Mechanical Engineering - Strength of Materials - Discussion

Discussion Forum : Strength of Materials - Section 7 (Q.No. 37)
37.
The Young's modulus of a material is 125 GPa and Poissons ratio is 0.25. The modulus of rigidity of me material is
30 GPa
50 GPa
80 GPa
100 GPa
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
4 comments Page 1 of 1.

Karan said:   4 years ago
If the modulus of elasticity is 100 GPa and Poisson's ratio is 0.2 then the modulus of rigidity and bulk modulus respectively.

Debashis Das said:   4 years ago
Young modulus(E)= 125GPa,
Poisson ratio(1/m)=(1/0.25)= 4.
Formula, Mod of rigidity(G)= (m.E)/{2(m+1)}= 50GPa.

Manohar said:   1 decade ago
E = 2G(1+nue) Where nue = poisson ratio.

125 = 2G(1+.25).

125 = 2.5G.

G = 50 GPa.

Zahraa khaleel said:   2 years ago
m = 1/0.25 = 4,
C = 125 * 4/2(4 + 1) = 50.

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