Use the 4-segment chart for strength-limited design of Fig. 10.12 of the text to compare the mass
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Use the 4-segment chart for strength-limited design of Fig. 10.12 of the text to compare the mass per unit length, \(m / L\), of a section with \(Z \sigma_{f}=10^{4} \mathrm{Nm}\) (where \(Z\) is the section modulus) made from
a. 6061 grade aluminium alloy with a shape factor \(\phi_{B}^{f}\) of 3 , strength \(\sigma_{f}=200 \mathrm{MPa}\) and density \(ho=2700 \mathrm{~kg} / \mathrm{m}^{3}\), and
b. titanium alloy with a shape factor \(\phi_{B}^{f}\) of 10 , strength \(\sigma_{f}=480 \mathrm{MPa}\) and density \(ho=4420 \mathrm{~kg} / \mathrm{m}^{3}\).
Data From Fig, 10.12
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