TMM4112 - Machine Elements


Examination arrangement

Examination arrangement: Home examination
Grade: Letters

Evaluation form Weighting Duration Examination aids Grade deviation
Home examination 100/100 4 hours A

Course content

Basic functions of machines and machine elements. Mechanical integrity.
1. Fatigue design: including Wöhler curve and Smith diagrams, Fatigue limit, Reduction factors, Stress concentrations, Multi-axial stresses, Spectrum fatigue lifetime.
2. Machine and rotor dynamics: Spring supported machines, critical speed/rpm, static and dynamic balancing.
3. Mechanisms and transmissions: Mechanics of the screw, gears.
4. Couplings and brakes: Disc break (evenly distributed pressure and wear), drum brake (internal and external), fixed and releaseable couplings
5. Bearings: roller bearings, bearing design, life time assessment.
6. Springs: torsion, coil, leaf, ring and rubber springs.
7. Press and shrink-fit connections: deformation of thick-walled tubes, tolerances and fits.
8. Bolts: threads, load carrying capacity, pretension, tightening/torque moment, bolt diagram.
9. Welded joints: static and fatigue analyses.

Learning outcome

The student has knowledge of:
- Machine elements and their design, functional principles, mechanisms, and integration in machinery.
- The functions of some common machine elements and the solution of design and engineering problems associated with these.
- How to establish structural and dynamics models for mechanical behavior with basis in subsystem or component.
- The application of design criteria for different (mechanical) functional and design requirements for various machine elements and components.
- Choice of reasonable design and engineering solutions with basis in basic understanding of mechanical behavior and design criteria.

Technical skills:
The student shall master the following:
- Apply knowledge from basic courses such as mathematics, physics, mechanics, statics, (strength of) materials to evaluate, design and engineer real components/machine elements.
- Simplify basic machine systems into representative models for mechanical analysis.
- Perform simple predictions, providing a basis for more effective and right evaluation of critical factors and issues associated with (design) robustness of machine components.
- Provide the necessary competence to carefully evaluate results obtained by more advanced numerical analysis methods such as FEM.

General competence:
The student shall on general basis understand:
- Main steps and considerations included in a design process for machine elements.
- Understand on general basis reasonable, sound design principles for selected machine components.
- General design and engineering principles for machine elements subjected to static and dynamic loads.
- On an independent basis capture knowledge of more complex machine elements and design and engineering principles.

Learning methods and activities

Lectures, demonstrations, exercises.

Compulsory assignments

  • Exercises

Further on evaluation

Admission to the written examination requires approval of 3/4 of exercises.

If there is a re-sit examination, the examination form may be changed from written to oral.

For a re-take of an examination, all assessments during the course must be re-taken.

Specific conditions

Exam registration requires that class registration is approved in the same semester. Compulsory activities from previous semester may be approved by the department.

Course materials

G. Härkegård: Dimensjonering av maskindeler, Tapir Akademisk Forlag, Trondheim, 2004.

Support Literature:
J.A. Collins, H.R. Rusby, G.H. Staab: Mechanical Design of Machine Elements and Machines: A Failure Prevention Perspective, Wiley 2010

More on the course



Version: 1
Credits:  7.5 SP
Study level: Third-year courses, level III


Term no.: 1
Teaching semester:  SPRING 2021

No.of lecture hours: 3
Lab hours: 2
No.of specialization hours: 7

Language of instruction: Norwegian

Location: Trondheim

Subject area(s)
  • Technological subjects
Contact information

Department with academic responsibility
Department of Mechanical and Industrial Engineering



Examination arrangement: Home examination

Term Status code Evaluation form Weighting Examination aids Date Time Digital exam Room *
Summer UTS Home examination 100/100 A INSPERA
Room Building Number of candidates
Spring ORD Home examination (1) 100/100 A

Release 2021-05-25

Submission 2021-05-25

Release 09:00

Submission 13:00

Room Building Number of candidates
  • * The location (room) for a written examination is published 3 days before examination date. If more than one room is listed, you will find your room at Studentweb.
  • 1) Merk at eksamensform er endret som et smittevernstiltak i den pågående koronasituasjonen. Please note that the exam form has changed as a preventive measure in the ongoing corona situation.

For more information regarding registration for examination and examination procedures, see "Innsida - Exams"

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