2.4-1 The assembly shown in the figure consists of a brass core (diameter di = 0.25 in.) surrounded by a steel shell (inner diameter d? = 0.28 in., outer diameter d3 = 0.35 in.). A load P compresses the core and shell that both have a length L = 4.0 in. The moduli of elasticity of the brass and steel are Eb = 15 x 10 psi and Es = 30 x 10 psi, respectively. (a) What load P will compress the assembly by 0.003 in.? (b) If the allowable stress in the steel is 22 ksi and the allowable stress in the brass is 16 ksi, what is the allowable compressive load Pallow? (Suggestion: Use the equations derived in Example 2- 8.) Steel shell Brass core L d3 PROBLEM 2.4-1