MT-1620 al.2002 Stress-Strain (fully anisotropic) Primary(in-plane) strains 2 V,101+0 o6」(4 2 Ek= 6 0,+0 6 Invert to get aB= eaBoy& Secondary(out-of-plane)strains =( they exist, but they are not a primary part of the problem) 3 311 Paul A Lagace @2001 Unit 6-p. 5MIT - 16.20 Fall, 2002 Stress-Strain (fully anisotropic) Primary (in-plane) strains 1 ε1 = E1 [σ1 − ν12σ2 − η16 σ6 ] (3) 1 ε 2 = E2 [− ν21 σ1 + σ2 − η26 σ6 ] (4) 1 ε6 = G6 [−η61 σ1 − η62σ2 + σ6 ] (5) Invert to get: σ * αβ = Eαβσγ εσγ Secondary (out-of-plane) strains ⇒ (they exist, but they are not a primary part of the problem) 1 ε3 = E3 [− ν31σ1 − ν32σ2 − η36σ6 ] Paul A. Lagace © 2001 Unit 6 - p. 5