MT-1620 al.2002 3. Components of Stress (6) o“ Stress tensor' 2 subscripts= 2nd order tensor 6 independent components Extensional Shear O Note: stress tensor is symmetric due to equilibrium(moment)considerations Meaning of subscripts stress acts in n-direction stress acts on face with normal vector in the m-direction Paul A Lagace @2001 Unit 3-p. 9⇒ σ MIT - 16.20 Fall, 2002 3. Components of Stress (6) σmn “Stress Tensor” 2 subscripts ⇒ 2nd order tensor 6 independent components Extensional σ11 σ22 σ33 Note: stress tensor is symmetric σmn = σnm Shear σ12 = σ21 σ23 = σ32 σ13 = σ31 due to equilibrium (moment) considerations Meaning of subscripts: σmn stress acts in n-direction stress acts on face with normal vector in the m-direction Paul A. Lagace © 2001 Unit 3 - p. 9