Influence of wall thickness on the ultrasonic evaluation of small closed surface cracks and quantitative NDE

S. Reaz Ahmed; Masumi Saka

doi:10.1023/A:1019985425085

Influence of wall thickness on the ultrasonic evaluation of small closed surface cracks and quantitative NDE

S. Reaz Ahmed, Masumi Saka

ENG - Finemechanics

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

A new ultrasonic evaluation method has been developed for the quantitative characterization of smaller tight cracks under no load condition. In this approach, the ultrasonic testing is considered as an inverse problem to determine simultaneously the crack size and the extent of crack closure. The present paper is on the analysis of the influence of wall thickness on the evaluation of closed surface cracks from the inaccessible side of the wall. Based on experimental observation, the evaluation algorithm has been extended for the characterization of cracks with different wall thickness from the measured angle beam response. Evaluated results of both open and tightly closed small cracks with different wall thicknesses verify the method as a powerful tool for detecting and characterizing small surface cracks quantitatively.

Original language	English
Pages (from-to)	9-22
Number of pages	14
Journal	Journal of Nondestructive Evaluation
Volume	21
Issue number	1
DOIs	https://doi.org/10.1023/A:1019985425085
Publication status	Published - 2002 Mar

Keywords

Crack closure
Inverse problem
Small crack
Ultrasonic evaluation
Wall thickness

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering

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abstract = "A new ultrasonic evaluation method has been developed for the quantitative characterization of smaller tight cracks under no load condition. In this approach, the ultrasonic testing is considered as an inverse problem to determine simultaneously the crack size and the extent of crack closure. The present paper is on the analysis of the influence of wall thickness on the evaluation of closed surface cracks from the inaccessible side of the wall. Based on experimental observation, the evaluation algorithm has been extended for the characterization of cracks with different wall thickness from the measured angle beam response. Evaluated results of both open and tightly closed small cracks with different wall thicknesses verify the method as a powerful tool for detecting and characterizing small surface cracks quantitatively.",

keywords = "Crack closure, Inverse problem, Small crack, Ultrasonic evaluation, Wall thickness",

author = "Ahmed, {S. Reaz} and Masumi Saka",

note = "Funding Information: This work was partly supported by the Ministry of Education, Science, Sports and Culture under Grant-in-Aid for Scientific Research (B) (2) 10450042 and COE Research 11CE2003.",

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AU - Saka, Masumi

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AB - A new ultrasonic evaluation method has been developed for the quantitative characterization of smaller tight cracks under no load condition. In this approach, the ultrasonic testing is considered as an inverse problem to determine simultaneously the crack size and the extent of crack closure. The present paper is on the analysis of the influence of wall thickness on the evaluation of closed surface cracks from the inaccessible side of the wall. Based on experimental observation, the evaluation algorithm has been extended for the characterization of cracks with different wall thickness from the measured angle beam response. Evaluated results of both open and tightly closed small cracks with different wall thicknesses verify the method as a powerful tool for detecting and characterizing small surface cracks quantitatively.

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