MT-1620 al.2002 Figure 3.6 Differential element in rectangular system 4 NOTE: If face has a negative normal positive stress is in negative direction -- Compare notations Tensor Engineering 23 sometimes 0 used for shear stresses Paul A Lagace @2001 Unit 3-p. 10MIT - 16.20 Fall, 2002 Figure 3.6 Differential element in rectangular system NOTE: If face has a “negative normal”, positive stress is in negative direction --> Compare notations = τyz sometimes = τxz used for = τxy shear stresses Tensor Engineering σ11 σx σ22 σy σ33 σz σ23 σyz σ13 σxz σ12 σxy Paul A. Lagace © 2001 Unit 3 - p. 10