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Proceedings Paper

The inspection of crack initiation in mid-plane by ultrasonic method
Author(s): Quanliang Liu; Yuejin Jiang; Sen Ge; Wanlin Guo
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Paper Abstract

Ultra-sonic is one of the major methods to inspect and locate the damage or flaws of materials in the components or structures in engineering1. The technique to inspect the crack initiation in mid-plane by ultrasonic in real time is presented and developed upon the requirement of detecting the initiation of cracks for thick compact tension specimen (CTS) to set up the I-II mixed mode fracture criterion. The paper is concerned with the application of an ultra-sonic scheme to detect initiation or growth of through-thickness crack at mid-plane from the surface during the loading. The technique in relation to the inspection of crack initiation in mid-plane by ultra-sonic is described in detail. The principles of the technique, and the equipment required to facilitate it are reviewed. The verification of the technique which is supported by a specific example of a CTS inspection performed on an I-II mixed mode fracture test shows that the method is valid and the technique can be capable of detecting delaminations, disbonds and lack-of-adhesion in a wide diversity of coated and uncoated materials. It is also capable of assessing the quality of composites.

Paper Details

Date Published: 15 April 2010
PDF: 8 pages
Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 75220Q (15 April 2010); doi: 10.1117/12.851485
Show Author Affiliations
Quanliang Liu, Xi'an Jiaotong Univ. (China)
AVIC I Aircraft Strength Research Institute of China (China)
Yuejin Jiang, AVIC I Aircraft Strength Research Institute of China (China)
Sen Ge, AVIC I Aircraft Strength Research Institute of China (China)
Wanlin Guo, Xi'an Jiaotong Univ. (China)
Nanjing Univ. of Aeronautics and Astronautics (China)


Published in SPIE Proceedings Vol. 7522:
Fourth International Conference on Experimental Mechanics

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