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Unit of study_

MECH4460: Mechanical Design 3

This unit teaches the student how to recognise where and how their theoretical skills can be applied to the practical situations that they may encounter in this field of design. The unit utilises assumed theoretical knowledge and skills to elucidate the stresses and strains that exit in the different categories of machine parts. It sets out to make the students familiar with the simplifications that are applied to arrive at the analytic expressions commonly used to analyse the individual categories parts. These simplifications usually begin by assuming that only particular types of loads are carried by each category. The resulting analyses provide approximations to the actual stresses and it is possible to have different degrees of simplifications, requiring more or less work, giving better or worse approximations. Should a particular part be used to carry loads that were not allowed for in the traditional method then some more appropriate method must be found or developed. An important aspect is to make the student practiced in a range of modern concepts, techniques and tools, and to be made aware of their strengths and limitations. Options may be provided in the choice of design assignments. Biomedical engineering and vehicle design problems may be provided as options to more general machine design problems.

Code MECH4460
Academic unit Aerospace, Mechanical and Mechatronic
Credit points 6
Prerequisites:
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MECH2400 and MECH3460
Corequisites:
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None
Prohibitions:
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MECH5416
Assumed knowledge:
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(AMME1802 OR ENGG1802) AND AMME2301 AND AMME2500 AND MECH3361

At the completion of this unit, you should be able to:

  • LO1. consider the range and evolution of CAD systems to aid in the selection of systems for particular duties, for today and in the near future
  • LO2. use a modern kinematic and dynamic package that is integral with our solid modeler CAD system to simulate articulated machinery and determine joint loads between the parts
  • LO3. analyse a simple mechanical assembly, using the FEA package included in our CAD package to critically consider if the assembly can function as required and if the parts are of appropriate shapes
  • LO4. design and make a space frame to carry specified loads and meet dimensional and functional requirements, such that it may be compared with competing frames
  • LO5. select a type then design, a brake system for one of a range of applications, such as taxi, crane, metro train or competition car
  • LO6. design a bolted joint to carry shear loads
  • LO7. determine the appropriate parameters for a gear pair, and possibly a whole gear train, according to AGMA design guidelines by using the numeric optimising solver built into Excel, providing the means of arriving at the lightest or cheapest gear sets
  • LO8. apply modern fatigue life predictions in general to component parts
  • LO9. use a numerical solver to arrive at optimal design dimensions and material properties, provided the invention part of the design is completed and only the size and shape of the design has to be settled
  • LO10. calculate the parameters that define a matched pair of spur gears, leading to the selection of multiple gear pairs in gearboxes
  • LO11. apply considerations of geometrical and practical constraints in the design of parts and assemblies.

Unit outlines

Unit outlines will be available 2 weeks before the first day of teaching for 1000-level and 5000-level units, or one week before the first day of teaching for all other units.

There are no unit outlines available online for previous years.