Consider a single crystal of a hypothetical metal that has the BCC crystal structure. A stress of 50 MPa is applied in the [101] direction of the BCC unit cell. a. Determine the most favourable slip direction for the (011) slip plane of the BCC unit cell. ⟨111⟩ is the family of directions with the highest linear density in the BCC unit cell. b. If τcrss = 27.5 MPa, determine if the single crystal yields. If not, what stress level is required? c. What is the minimum stress at which the BCC single crystal yields?

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Torsion

In mechanical engineering, torque, torsion, and twisting moment are three of the most important concepts which have different meanings. Torque is the consequence of a moment of a force that produces an angular acceleration in a body or induces rotational kinetic energy in a body. For instance, in an automobile, the power transmission shaft is a body that is always under rotation due to the external torque acting on it, this torque is created by the engine.