TMM4112 - Machine Elements


Examination arrangement

Examination arrangement: School exam
Grade: Letter grades

Evaluation Weighting Duration Grade deviation Examination aids
School exam 100/100 4 hours C

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

Knowledge: 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

To pass the course, the written home examination has to be passed (at least E). If you fail on the exam, you have to take the course again.There will be 11 excercises to be handed in (hand or computer written) on blackboard. Admission to the written examination requires approval of 8 of exercises.

Excercises of previous years will not be approved for this year. You have to deliver the excercises again.

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.

Required previous knowledge

Students are expected to have a basic understanding of mechanics of materials, failure criteria, statics and machine dynamics.

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 2023

Language of instruction: Norwegian

Location: Trondheim

Subject area(s)
  • Technological subjects


Examination arrangement: School exam

Term Status code Evaluation Weighting Examination aids Date Time Examination system Room *
Spring ORD School exam 100/100 C 2023-05-24 09:00 PAPIR
Room Building Number of candidates
Storhall del 2 Idrettssenteret (Dragvoll) 72
DI171 Idrettssenteret (Dragvoll) 4
Summer UTS School exam 100/100 C PAPIR
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.

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

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