The principal in-plane stresses and associated strains in a plate of material are σ1 = 50 ksi, σ2 = 25 ksi, ε1 = 1050 µ, and ε2 = 195 µ. (a) This is a plane stress state, meaning the principal stress normal to this plane is zero. Is the principal strain ε3 acting normal to this plane also zero? Show why or why not. Draw the 3D Mohr’s circle for both stress and strain states.
(b) Determine the Modulus of Elasticity, E.
(c) Determine Poisson’s ratio, ν.

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explanation:

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only