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

There will be 11 exercises to be handed in (hand or computer written) on blackboard. Admission to the written examination requires approval of at least 8 of exercises.

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

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 2024

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 2024-05-21 09:00 PAPIR
Room Building Number of candidates
Storhall del 2 Idrettssenteret (Dragvoll) 74
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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