Damage Analysis for Quasi-Birttle Materials of CT Image under Uniaxial Compression

Abstract:

In the damage research before on the CT image of quasi-brittle materials such as concrete, the damage evolution is often described by the change of average CT values or image threshold segmentation method. However, the evolution of average CT values is insensitive to the damage, and the threshold value is always not only, which grimly depends on the researchers’ judgment. Because CT image is a gray image and different grayscale expresses different density distribution, it is tried in the paper to express the variety of material density with variety of grayscale of CT image. A description index of Rd from fractal theory is introduced in the paper to describe the variety of grayscale. Thereby, a damage variable is defined by Rd index, which can be used to study the developing process and evolving rule of concrete damage.

• Periodical: Advanced Materials Research (Volumes 168-170)
• Pages: 373-379
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.168-170.373
• Online since: December 2010
• Authors: Cheng Yi, Hong Guang Zhu, Li Zhen Liu
• Keywords: CT, Damage, Material, Quasi-Brittle, R_d Index

References

[1] Stock S R, Naik N K, Wilkinson A P: Cement and Concrete Research. Vol. 32(2002), P. 1673.

[2] Chotard T J, Boncoeur_Martel M P, Smith A: Cement&Concrete Composites. Vol. 25(1)(2003), P. 145.

[3] Kawakata H, Cho A, Kiyama T: Tectonophysics. Vol. 313 (1999),P. 293.

[4] Lawer J S, Keane D, Shah S P : ACI Materials Journal. Vol. 98(6)(2001), P. 465.

[5] Gengshe Yang, Dingyi Xie: Chinese Journal of Rock Mechanics And Engineering. Vol. 15(1) ( 1996),P. 48 (In Chinese).

[6] Gengshe Yang , Jun Sun, Dingyi Xie: Mechanics and Engineering. Vol. 20(1998),P. 47(In Chinese).

[7] Gengshe Yang, Dingyi Xie: Chinese Journalof Rock Mechanics and Engineering. Vol. 18(3) (1999),P. 250(In Chinese).

[8] Weihua Ding, Yanqing Wu, Yibin Pu: Journal of Xi'an University of Technology. Vol. 16 (1) (2000),P. 109 . (In Chinese).

[9] Houqun Chen, Weihua Ding, Faning Dang: Journal Of China Institute Of Water. Vol. 4(1) (2006),P. 1 (In Chinese).

[10] Shangzhi Zhou, Faning Dang, Houqun Chen: Journal Of Xi'an University Of Technology. Vol. 22(4)(2006),P. 355(In Chinese).

[11] Xiaotao Yin, Xiurun Ge, Faning Dang: Concrete. Vol. 202(2006),P. 21 (In Chinese).

[12] Fen Li, Zhida Li, Junan Gong: Natural Science Journal Of Xiangtan University. Vol. 28(2)(2006), P. 52 (In Chinese).

[13] Bingguo Zhang, Fen Li, Wenlin Xiong: Road. Vol. 10(2006),P. 152(In Chinese).

[14] Jian-Xi Ren, Xing-Tian Hui: Rock And Soil Mechanics. Vol. 26(2005) Supp,P. 18 (In Chinese).

[15] Cheng Yi, Liang Zhang, Zhonghui Chen: Journal of China University of Mining & Technology. Vol. 36(1)( 2007),P. 75 (In Chinese).

[16] Cheng Yi, Hongguang Zhu, Xuping Zhu: Journal of the Chinese Ceramic Society. Vol. 37(1) (2009), P. 50 (In Chinese).