The second moment of area (otherwise known as moment of inertia) is a a measure of a shapes resistance to angular acceleration.The moment of inertia (otherwise known as second moment of area) is a a measure of a shapes resistance to angular acceleration.This can either be the elastic section modulus which considers the strength of the beam up to elastic yielding or the plastic section modulus which considers strength up to plastic yielding. The section modulus (otherwise known as the first moment of area) is a parameter which measures a section strength in bending.
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