Specific strength has the same units as specific energy, and is related to the maximum specific energy of rotation that an object can have without flying apart due to centrifugal force.Īnother way to describe specific strength is breaking length, also known as self support length: the maximum length of a vertical column of the material (assuming a fixed cross-section) that could suspend its own weight when supported only at the top. The SI unit for specific strength is Pa⋅ m 3/ kg, or N⋅m/kg, which is dimensionally equivalent to m 2/s 2, though the latter form is rarely used. In fiber or textile applications, tenacity is the usual measure of specific strength. It is also known as the strength-to-weight ratio or strength/weight ratio or strength-to-mass ratio. The specific strength is a material's (or muscle's) strength (force per unit area at failure) divided by its density. For the stiffness to weight ratio, see specific modulus.
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