MT-1620 al.2002 Secondary 13 5=0 dy 12 013 and 23 exist but do not enter into primary consideration Strain-Displacement au E11 22 (4) dy2 e12-2(y2 dy Assumptions d 0, W=0 gIve 13 23 33 Plane strain) Paul A Lagace @2001 Unit 6-p. 12MIT - 16.20 Fall, 2002 Secondary ∂σ13 + ∂σ23 + f3 = 0 ∂y1 ∂y2 σ13 and σ23 exist but do not enter into primary consideration Strain - Displacement ε11 = ∂u1 (3) ∂y1 ε22 = ∂u2 (4) ∂y2 ε12 = 1  ∂u1 + ∂u2  (5) 2  ∂y2 ∂y1  Assumptions  ∂ = 0, w = 0 give:  ∂y3  ε13 = ε23 = ε33 = 0 (Plane strain) Paul A. Lagace © 2001 Unit 6 - p. 12