Materials
| Áreas Científicas |
| Classificação |
Área Científica |
| OFICIAL |
Solid Mechanics |
Ocorrência: 2023/2024 - 1S
Ciclos de Estudo/Cursos
| Sigla |
Nº de Estudantes |
Plano de Estudos |
Anos Curriculares |
Créditos UCN |
Créditos ECTS |
Horas de Contacto |
Horas Totais |
| LTE |
35 |
Plano de Estudos |
1 |
- |
6 |
75 |
162 |
Docência - Responsabilidades
Língua de trabalho
Portuguese
Obs.: Português/inglês
Objetivos
Promoting knowledge of different types of materials used in mechanical engineering: metals, polymers, ceramics and composites and the relationship between their properties, structure, process and service performance. Recognizing the need for design with new materials.
Resultados de aprendizagem e competências
1. Lectures with presentation of concepts and correlation between different types of materials. Typical cases and examples of materials and their application are also discussed. 2. Lab-Practice classes with solving problems. Experimental work in the laboratory is performed in-group, including testing of materials characterization and mechanical testing. Discussion of the reports of the experimental work is included.
Continuous assessment consists of tests and ten laboratory assignments. The assessment can also be made through a final exam.
Modo de trabalho
Presencial
Programa
1. Introduction
Classification of materials. Advanced materials. Modern materials’ needs.
Interatomic bonding. Primary interatomic bonds. Secondary bonding or van der Waals bonding. The structure of crystalline solids. Fundamental concepts. Unit cells. Metallic crystal structures. Density. Polymorphism and allotropy. Noncrystalline solids.
Crystal Systems. Point coordinates. Crystallographic directions. Crystallographic planes. Linear and planar densities. Close-packed crystal structures
Polycrystalline materials. Anisotropy. X-ray diffraction: determination of crystal structures.
Imperfections in solids. Vacancies and self-interstitials. Impurities in solids. Dislocations and strengthening mechanisms. Characteristics of dislocations. Plastic deformation of polycrystalline materials. Bulk or volume defects. Microscopic techniques.
Diffusion. Diffusion mechanisms. Steady-state diffusion. Nonsteady-state diffusion
Phase diagrams. Solubility limit. Phases. Microstructure. Phase equilibria. One-component (or unary) phase diagrams. Binary isomorphous systems. Interpretation of phase diagrams. Binary eutectic systems. Development of microstructure in eutectic alloys. Equilibrium diagrams having intermediate phases or compounds. Eutectic and peritectic reactions. Solid-phase transformations.
2. Metals
Ferrous alloys. The Iron–Iron Carbide (Fe–Fe3C) phase diagram
Development of microstructure in Iron–Carbon alloys. The influence of other alloying elements.
3. Mechanical properties and testing of materials
4. Heat treatment of steels
Microstructures. Annealing. Quenching and tempering. Tempered martensite. Surface treatments. Mechanical behaviour of Iron–Carbon alloys. Influence of heat treatment in mechanical properties
5. Ceramics
Advanced ceramics. Brittle fracture of ceramics. Stress-strain behavior
Mechanisms of plastic deformation. Mechanical properties.
6. Polymers
Thermoplastic and thermosetting polymers. Copolymers.
Polymer crystallinity. Polymer crystals. Defects in polymers. Crystallization. Melting and glass transition temperatures. Factors that influence melting and glass transition temperatures. Mechanical properties
7. Composites
Fiber-reinforced composites. The fiber phase. The matrix phase
Polymer-matrix composites. Hybrid composites. Laminar composites. Sandwich panels. Mechanical properties.
Bibliografia Obrigatória
W.D. CALLISTER, JR., JOHN WILEY AND SONS, INC. 7TH EDITION (2007); MATERIALS SCIENCE AND ENGINEERING: AN INTRODUCTION
W. F. SMITH, MCGRAW-HILL, 3ªEDIÇÃO (1996); PRINCÍPIOS DE CIÊNCIA E ENGENHARIA DOS MATERIAIS
Métodos de ensino e atividades de aprendizagem
Theoretical classes with the presentation of concepts and correlations between different types of materials. Practical-Laboratory classes with problem-solving. Execution of experimental work in a laboratory environment, including material characterization tests and mechanical tests.Tipo de avaliação
Distributed evaluation with final exam
Componentes de Avaliação
| Designation |
Peso (%) |
| Teste |
50,00 |
| Trabalho escrito |
20,00 |
| Trabalho laboratorial |
30,00 |
| Total: |
100,00 |
Componentes de Ocupação
| Designation |
Tempo (Horas) |
| Frequência das aulas |
45,00 |
| Trabalho laboratorial |
30,00 |
| Estudo autónomo |
37,00 |
| Trabalho de investigação |
30,00 |
| Trabalho escrito |
20,00 |
| Total: |
162,00 |
Obtenção de frequência
Final grade = 30% 1st test grade+ 20% 2nd test grade+ 20% apresentation grade+ 30% Laboratory Grade
If students do not pass the TP component (tests + apresentation), the final grade will be that of the TP component
Fórmula de cálculo da classificação final
Final grade = TP grade(40% Test + 30% written work)+ 30% Laboratory Grade