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	1. Crack tip deformation measurement using single-element extended digital image correlation
	Chen Jinlong,Zhang Xiaochuan,Zhan Nan
	Mechanics 18 December 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Since the crack tip displacement field influences the crack paths under both fatigue and fracture conditions strongly, it is very important to develop a test method with high accuracy to measure this deformation parameter. Single-element extended digital image correlation (X-DIC) using the enrichment function to describe the crack tip singularity, which could measure the discontinuous deformation directly. Simulated images are used to verify the performance of single-element X-DIC, the measured crack tip displacement field is in accordance with the given value. Displacement fields of the compact tension specimen under pure mode I loading condition was measured. The influence to the measurement accuracy caused by the crack width，subset size and subset location was discussed. All results in this paper show that single-element X-DIC could be used to measure the crack tip displacement field with high accuracy.
	TO cite this article:Chen Jinlong,Zhang Xiaochuan,Zhan Nan. Crack tip deformation measurement using single-element extended digital image correlation[OL].[18 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4505660


	2. Non-destructive in-situ measurements on interface failure of brittle coating/ductile substrate systems by digital image correlation and acoustic emission techniques
	Mao Weiguo,D. J. Wu,C. Lu
	Mechanics 17 June 2011
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:In this paper, we proposed a non-destructive measurement method combined with digital image correlation and acoustic emission techniques to in-situ monitor the interface failure and internal damage of brittle coating/ductile substrate systems under different size scales. We established a good correspondence relationship between digital image correlation and acoustic emission results to judge coating failure. The method was utilized to successfully determine the fracture toughness of thermal barrier coating systems during bending tests.
	TO cite this article:Mao Weiguo,D. J. Wu,C. Lu. Non-destructive in-situ measurements on interface failure of brittle coating/ductile substrate systems by digital image correlation and acoustic emission techniques[OL].[17 June 2011] http://en.paper.edu.cn/en_releasepaper/content/4432729

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