A plot comparing material property ranges, often on logarithmic axes. Constant material performance index values appear as straight guidelines when the index is a product of powers of the plotted properties. A family region is a screening aid, not a certified property value for every grade or loading direction.
A combination of material properties to maximize or minimize after eliminating free geometric variables from an engineering objective and constraints. Changing a geometric constraint can change the index: strength-limited rectangular cantilevers give with fixed height, but with fixed width.
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Material selection is the process of choosing appropriate materials for a specific application or product based on various criteria. It involves evaluating different materials based on their properties, performance, cost, availability, and environmental impact. The main objective of material selection is to ensure that the chosen materials meet the mechanical, thermal, electrical, and chemical requirements of the application, while also being cost-effective and sustainable.