The inspection of crack initiation in mid-plane by ultrasonic method

Quanliang Liu; Yuejin Jiang; Sen Ge; Wanlin Guo

doi:10.1117/12.851485

14 April 2010 The inspection of crack initiation in mid-plane by ultrasonic method

Quanliang Liu, Yuejin Jiang, Sen Ge, Wanlin Guo

Proceedings Volume 7522, Fourth International Conference on Experimental Mechanics; 75220Q (2010) https://doi.org/10.1117/12.851485
Event: Fourth International Conference on Experimental Mechanics, 2009, Singapore, Singapore

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.

Citation Download Citation

Quanliang Liu, Yuejin Jiang, Sen Ge, and Wanlin Guo "The inspection of crack initiation in mid-plane by ultrasonic method", Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 75220Q (14 April 2010); https://doi.org/10.1117/12.851485

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