TMM4112 - Machine Elements


Examination arrangement

Examination arrangement: Written examination
Grade: Letters

Evaluation form Weighting Duration Examination aids Grade deviation
Written examination 100/100 4 hours C

Course content

Basic functions of machines and machine elements. Mechanical integrity. Fatigue design: including Wöhler curve and Haigh diagrams, Reduction factors, Stress concentrations, Multi-axial stresses, Spectrum fatigue lifetime. Machine and rotor dynamics: Spring supported machines, critical speed/rpm, static and dynamic balancing. Mechanisms and transmissions: Mechanics of the screw, gears. Couplings and brakes. Bearings: roller bearings, bearing design, life time assessment. Springs: torsion, coil, leaf, ring and rubber springs. Press and shrink-fit connections: deformation of thick-walled tubes, tolerances and fits. Bolts: threads, load carrying capacity, pretension, tightening/torque moment, bolt diagram. Welded joints: static and fatigue analyses.

Learning outcome

The course gives 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 have knowledge of:
- Main steps and considerations included in an engineering 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.

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. English support literature will be stated at the beginning of term.


Detailed timetable


Examination arrangement: Written examination

Term Statuskode Evaluation form Weighting Examination aids Date Time Room *
Spring ORD Written examination 100/100 C
  • * 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.