Engineering Science 1021A/B Lecture 13: Imperfections: Schmid's Law
17 May 2018
School
Department
Professor
Schmid's Law
The slip direction is at an angle (λ) to the applied force
•
Resolve the applied force into components parallel and perpendicular to the slip
direction
•
The slip plane is at an angle (
𝜙
) to the applied force
•
If the resolved shear stress (
"
#
$
) is greater than the critical resolved shear stress,
then the dislocation will move
•
Resolve Force:
𝐹
&= 𝐹 cos λ
•
Resolve Area:
𝐴&=$
-./ 0
•
Shear Stress:
𝜏&="
#
$#="
$cos λcos 𝜙 = 𝜎 cos λcos 𝜙
•
•
Schmid's Law
