stretch ratio
mechanics
Quick Summary
In mechanics, a stretch ratio quantifies how much a material deforms under stress. It is defined as the ratio of the deformed length of a material element to its original length. For instance, if a 100-millimeter bar stretches to 101 millimeters, its stretch ratio is 1.01. This concept is fundamental to understanding strain, which is the fractional change in length ((\lambda - 1)). Materials are tested to determine their response to stress, with ductility measuring a material's capacity for permanent deformation.123
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