Still having some issues with how to compare the weight per unit length of the two rods. I'm given E=108x10^3MPa, weight density= 7.78x10^4N/m^3 for both rods, calculated I=117.85 for solid bar. Using the equation Ymax= cFl^3/EI where c=constant, l=1.
So please advise on how to proceed here...
Ok so this is what I have so far:
for the soild bar
find area
A=1/4(pie)(dia)^2 -> =38.48mm^2
find moment
I=Pie/64(D^4) -> = 117.85mm^4
Find stress
stress=My/I where M=bending moment, y=neutral axis, I=moment
-> =M(3.5)/117.85 -> stress=.0297(M)
for this equation I don't know how to find M...
Hello,
Not sure how to go about solving this problem:
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