A tension member of length L = 2.0 m is made of brass (Y = 210 MPa and E = 82.7 GPa). The member is required to absorb a design energy of 20 kJ with a safety factor of 2.5 compared to the energy absorbed at yield.
a. For this design energy, what must the cross-sectional area of the member be?
b. What is the axial stress σ in the member at the design energy?
c. Determine the ratio Y/σ. Why is this ratio not equal to the safety factor of 2.5?
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