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The coursework will be marked based on a report of the analysis.
This report should include :
Introduction : (1 page, 10 marks)
Should outline basic strategy toward part optimisation. How do you plan to go from existing part to new design capable of accommodating new motor.
Design evolution : (up to 3 pages, 20 marks)
Show how part evolves to finished design. Include stress plots together with brief reason for each iteration)
FE Anlaysis : (up to 5 pages, 40 marks)
§
A discussion of the planning of the design – eg. element type to be used, number and size of elements, use of symmetry, restraints etc.
§ A discussion of the design evolution and optimisation. How was optimisation achieved ?
§ How was the mesh created ? Were any bad elements generated ? If so what was done to try to eliminate these ? Include a printout of the mesh.
§ How were boundary conditions and loads / displacements applied ?
§ Results : Show von mises stress plot of intermediate and final designs.
Manual verification : (up to 2 pages, 20 marks)
Show analysis is credible by doing some manual validation of stress and deflection.
Were the results generally of a magnitude which might be expected ? Explain.
Conclusion : (up to 1 page, 10 marks)
Wrap up exercise – reflect on experience
FULL COUREWORK QUESTION IS ATTACHED
ME3070 : Coursework 2
40mm
C mm
E mm
D mm
A mm
B mm
50
N at
45
◦
50 N
Large chassis mounting holes : 10mm diameter
Small motor mounting holes : 6mm diameter
Plate is made from 2mm thick steel, E = 220 GPa, Poissons ratio 0.27, and yield stress of 200 MPa, but work to a maximum von Mises stress of 80 GPa.
The figure above shows a bracket used to mount a windscreen wiper motor assembly in a small family car. A move to a different motor supplier means the existing bracket is no longer suitable as the new motor is to a slightly different design and would interfere with the existing plate. This is shown by the dashed white circle (diameter 50mm) which must now be clear of material.
The car company are also keen to take the opportunity to shave weight from the component.
You are to use ANSYS to redesign the component to meet the requirements and reduce weight.
· The material type and thickness must remain as is, as must the location and size of the chassis and motor mounting holes.
· The chassis mounting holes must be fixed with loading to the motor mount holes as shown.
· The provision for the new motor can either be a hole or cut-out in the plate.
· The motor mounting holes must not deflect more than 0.25 mm under loading.
· The plate must be at least 3mm broad at all points to ensure successful laser cutting.
Submission
The coursework will be marked based on a report of the analysis.
This report should include :
Introduction : (1 page, 10 marks)
Should outline basic strategy toward part optimisation. How do you plan to go from existing part to new design capable of accommodating new motor.
Design evolution : (up to 3 pages, 20 marks)
Show how part evolves to finished design. Include stress plots together with brief reason for each iteration)
FE Anlaysis : (up to 5 pages, 40 marks)
· A discussion of the planning of the design – eg. element type to be used, number and size of elements, use of symmetry, restraints etc.
· A discussion of the design evolution and optimisation. How was optimisation achieved ?
· How was the mesh created ? Were any bad elements generated ? If so what was done to try to eliminate these ? Include a printout of the mesh.
· How were boundary conditions and loads / displacements applied ?
· Results : Show von mises stress plot of intermediate and final designs.
Manual verification : (up to 2 pages, 20 marks)
Show analysis is credible by doing some manual validation of stress and deflection. Were the results generally of a magnitude which might be expected ? Explain.
Conclusion : (up to 1 page, 10 marks)
Wrap up exercise – reflect on experience
ME3070 Coursework Table
|
Surname |
Forename |
A (mm) |
B (mm) |
C (mm) |
D (mm) |
E (mm) |
|
Almazidi |
Salman |
87 |
97 |
72 |
45 | 50 |
