity factor. J Integral . Stress distribution at crack tip. Experimental methods of evaluation of fracture toughness. Nucleation and crack propagation in ductil materials.
Fatigue: microstrutural characteristics. Fatigue limit. Types of fatigue and characteristics. laws applicable in each domain. Design of components under fatigue conditions.Neuber rule. Iniciation and propagation of styress corrosion cracks under corrosion environment. Fatigue in welded structures
Creep and stress relief.
Stress corrosion. Fundamentals.
Case studies in service conditions

 

Bibliography

 

Jorge Rodrigues e Paulo Martins, Tecnologia Mecânica - vol.1, ed. Escolar Editora, 2005
Martins Ferreira, Comportamento mecânico de materiais, ed. FCTUC, 1999
Ashby, Michael F., Jones, David R.H., “Engineering Materials 1: An introduction to their properties and applications”, 2nd Edition, Butterworth Heinemann, 1996

Teaching method

In lectures the material is presented and discussion is promoted.

In the tutorials there are some lab work to promote the contact of the student with a variety of experimental equipment.

The students are additionally supported by online platform.

Evaluation method

Continuous evaluation with 3 intermediate tests or final written exam.

Minimum mark of each test : none

Minimum mark for final approval : 10/20

Courses