Method for Damage Assessment of Ceramics after an Impact

Author:

Krashanitsa Roman1,Huiyang Luo 2,Weinong Chen 3,Shkarayev Sergey4

Affiliation:

1. Department of Aerospace and Mechanical Engineering The University of Arizona, AZ 85721

2. Department of Mechanical and Energy Engineering University of North Texas, Denton, TX 76207

3. AAE and MSE Schools, Purdue University, West Lafayette, IN 47907

4. Department of Aerospace and Mechanical Engineering The University of Arizona, AZ 85721,

Abstract

An image-processing method for damage assessment of ceramics after an impact is presented in this article. The method is based on the analysis of digital gray-scale images of the damaged surfaces and consists of successive steps of image enhancement, including normalization of light intensity, rotation of the light intensity space, histogram equalization, thresholding, and determination of the parameter characterizing the density of image distortions. The method allows the use of digital images taken under imperfect lighting conditions. The method was applied for damage assessment of AD995 ceramic specimens. The specimens were subjected to a double pulse loading generated with the help of the split Hopkinson pressure bar. As evident from the analysis of experiments, the parameter density of surface image distortions correlates strongly with the amplitude of the incident strain pulse as well as with the descriptive characteristics of the deformed shape of the specimen.

Publisher

SAGE Publications

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science,Computational Mechanics

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. An energy-based model for ballistic impact analysis of ceramic-composite armors;International Journal of Damage Mechanics;2012-03-27

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