MT-1620 al.2002 Thus Ex=f+左2y+f2 Then use this in the stress-strain equation (orthotropic or "lower) +a△T E (include temperature effects Note: ignore" thermal strains in y and Z. These are of secondary" importance Thus O=EE.-Ea△T and using the expression for Ex E+y+2)-Ea△T Can place this expression into the expression for the resultants (force and moment) to get Paul A Lagace @2001 Unit 14-9Unit 14 - 9 Paul A. Lagace © 2001 MIT - 16.20 Fall, 2002 Thus: ε xx =+ + f fy fz 12 3 Then use this in the stress-strain equation (orthotropic or “lower”): ε σ xx α xx E = + ∆T (include temperature effects) Note: “ignore” thermal strains in y and z. These are of “secondary” importance. Thus: σ εα xx xx = E ET − ∆ and using the expression for εx: σ α xx = ++ E f fy fz E T ( ) 12 3 − ∆ Can place this expression into the expression for the resultants (force and moment) to get: