TUTORIAL $2$

For the pin$-$jointed truss in Tutorial $1($shown again below for convenience$)$ find the stresses in each member by considering:

a$)$ A solid tube of diameter $20mm$

b$)$ A hollow tube of diameter $20mm$ and thickness $4mm$

Given that the strength of both tube materials is $355\frac{N}{m}{m}^2,$ are any members likely to fail under this loading configuration and why? What would you propose to mitigate this failure?