MT-1620 al.2002 Next look at the Strain-Displacement equations 0 du consider: u exists, but 0 v exists but 0 No extensional strains in torsion if cross-sections are free to warp Paul A. Lagace @2001 Unit 10-p. 9MIT - 16.20 Fall, 2002 Next look at the Strain-Displacement equations: ∂u εxx = = 0 ∂x ∂v εyy = = 0 ∂y ∂w εzz = = 0 ∂z ∂u (consider: u exists, but ∂x = 0 v exists, but ∂v = 0) ∂y ⇒ No extensional strains in torsion if cross-sections are free to warp Paul A. Lagace © 2001 Unit 10 - p. 9