Numerade

Abhishek G.

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The stress-strain diagram shown has been drawn from data obtained during a tensile test of a specimen of structural steel. Using $E=29 \times 10^{6}$ psi, determine ( $a$ ) the modulus of resilience of the steel, $(b)$ the modulus of toughness of the steel.

A column of 5.5 -m effective length is made of the aluminum alloy $2014-\mathrm{T} 6$ for which the allowable stress in bending is $220 \mathrm{MPa}$ Using the interaction method, determine the allowable load $\mathbf{P}$ knowing that the eccentricity is $(a) e=0,(b) e=40 \mathrm{mm}$.

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INSTANT ANSWER

2. Prove that $ 2 x<\log \frac{1+x}{1-x}<2 x\left[1+\frac{1}{3}\left(\frac{x^{2}}{1-x^{2}}\right)\right] $ for $ x \in(0,1) $.

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