# Compute the stresses (laminate coordinates) at z = −1.27 mm using the results of Exercise…

Compute the stresses (laminate coordinates) at z = −1.27 mm using the results of Exercise 6.18. Note that θ = 30°.

Exercise 6.18

Given = = , = 0 and κ_{x }= 1.0 m^{−1} , κ_{y} = 0.5 m^{−1} , κ^{xy} = 0.25 m^{−1} , scold the strains (in laminate coordinates) at z = −1.27 mm in the laminate of Exercise 6.7.

Exercise 6.7

Find σ_{1}, σ_{2}, and σ_{6} at z = 0, on twain laminae of a laminate [±30]T topic to N= = 1 N/m (all cherishing forces and moments correspondent to naught), delay t_{1} = t_{2} = 1.27 mm, E_{1} = 137.8 GP a, E= = 9.6 GP a, G= = 5.2 GP a, ν_{12} = 0.3.