Question #$1$:

$[6$ points$]$

The following part has links with cross sections $8mm36mm.$ Each pin has a diameter of $16$ mm $.$

Determine:

a$)$ the reactions $($via external analysis$)$ at D and E $($you may assume $D_x=E_x=0$ since each link forms a truss$)$

b$)$ the stress in each vertical link

c$)$ the shear stress in each pin

d$)$ each bearing stress

e$)$ Given the pins are made out of structural steel and the links out of aluminum, does any part fail? If so$,$ where?

f$)$ Even if no parts fail, which parts are close to failure? How would you redesign in order to alleviate concerns from stakeholders?