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Q: Find the angle of twist per metre length of a hollow shaft of 100 mm external diameter and 60 mm internal diameter if the shear stress is not to exceed 35 MPa. Take modulus of rigidity G 85 GPa.?

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youngs modulus, modulus of rigidity, bulk modulus.

Go to this web site: http://www.engineeringtoolbox.com/modulus-rigidity-d_946.html

0.494GPA

modulus of elasticity = 15 Msi; poisson ratio = 0.3 modulus of rigidity = E/ ((2(1 + poisson)) = 5.8 Msi

modulus of rigidity = G modulus of elasticity = E for isotropic materials G = E / ((2(1+u)) whre u = poisson ratio G is also known as shear modulus

G = E/2(1+u) where G = mod of rigidity and u =poisson ration and E = young modulus

It is around 40 GPa.

it is 14.67n/m3

E=3K(1-(2/m))

http://www.engineeringtoolbox.com/modulus-rigidity-d_946.html

high

23 GPa

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