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Torsional rigidity of a composite shaft in parallel

Your expression is correct, the proof is carried out below for the left segment of the composite bars: From static force equilibrium, we have $T = T_1 + T_2$ ----- (1) Furthermore, the angle of twist $...
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Ideal design for a long fruit plucking pole

You will want a material with a high stiffness, and strength to weight ratio. If cost is no object, then carbon fiber is probably the best option. Fiberglass, titanium and aluminum are also good ...
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Determining the angle theta at the Mohr's Circle

There are two different angle $\theta$'s. one is the normal stress angle $\theta_p $between the stress axis, X, and point a(x,s) on the mohr circle. The other is shear stress angle $\theta_s$ from the ...
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