Question

The composite bar BCD in the figure is composed of an inner aluminum cylindrical core of length 2l=2m and radius R=1cm and a sleeve of steel of length L=1m and thickness R=1cm surrounding the aluminum core in the CD section of the bar. The Young’s moduli are:Eal= 70Gpa = , andEsteel=210GPa . The bar is fixed at B and a concentrated tensile load F is applied at the free end D . The resulting total elongation of bar BCD , is 1cm . Determine the normal stress in the steel sleeve.
0.4 mm for last problem.

Anyone for MPa first problem please?
First par please and the others?
Anyone please?
Determine the normal stress in the steel sleeve.
plz help?
-86.8 MPa
thanhs Pa.

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