This Problem and Solution Mechanics of Materials by Beer, John T. DeWolf

2.9  A block of 10-in, length and 1,8 x 1,6 in. Cross section is to support a centric compressive load P. The material to be used is a bronze for which E = 1,4 x 10⁶ psi. Determine the largest load which can be applied, knowing that normal stress must not excedd 18 ksi and that the decrease in length of the block should be at most 0,12 % of its original length.

Guru Solution

Considering allowable stress

σ = 18 ksi = 18 x 10³ psi

A = (1,8)(1,6) 2,88 in²

Considering allowable deformation

Smaller value governs

P = 48,4 x 10³lb

P = 48,4 kips 

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