![]() ![]() The diagonally opposite corners of a 3D box that encloses the solid.Ī 3D point that is the center of mass for solids. ![]() The amount of 3D space that a solid encloses. The density is always a value of 1.00, so the mass and volume have the same value. A third value included in the results is somewhere between the high and low values. The moment of inertia is lowest through the second axis that is normal to the first axis and that also passes through the centroid. The moment of inertia is highest through a certain axis at the centroid of an object. ![]() Principal moments and X,Y,Z directions about centroidĬalculations that are derived from the products of inertia and that have the same unit values. Radii of gyration are expressed in distance units. Gyration_radii = (moments_of_ inertia/body_mass) 1/2 This XY value is expressed in mass units times the length squared.Īnother way of indicating the moments of inertia of a 3D solid. Product_of_inertia YZ,XZ = mass * centroid_to_YZ * dist centroid_to_XZ The formula for product of inertia for the YZ plane and XZ plane is It is always calculated with respect to two orthogonal planes. Property used to determine the forces causing the motion of an object. The area moments of inertia has units of distance to the fourth power. The formula for determining area moments of inertia isĪrea_moments_of_inertia = area_of_interest * radius 2 Additional mass properties for coplanar regionsĪ value used when computing the distributed loads, such as fluid pressure on a plate, or when calculating the forces inside a bending or twisting beam. ![]()
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