... +gµsin 2ψ sin θ)dθ.142 5 Ultimate State of Structures at Small Non-Linear StrainsPutting (5 .68 ) into the first static equation (5 .65 ) we find(gµsin 2ψ)− 2gµcos 2ψ =0. (5.70) In the ... =0informmaxτe= 2M(sin2λ)/B 6 . (5. 76) Diagram max τe(λ) is drawn by solid line in Fig. 5.13. From relations (5 .60 ),(5.73) we derive expression (5.22) with sign minus and hence, solid lines ... θ)dθ,Y=rλ−λ(σrcos θ + τ sin θ)dθwith a help of (5 .65 ), (5 .66 ) can be rewritten asλλ(f sin θ)dθ,λλ(f cos θ)dθand according to (5 .66 ), (5 .67 ) they are equal to zero.Now...