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Scheda Riassuntiva
Anno Accademico 2018/2019
Scuola Scuola di Ingegneria Industriale e dell'Informazione
Insegnamento 097537 - MECHANICAL DESIGN FOR HIGH TEMPERATURE ENGINEERING APPLICATIONS
Docente Filippini Mauro
Cfu 6.00 Tipo insegnamento Monodisciplinare

Corso di Studi Codice Piano di Studio preventivamente approvato Da (compreso) A (escluso) Insegnamento
Ing Ind - Inf (Mag.)(ord. 270) - BV (483) MECHANICAL ENGINEERING - INGEGNERIA MECCANICA*AZZZZ097537 - MECHANICAL DESIGN FOR HIGH TEMPERATURE ENGINEERING APPLICATIONS

Obiettivi dell'insegnamento

The scope of this course is the development and the enhancement of the knowledge in the field of the design of structural components and parts employed in high temperature applications (e.g. in gas and steam turbines, internal combustion engines, steam and gas power plants and more in general for parts and machines working under high temperature service conditions), taking into account the specific mechanical properties of materials at high temperature. Moreover, the course aims at covering specific problems of structural integrity and durability of components and mechanical systems used in the power generation industry and in propulsion gas turbine engines.


Risultati di apprendimento attesi

Lectures will provide the basis of mechanical design methods (Knowledge and understanding) and related application skills in the field of structural design of mechanical components operating under high temperature service conditions.

Once the student has passed the exam, the student will:

  • know the relevant loading and operating conditions of different mechanical components employed in turbomachinery, IC engines and power plants (Knowledge and understanding);
  • know structural damage modes (Knowledge and understanding);
  • be able to identify the loading and operating conditions of mechanical components employed in turbomachinery, IC engines and power plants (Applying knowledge and understanding);
  • be able to identify the relevant structural damage modes (Knowledge and understanding) and to apply suitable structural design methods to assess the useful operative life and to evaluate the structural integrity of mechanical components operating at high temperature (Applying Knowledge and understanding).

Classwork in computer room will develop the student problem solving abilities in new environments (Applying Knowledge and understanding). Some mechanical design problems (in the context of high temperature service conditions, e.g. turbine blades, power boiler header, etc.) will be proposed and the students will be required to solve them under a light guidance of the instructor. The students will tackle the proposed mechanical design problems in a manner that will be largely self-directed (Making Judgements and Learning skills). Eventually, the students will present a report for each of the proposed problems (short-projects) containing: Context description, Project goals and choice of design methods, result analysis, Conclusions and recommendations (Communication).


Argomenti trattati

General subjects

Principles of mechanical design: Engineering design of mechanical components. Components and systems used in the power generation industry: design requirements. Structural mechanical design, general requirements.

Methods for the selection of materials in mechanical design: Structural materials for the design of components and systems operating at high temperatures, Ashby’s method for the selection of materials, with particular emphasis on temperature dependent properties.

Durability and structural integrity assessment: complements on life and durability assessment of mechanical components and products; complements on high-cycle fatigue (HCF) and low-cycle fatigue (LCF) with special emphasis on high temperature effects, complements on fracture mechanics, creep of engineering materials, creep-fatigue interaction and creep-fatigue life assessment methods, elements of thermo-mechanical fatigue, environmental effects (oxidation, etc.), with special emphasis on high temperature effects. Life and durability assessment and transferability of experimental results to the design of mechanical components.

Mechanical properties of materials for high temperature applications

High temperature metallic alloys: monotonic and cyclic properties; typical applications; short description of production technologies, with special emphasis on their effect on mechanical properties (e.g., superalloys for gas turbine blades);

Engineering polymers and composite materials for high temperature applications: temperature dependence on the mechanical properties; typical applications; characteristic temperatures; specific design methods (brief mention);

Ceramic coatings: typical mechanical properties; use; main failure modes; specific design methods.

Mechanical design

Components for high temperature applications: calculation of stress and strains under monotonic and cyclic loading (in particular, thermal stresses), effect of notches under elasto-plastic conditions, creep-fatigue interaction, durability assessment of typical components employed in the power generation industry (turbine blades, rotor discs, etc.).

Applications

Case studies: Simplified case studies of components employed in turbomachinery and internal combustion engines. Service strength, mechanical design.

Tutored design lab: Thermal stresses, creep and fatigue life calculation under service conditions of turbomachinery components.

Experimental lab: Experiments for the derivation of mechanical properties of materials for high temperature applications (to be activated depending on the attendance).

Small groups teamwork (2-3 students) is allowed. Students should be able to complete the short-projects within the allocated time for tutored computer lab (class time).


Prerequisiti

Students attending this course are required basic knowledge about Strength of materials and Machine design.


Modalità di valutazione

The final exam consists in a short written test (to be completed in about 1 hour), with at least one question requiring numerical/analytical answers and one open question about the general topics of the course (Knowledge and understanding and Applying Knowledge and understanding) immediately followed by oral questions on the topics covered by the course (Knowledge and understanding and Communication) and questions aimed at highlighting the skills of the student in applying the concepts acquired in this course integrating them with knowledge deriving from previous courses in the context of mechanical design of components operating at high temperature (Applying Knowledge and understanding, Making judgements and Communication). Eventually, discussion about the report on the short-projects (tutored computer lab) and its assessment will demonstrate the Communication and Learning skills of the student.


Bibliografia
Risorsa bibliografica obbligatoriaOverhead slides covering the main topics of the course https://beep.metid.polimi.it
Risorsa bibliografica facoltativaChapters or sections of teaching material covering in more detail some specific topic of the course will be provided through the Beep platform. https://beep.metid.polimi.it

Forme didattiche
Tipo Forma Didattica Ore di attività svolte in aula
(hh:mm)
Ore di studio autonome
(hh:mm)
Lezione
36:00
54:00
Esercitazione
3:00
4:30
Laboratorio Informatico
21:00
31:30
Laboratorio Sperimentale
0:00
0:00
Laboratorio Di Progetto
0:00
0:00
Totale 60:00 90:00

Informazioni in lingua inglese a supporto dell'internazionalizzazione
Insegnamento erogato in lingua Inglese
Disponibilità di materiale didattico/slides in lingua inglese
Disponibilità di libri di testo/bibliografia in lingua inglese
Possibilità di sostenere l'esame in lingua inglese
Disponibilità di supporto didattico in lingua inglese
schedaincarico v. 1.6.1 / 1.6.1
Area Servizi ICT
02/04/2020