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The Schmid factor m is part of the equation for the critical resolved shear stress τ0.

The critical resolved shear stress is the component of shear stress in a slip plane, resolved in the direction of slip, necessary to initiate slip in a grain (plastic deformation in metals).

m = cos(κ)cos(λ) ; τ0 = mσ

κ - the angle between the applied load direction and the slip plane normal.

λ - the angle between the applied load direction and the slip direction.

σ - the applied stress or load

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Q: What is the schmid factor?
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