|Mar25-09, 03:11 PM||#1|
Area Moment of Inertia
Okay, maybe I am retarded, but i am having trouble with this.
i need to find the equivalent spring constant K of a shaft with radius=r, length=l, and modulus of rigidity=G
I know that K=GJ/l
Question 1) Is J in this case the AREA moment of inertia? I think it is.
Question 2) Why can't I find online a formula for the J of a shaft?
I know the cross section is simply a circle and it is rotating about
a point passing through its center and perpendicular to the plane of the circle
I do not have a mechanics book with me (at work). Can anyone help me out here?
|Mar25-09, 07:26 PM||#2|
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