Hello guys, I need some help with my engineering homework.. Knowing that a = 1.2

Question

Hello guys,
I need some help with my engineering homework..

Knowing that a = 1.25 in., determine the largest value of P that can be applied without exceeding either of the following allowable stresses: tensile = 10 ksi , compression = 18 ksi.

Picture of problem: http://i39.tinypic.com/w1r5hy.png



So I approached it by:
= -(P/A)-((Mx*Z)/Ix)+((Mz*X)/Iz)

Mx = Px

Mz = Pz

solving for P I got
P = -( /((1/A)+((Z^2)/Ix)-((X^2)/Iz)
and setting it equal to the allowable stresses.

My textbook says the answer should be 53.9 kips .

Can someone tell me how to do it step by step on how to do this problem?

Thanks in advance.

Explanation / Answer

need more time to derive..

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.