[1] Yang Liyun, Yang Renshu, Zhao Xuenan, Fang Shizheng, et al. Caustics study of the effect of glass fibreson dynamic fracture of hardened cement paste [J]. Journal of Southeast University (English Edition), 2014, 30 (4): 475-479. [doi:10.3969/j.issn.1003-7985.2014.04.013]

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Caustics study of the effect of glass fibreson dynamic fracture of hardened cement paste()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

30

Issue:

2014 4

Page:

475-479

Research Field:

Materials Sciences and Engineering

Publishing date:

2014-12-31

Info

Title:

Caustics study of the effect of glass fibreson dynamic fracture of hardened cement paste

Author(s):

Yang Liyun;  Yang Renshu;  Zhao Xuenan;  Fang Shizheng

School of Mechanics and Civil Engineering, China University of Mining & Technology, Beijing 100083, China

Keywords:

reflected optical caustics;  cement paste;  glass fibre;  dynamic fracture;  dynamic stress intensity factor

PACS:

TB301

DOI:

10.3969/j.issn.1003-7985.2014.04.013

Abstract:

The reflected optical caustics method is applied to study dynamic fracture problems in hardened cement paste. First, both the unreinforced cement paste and the glass fibres reinforced cement paste specimens were fabricated and the reflective coating on the surface of the specimen was prepared. Secondly, the crack path and the shadow spot patterns during the crack propagation process for the two specimens were recorded by using a multi-spark high speed camera. Thirdly, some dynamic parameters of two cement paste specimens, including crack onset time, the dynamic stress intensity factor and crack growth velocity were determined and analyzed comparatively. This indicates that the glass fibres can improve the fracture resistance and delay fracture time. These results will play an important role in evaluating the dynamic fracture properties of cement paste.

References:

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Memo

Memo:

Biography: Yang Liyun(1983—), male, doctor, lecturer, yangly@cumtb.edu.cn.
Foundation items: The Ph.D. Programs Foundation of Ministry of Education of China(No.20120023120020), the National Natural Science Foundation of China(No.51404273).
Citation: Yang Liyun, Yang Renshu, Zhao Xuenan, et al.Caustics study of the effect of glass fibres on dynamic fracture of hardened cement paste[J].Journal of Southeast University(English Edition), 2014, 30(4):475-479.[doi:10.3969/j.issn.1003-7985.2014.04.013]

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