- #1
Solidsam
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Homework Statement
Homework Equations
Mx=200Nm
My=300Nm
Mz=600Nm
Normal stress caused by bending moment at A = Mc/I = (300*0.02)/((pi*0.02^4)/4)= 47.7MPa. This answer is correct.
Shear stress by Torsional Moment=Tc/J
Polar moment of inertia J=(pi/2)*c^4
So I did (600*0.02)/((pi*0.02^4)/2)= 47.7MPa Is this correct?
&
VQ/It=1000*((4*0.02)/3*pi)*((pi*0.02^2))/(1.257*10^-7*0.04)=10.47 MPa Is this correct?
One of the stress calculations is wrong beacuse when added that should equal 48.8 MPa
So what I'm I doing wrong?