2. Change in orientation (1 Orientation change and multislip (2) Geometrical softening in tension Schmid's law [=o coS/ cos at the onset of slip: t=tc=const =0, coS n, cOS Fcosn F cos/ cOS COS y个→4→a√cos COS② Geometrical softening in tension Schmid’s law at the onset of slip:  = cos cos = = const. C    y o o = cos cos o o o o A F A F      cos cos ) cos ( cos = =     o C     cos cos = 2. Change in orientation ① Orientation change and multislip