Schmid's Law, named after the German engineer Erich Schmid, is a fundamental principle in the field of materials science and solid mechanics that describes the relationship between the applied stress and the resulting slip in crystalline materials during plastic deformation. It is particularly relevant to the study of single crystal materials. According to Schmid's Law, the critical shear stress required to initiate slip (plastic deformation) in a crystal is directly related to the applied normal stress.
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