Can I read Time-dependent Cracking and Brittle Creep in Macrofractured Sandstone on EtoBox?

Time-dependent Cracking and Brittle Creep in Macrofractured Sandstone by Xue, Yanchao (author);Xu, Tao (author);Heap, Michael J. (author);Meredith, Philip G. (author);Mitchell, Thomas M. (author);Wasantha, P.L.P. (author) is a Engineering article available to read on EtoBox.

What is Time-dependent Cracking and Brittle Creep in Macrofractured Sandstone about?

Time-dependent cracking and brittle creep of rock is fundamental to understanding the long-term evolution and dynamic failure in underground rock engineering. In the present paper, we present a systematic laboratory investigation into the control of single open macrofractures of differing orientations on time-dependent cracking and brittle creep in sandstone using digital image correlation (DIC). For a given macrofracture inclination angle β, we find that the failure of macrofractured sandstone under a constant stress is accompanied by the generation of more tensile fractures (wing cracks and secondary cracks) than in our constant strain rate experiments. This result differs from experiments performed on intact sandstones, for which macroscopic failure under a constant stress and constant strain rate were essentially identical. The nucleation site for the wing cracks is β-dependent. As β is increased, the crack nucleation position gradually moves from the center of the fracture towards the fracture tip with a decreasing speed. The kink angle of the secondary crack (k 1) increases quasi-linearly with the increase of fracture angle γ. With the increase of the secondary crack angle θ,

Who reads Time-dependent Cracking and Brittle Creep in Macrofractured Sandstone?

Author

Xue, Yanchao (author);Xu, Tao (author);Heap, Michael J. (author);Meredith, Philip G. (author);Mitchell, Thomas M. (author);Wasantha, P.L.P. (author)

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)