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machine element project design

1) Solve statics problem to determine applied loads on all components based on requirements

– bearings, driveshaft, gears, …

2) Try using a pillow block by for the bearing supports. The pillow block couples out driveshaft

bending into equal and opposite transverse shears, so the rolling element bearings do not see

any moment loads. Or you could also size several journal bearing supports to see the difference

in complexity and weight.

3) Determine loading diagrams – shears, moments, torsion, axial loads versus location along

driveshaft and at bearing & gear locations.

4) Use appropriate stress theory to translate applied loads into a stress state at critical locations

5) Use Mohrs circle equations to determine maximum principal and shear stresses

6) Guess a material to use and size the components – pick bearings and gears from a catalog

based on static loads and fatigue life requirements

7) Use DET – Von-Mesis, or other static failure theory, to determine static margins of safety at

critical locations using some factor of safety relative to yield strength

8) Apply some empirical stress concentration factors based on manufacturing processes,

geometry, surface finishes, etc.

9) Calculate fatigue life of the components for some fatigue life criteria

10) If any components (gears, driveshaft, bearings, pillow blocks, etc.) do not meet criteria,

then resize and redo analysis

11) Select an AC motor to drive the system.

12) Perform detailed analysis of the spur and bevel gear tooth stress analysis – time permitting

– if desired

13) Optimize the design to reduce weight by taking out weight where not necessary – redo


14) Perhaps estimate cost of system by gathering cost information on components selected

from catalogs… or a trade-off analysis on cost versus weight…

15) Perhaps do FEA analysis using computer software like ProE, time permitting, if desired.

16) You could modify the design to include a motor, springs, or other mechanical elements if


Aptitudini: Inginerie, Design de fabricație, Inginerie mecanică

Vezi mai multe: using geometry, time complexity analysis, shear design, problem geometry, opposite of maximum, mechanical engineering cost, mechanical design software, mechanical design of machine components, mechanical design 1, life by design, geometry 2, gear design software, failure by design, element of design, element 8, element 14, design theory, cost of software engineering, cost estimate engineering, computer complexity

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( 0 recenzii ) denton, United States

ID Proiect: #9009519

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