Research on Properties of Materials Based on Extension Evaluation Method

The matter-element model of mechanical properties of materials for grade-evaluating is established based on the matter-element theory and extension evaluation theory in the Extencis. Then the dependent function derived from extension set is used to calculate integrated correlation degree, after the Weight of each evaluation index is determined, then the grade of corresponding material will be obtained. take the metal materials for example, the results have proved that this kind of extension evaluation method applied is sure to be more scientific、normative, fair, and reasonable, which deserves to be populated and generalized.