For the beam shown; calculate (a) the maximum bending stress; and (b) the bending stress at a point 0.75 in from the top of the beam at section 5 ft from left end of the beam 2000 lb 3000 lb 2 in 3 ft 4 ft 1 ft 5 in 5 ft Figure 5.5.4
Added by James R.
Step 1
5 in = 2.5/12 ft = 0.2083 ft Maximum bending stress, Ļ_max = M*y/I where I = (1/12)*b*h^3 = (1/12)*2*5^3 = 20.8333 in^4 = 20.8333/12^4 ft^4 Substitute the values: Ļ_max = (3375 lb-ft * 0.2083 ft) / (20.8333/12^4 ft^4) Ļ_max = 7000.2 lb/in^2 Show moreā¦
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