The rigid beam is supported by the three posts A, B, and C of equal length Posts A and C have a diameter of 75 mm and are made of a material for which E 70 GPa and Iuml Y 20 MPa Post B has a diameter of 20 mm and is made of a material for which E ' 100 GPa and Iuml Y ' 590 MPa Determine the smalles...

M B 0 F A F C F al F y 0 F at 2F at 2P 0 a Post A and C will yield F al t al ...

The rigid beam is supported by the three posts A, B, and C of equal length. Posts

Question:

The rigid beam is supported by the three posts A, B, and C of equal length. Posts A and C have a diameter of 75 mm and are made of a material for which E = 70 GPa and Ïƒ_Y= 20 MPa. Post B has a diameter of 20 mm and is made of a material for which E' = 100 GPa and Ïƒ_Y' = 590 MPa. Determine the smallest magnitude of P so that

(a) Only rods A and C yield

(b) All the posts yield.

|-2 m¬|-2 m¬|–2 m¬|–2 m-|