logo-polimi
Loading...
Risorse bibliografiche
Risorsa bibliografica obbligatoria
Risorsa bibliografica facoltativa
Scheda Riassuntiva
Anno Accademico 2019/2020
Scuola Scuola di Ingegneria Industriale e dell'Informazione
Insegnamento 051198 - MECHANICAL TESTING AT SMALL SCALE
Docente Ghisi Aldo Francesco
Cfu 5.00 Tipo insegnamento Monodisciplinare

Corso di Studi Codice Piano di Studio preventivamente approvato Da (compreso) A (escluso) Insegnamento
Ing Ind - Inf (Mag.)(ord. 270) - MI (491) MATERIALS ENGINEERING AND NANOTECHNOLOGY - INGEGNERIA DEI MATERIALI E DELLE NANOTECNOLOGIE*AZZZZ051198 - MECHANICAL TESTING AT SMALL SCALE

Obiettivi dell'insegnamento

The course aims at providing students an overview of the knowledge to the design of experiments focused on the mechanical characterization at small scale (10-3 - 10-6 m) for materials and micro-devices.

In the first part of the course, the practical and theoretical concepts useful for the implementation of experiments aimed at the study of mechanics at small scale will be provided throughout examples of instrumentation and experiments adopted at the laboratory LABMEMS&3D. 

The second part of the course will focus on practical activities (design of experiment and experimental setup) aimed at providing students the possibility to apply the course topics by means “learning by doing” and “team working”.


Risultati di apprendimento attesi

Lectures and exercise sessions will allow students to:

  • Analyze and understand the goals, assumptions and requirements associated to an experimental apparatus for mechanical and electromechanical measurements
  • Identify and define software solutions for the control of experimental equipment
  • Identify and define software solutions for results acquisition and elaboration

 The project laboratory will allow students to:

  • Apply basic concepts of mechanics of solids and structurers to the design of experimental equipment
  • Make experience on the use of CAD software for the design of simple mechanical elements
  • Write a requirement specification document
  • Write a design specification document
  • Analyze software code written by others
  • Summarize and present the results achieved during the analysis and specification activities

Argomenti trattati

The topics of the lectures are divided in two submodules:

- Experiments for materials and interfaces

- Experiments for micro-devices

Lectures

  • Experimental methods to assess and measure interface strength:

- Shear test to characterize bonding layers between silicon wafers.

- Wire tensile test.

  • Practical topics for design:

- Experimental setup with parts eventually dedicated to “in-situ” observation: actuators, force and displacements sensors, mechanical part dedicated to manipulate and to grip samples, digital imaging, electronics for data acquisition and control software.

- Examples of design of experimental setup will be proposed by means of CAD software assembly.

- Examples of software codes dedicated to data acquisition and control of instruments will be illustrated (Labview and Matlab code examples).

  • Brief review of electrostatics and mechanics fundamentals applied to microsystems.
  • Brief review of commonly used microsystems of large diffusion, with emphasis on mechanical measurements in statics and dynamics (e.g. accelerometers, gyroscopes).
  • “On-chip” and “off-chip” measurements: capacitive sensing and actuation for laboratory testing in statics and dynamics
  • Tests of shear mechanical strength at bonded interfaces.
  • Open issues in mechanical measurements at the small scale: limits of the homogeneous continuum approach, scale effects, nonlinearities induced by the electro-mechanical coupling.

Practical part:

Presentation of the facilities at the Laboratory of Micromechanics and Field Measurements.

 The project activity developed by the students will be focused on a specific experiment definition with the theoretical topics for results interpretation and the design of the experimental apparatus.

Topics of the projects:

- mechanical behavior of materials and/or interfaces;

- standard techniques for MEMS measurements with existing machines at the Politecnico (e.g. capacitive measurements in statics and dynamics);

- design of new on-chip MEMS testing structures (e.g. microsystems for the evaluation of residual stresses).


Prerequisiti

Students are required to know the principles and methods of mechanics of solids and structures and electrostatics.


Modalità di valutazione

Oral discussion about the group project developed during the laboratory part of the course.


Bibliografia

Software utilizzato
Nessun software richiesto

Forme didattiche
Tipo Forma Didattica Ore di attività svolte in aula
(hh:mm)
Ore di studio autonome
(hh:mm)
Lezione
20:00
30:00
Esercitazione
0:00
0:00
Laboratorio Informatico
0:00
0:00
Laboratorio Sperimentale
10:00
15:00
Laboratorio Di Progetto
20:00
30:00
Totale 50:00 75:00

Informazioni in lingua inglese a supporto dell'internazionalizzazione
Insegnamento erogato in lingua Inglese
Disponibilità di materiale didattico/slides in lingua inglese
Possibilità di sostenere l'esame in lingua inglese
Disponibilità di supporto didattico in lingua inglese
schedaincarico v. 1.8.3 / 1.8.3
Area Servizi ICT
21/02/2024