LASER NON-DESTRUCTIVE DETECTIONOF DEFECT SLZE ON THE CEMENTATION STRUCTURE OF METAL PLATES
激光无损检测钣金胶接结构缺陷大小的判定

In this paper a circular plate that is fixed round the circumference and evenlyloaded is considered as defect model of cementation strucfure of metal plates. Fringedistrbuttons of the defect model in holography and speckle-shearing interferometryare computed,thus for each an experience formula determining defect size is established.The correctness of these formulae are well verified through experiments.