Product of Inertia (about Z and Y Axis): A measure of a shape's resistance to rotation about a specific axis, equal to the cross product of the distance from the axis to any point on the shape and the corresponding component of the point's moment of inertia.Other Parameters – These are more advanced results calculated by the full Sk圜iv Section Builder: The Plastic Section Modulus (S) – a measurement of the ability of a cross-section shape to resist plastic bending, used to estimate the stress of a material when it begins to yield (reach its plastic limit) under a specific load and is typically used for design and analysis of beams under load.Torsion Constant (J) – also known as the polar moment of inertia or J, is a value that describes a material's resistance to twisting or torsional deformation.For instance, Szt is the section modulus about the Z axis to the top fibre of the section. They are usually calculated to the top and bottom fibres section. Zz, Zy in Britain or Australia) – Also known as statical section modulus, and are used in bending stress calculations. Elastic Section Modulus (Sz, Sy in America.The calculator will provide this value, but click here to learn more about calculating the first moment of area. These are typically used in shear stress calculations, so the larger this value the stronger the section is against shearing. Like the Moment of Inertia, these are in both the Z and Y direction.
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