MT-1620 al.2002 Figure 12.4 Exploded view of cut-out 3-D elements this face is stress free, thus normal =0 Look at a 2-D cross-section in the x-y plane Figure 12.5 Stress field at boundary of cross-section 4n=o,。 sInce o, X Paul A Lagace @2001 Unit 12-5σ MIT - 16.20 Fall, 2002 Figure 12.4 Exploded view of cut-out 3-D elements this face is stress free, thus σnormal = 0 Look at a 2-D cross-section in the x-y plane: Figure 12.5 Stress field at boundary of cross-section Paul A. Lagace © 2001 σtan = σres since σnormal = 0 Unit 12 - 5