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《Computerized Tomography Theory and Applications》 2005-04
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Theory Analysis of Crack Defect in CT Image

AO Bo,ZHANG Ding-hua,ZHAO Xin-bo,XU Xia-gang(The key Laboratory of Contemporary Design and integrated Manufacturing Technology,Ministry of Education,China,Xi’an 710072,China)  
Due to the influence of other factors,it is difficult to analyze damage measurements of materials directly using CT image.In this paper,firstly,beginning from computing angle of mass attenuation coefficient of mixture.By analyzing the calculation principle of mass attenuation coefficient.Getting the other one equivalent expressing;The formula among density variations induced by microcracks.CT image value and volume percent of crack defects is obtained under service environment;finally obtained the formula between volume percent of crack defects and damage variable.This lay a theoretical foundation for material fatigue life prediction by using CT.
【Fund】: 国家自然科学基金(项目编号50375126);; 航空科学基金(项目编号04I53069)资助
【CateGory Index】: TP391.41;
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