Automatic detection of L and T shaped cracks in semifinished casting products

10th International Symposium Machine and Industrial Design in Mechanical Engineering

工业技术;机械制造

Gillich, G.R.^1 ; Tufisi, C.^1,2 ; Korka, Z.I.^1 ; Hamat, C.O.^1 ; Gillich, N.^1

Universitatea Eftimie Murgu Resita, P-ta Traian Vuia 1-4, Resita

320085, Romania^1

Spaleck SRL, Str. Castanilor 113, Resita

320022, Romania^2

关键词: Automatic Detection;    Crack patterns;    Crack position;    Detection process;    Frequency shift;    Relative frequencies;    Test specimens;    Vibration response;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/393/1/012016/pdf
DOI  :  10.1088/1757-899X/393/1/012016

学科分类：工业工程学

来源: IOP

【 摘 要 】

The paper presents a method to detect cracks with a complex shape in semi-finished casting products, which bases on the vibration response of the tested element. Firstly, we contrived relative frequency shift curves for beams subjected to L and T shaped cracks by means of the finite element method. The curves were plotted for numerous crack positions along the test specimen and used to contrived crack patterns, which consist of a set of frequency shifts for several weak-axis out-of-plain modes. The patterns are collected in a database and are used as a benchmark in the damage detection process. At the end of the paper, we demonstrate through an experiment how a visual method can be used in an automated damage detection procedure to identify a crack with a complex shape.