Schmids factor - Material Science

Q.  Which among the following is known as Schmid's factor?
- Published on 05 Aug 15

a. (cos2 α) x (cos2 β)
b. (cos α) x (sin β)
c. (sin α) x (sin β)
d. (cos α) x (cos β)

ANSWER: (cos α) x (cos β)
 

    Discussion

  • Sravanthi   -Posted on 06 Oct 15
    - Critical resolved shear stress is the stress required to initiate slip in pure and perfect single crystal.

    - Critical resolved shear stress is given as τcr = σ cos α cos β
    Here the term cos α cos β is known as Schmid's factor and this equation is called as Schmid's law.

    - σ is magnitude of applied stress, β is the angle between slip direction and direction of force applied, α is the angle between direction of force applied and normal slip of plane.

    - Critical resolved shear stress is zero, if slip plane is parallel to tensile axis or if slip direction is at right angles to tensile axis.

    - Critical resolved shear stress is σ / 2, if both slip plane and slip direction are inclined at 45o to tensile axis.

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