Strain analysis of pressure vessels contained pits based on digital image correlation method

Wan Xu; Xiu Feng; Junrui Li; Xinfeng Shi; Tian Bai

doi:10.1117/12.2211507

26 January 2016 Strain analysis of pressure vessels contained pits based on digital image correlation method

Wan Xu, Xiu Feng, Junrui Li, Xinfeng Shi, Tian Bai

Proceedings Volume 9903, Seventh International Symposium on Precision Mechanical Measurements; 990310 (2016) https://doi.org/10.1117/12.2211507
Event: Seventh International Symposium on Precision Mechanical Measurements, 2015, Xia'men, China

Abstract

This investigation applied the digital image correlation technique (DIC) on a pressure vessel that contained several surface pit defects under high pressure. Data on the deformation of the defects and peripheral area is obtained by this method. The results show that the stress and strain increase with the depth among different pits and are the largest at the bottom of any given pit. This method has proven to be a good choice for this type of experiment, where elastic and plastic surface strains need to be measured. The DIC can satisfy the requirements of being in situ, in real time, full-field and make non-contact measurements with more accurate and obvious experimental results compared with traditional measurement methods and pressure vessel test regulations. Also, it is a new, effective way for monitoring defects in online pressure vessels as well as a reliable basis for pressure vessels’ safety evaluation.

Citation Download Citation

Wan Xu, Xiu Feng, Junrui Li, Xinfeng Shi, and Tian Bai "Strain analysis of pressure vessels contained pits based on digital image correlation method", Proc. SPIE 9903, Seventh International Symposium on Precision Mechanical Measurements, 990310 (26 January 2016); https://doi.org/10.1117/12.2211507

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