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For
a sample of uniform cross-section subjected to a constant torque, T, the angular
displacement, f ,at a distance
L from the fixed end is given by: f =
TL/JG. Use
this relationship to obtain a value for the shear modulus, G, of the sample
material. Compare this value with published values.
What conclusions
can you draw about the selection of materials for torsion loads in HPVs? Are
there practical limits on the value of J that can be obtained with a fixed mass
of a given material? What is the cause of these limits?
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