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The Radius of Gyration kx of an Area (A) about an axis (x) is defined as:
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kx
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Where Ix is the Moment of Inertia about the axis (x), and A is the area. If no axis is specified the centroidal axis is assumed.
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Using the Perpendicular Axis Theorem and from above it can be shown that:
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The Radius of Gyration kxx of a Mass (m) about an axis (x) is defined as:
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Where I is the Moment of Inertia about the axis (x), and m is the mass.
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If no axis is specified the centroidal axis is assumed.
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Radius of Gyration Definition and Concept
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