Techno Press
Techno Press

Steel and Composite Structures   Volume 22, Number 2, October10 2016, pages 399-409
DOI: http://dx.doi.org/10.12989/scs.2016.22.2.399
 
Developing brittle transparent materials with 3D fractures and experimental study
Jing Wang, Shucai Li, Weishen Zhu and Liping Li

 
Abstract     [Full Text]
    The fracture propagation mechanism and fractured rock mass failure mechanism were important research in geotechnical engineering field. Many failures and instability in geotechnical engineering were related on fractures propagation, coalescence and interaction in rock mass under the external force. Most of the current research were limited to two-dimensional for the brittleness and transparency of three-dimensional fracture materials couldn't meet the requirements of the experiment. New materials with good transparent and brittleness were developed by authors. The making method of multi fracture specimens were established and made molds that could be reused. The tension-compression ratio of the material reached above 1/6 in normal temperature. Uniaxial and biaxial loading tests of single and double fracture specimens were carried out. Four new fractures were not found in the experiment of two-dimensional fractures such as the fin shaped crack, wrapping wing crack and petal crack and anti-wing crack. The relationship between stress and strain of the specimens were studied. The specimens with the load had experienced four stages of deformation and the process of the fracture propagation was clearly seen in each stage. The expansion characteristics of the fractured specimens were more obvious than the previous research.
 
Key Words
    rock with fractures; transparent and brittle material; prefabricating crack; 3D crack extending; failure law
 
Address
Geotechnical and Structural Engineering Research Center, Shandong University, No. 17923, Jingshi Road, Jinan, 250061, P.R. China.
 

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