Part Ⅴ. Artificial Intelligence, Computer Processing and Simulation- MATHEMATICAL METHODS OF EXPERIMENTAL DESIGN IN NONDESTRUCTIVE TESTING

摘要

Non-destructive quality control of structural materials is based on the calibration dependence indirect non-destructive characteristic Z - material property R determined by both destructive and non-destructive tests. The form and character of the calibration expression depend on technological, physical and other factors (F_i) affecting both Z and R. However, the numerical values of F_i can differ: when the calibration dependence is determined in laboratory and when it is utilized in practice. Moreover, the influencing factors F_i can sometimes have an opposite effect on the material property. To improve the reliability of non-destructive testing, the calibration dependencies should be completed with the special experimental-statistical models of the regression coefficients depending on technological and physical factors. Such experimental-statistical models can be determined by mathematical methods of experimental design and used for more accurate estimation of the material properties in real testing conditions. The suggested approach is illustrated by the example of assessment of concrete strength using ultrasonic pulse velocity method.