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TMHL17/Material Mechanics - laboratory and computation techniques, 12 ECTS credits
/Materialmekanik - provnings- och beräkningsteknik, 12hp/

For: M

Course language:
English

Detailed information for ongoing course
Course programme document

Prerequisites:
Multi-variable calculus, Solid Mechanics including plate- and shell theory and FEM

Aim
To give the students a deep understanding of the properties and behaviours of different materials and of how these can be translated into computational models for the analysis of deformation and mechanical integrity aspects of actual components. The intention is to provide the students with a good base of knowledge as a preparation for advanced development work within national and international mechanical industry. Examples of applications are turbine technology, vehicle technology and aircraft design. After the course the students will be able to

  • account for fundamental aspects of the mechanical properties of materials used, and for how these properties can typically change due to environmental influence, for instance temperature and chemical environment,
  • account for how the composition and structure of the materials typically influence the mechanical properties,
  • perform practical material analyses and microstructure analyses in optical and scanning electron microscope,
  • carry this knowledge over in a judicious way to material models, used in mechanical integrity and deformation analyses,
  • use the material models in component design,
  • carry out mechanical integrity analyses, using different advanced material models, and to evaluate computed results with respect to life and overall integrity aspects
Course content
‘Material part’: Material phenomena coupled to anisotropy and inelastic deformation, modern material analysis methods used for characterizing these phenomena.

‘Modelling and computation part’: Continuum-mechanical basis, plastic deformation, viscoplasticity/creep, FE modelling of nonlinear material behavior.

Course organisation
Lectures, teaching classes, laboratory and FE computation work. Details are found in the course programme document, which will be continuously updated during the course. 

Literature
Stouffer D.C, Dame L.T., Inelastic Deformation of Metals - Models, Mechanical Properties and Metallurgy, Wiley, 1996
Gudmundson P: Material mechanics, department of Solid Mechanics, KTH Engineering Sciences, STOCKHOLM, Sweden, 2006
Gudmundson P: Material Mechanics, exercises with solutions, department of Solid Mechanics, KTH Engineering Sciences, STOCKHOLM, Sweden, 2006

Supporting documents
Equations and theorems summary
Mini manual of tensor shorthand

Lecture notes and reading list
Lecture notes will be available (with some delay) here:
Continuum-mechanical background
Classes of constitutive laws
Elastic anisotropy

Plasticity: Yield criteria

Plasticity: Flow rule, general
Plasticity: Flow rule, perfect plasticity
Plasticity: Flow rule, stable hardening material

Plasticity: Flow rule, isotropic hardening
Plasticity: Flow rule, kinematic hardening
Plasticity: Computational aspects and continuum tangent stiffness matrix

Plasticity: Algorithmic tangent matrix

Plasticity: Return mapping

Damage mechanics

Electron probe microanalysis (EPMA)
SEM lecture and Diverse SEM pictures
WDS principles

The reading list will be updated continuously. At present, it only contains a reading list for Gudmundson P: Material mechanics

Additional written texts
Lecture notes, extra example problems, ... can be added here during the course. Check this website to keep updated!
Example problems viscoplasticity; solution_01, solution 02
Laboratory profile and modelling/computation profile

There will be 6 laboratory work assignments, namely:

  • L01: Mechanical testing: Tensile testing, LCF
  • L02: Mechanical testing: Bending testing, notched LCF
  • L03: Test prparation, light microscopy
  • L04: X-ray diffraction, residual stress measurement
  • L05: Scanning electron microscopy (SEM)
  • L06: Electron backscatter diffraction (EBSD)
and 5 FE computation assignments, namely:
  • C01: Elastic anisotropy
  • C02: Plasticity: 4-point bending specimen
  • C03: Plasticity: LCF specimen
  • C04: Viscoplasticity/creep
  • C05: Fracture mechanics, fatigue

Mandatory package: L01, L02, L04, C02, C03 and C05
In addition to the mandatory package, you must choose either of the two profile packages LP or CP:
LP: Laboratory profile: L03, L05 and L06
CP: Modelling/computation profile: C01 and C04

Some information to guide you in this choice: laboratory profile and modelling/computation profile.
Note that changes have been made in the modelling/computation profile description 2011-09-26!

Instructions for laboratory work and FE exercises

Time schedules for the second period of the autumn semester (2011-10-24 - 2011-12-09)
Instructions for the report writing

Lab Assignment L01
Lab Assignment L02
Lab Assignment L03. As a preparation for this, please read http://www.struers.com/resources/elements/12/2474/35art2.pdf
Lab Assignment L04
Lab Assignment L05
Lab Assignment L06
FE Assignment C01.
FE Assignment C02
FE Assignment C03
FE Assignment C04
.inp file for FE Assignment C04
FE Assignment C05


Examination

The examination will be by
  • a written examination paper, and
  • reports of the laboratory and FE computation work assigments according to the specification in the course programme document

The examination paper will be a combined questions and problem solutions paper.
Examination paper outline: Material/laboratory part 50 points (questions)
                                        Modelling/computation part 50 points (problem solution 40, questions 10 points)
Pass (Swedish grade 3, ECTS C): at least 20 points from each of the material and modelling parts
Swedish grade 4 (ECTS B): 60 points total
Swedish grade 5 (ECTS A): 80 points total
Link to a fictitious examination paper (modelling/computation part) with solutions

Contacts
Sören Sjöström tel. 013 28 11 18, 070 635 75 66
Johan Moverare tel. 013 28 11 41, 073 460 75 13


Page responsible: Bo Torstenfelt
Last updated: 2012-04-05