https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:52035 Wed 27 Sep 2023 10:00:59 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:47688 Wed 25 Jan 2023 08:29:15 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:54390 circular-holed sample > elliptical-holed sample > inverted-U holed sample > square-holed sample. Irrespective of the hole shape, the primary tensile crack initiates at the top and bottom of the hole, but its development is trapped. The growth and coalescence of shear cracks near the sidewalls eventually give rise to the sample failure. Stress analysis around the holes reveals a positive dependence of the reduction in load capacity on the maximum compressive stress concentration which is controlled by the shape of the hole. This indicates that the amplification of compressive stress induced by the hole governs the rock collapse. These findings offer valuable insights for the design and construction of underground engineering projects.]]> Wed 21 Feb 2024 11:42:37 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48951 Wed 19 Apr 2023 12:46:56 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30773 Wed 11 Apr 2018 11:54:42 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46026 Wed 09 Nov 2022 11:54:15 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:44704 Wed 09 Nov 2022 10:24:27 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:52912 Wed 01 Nov 2023 09:22:24 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:31188 Sat 24 Mar 2018 08:42:54 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:53938  the intermediate principal stress σ2 > the minimum principal stress σ3 = 0), the biaxial compressive strength of granite presents a monotonous increasing trend with the σ2 increasing from 0 to 40 MPa, while the increasing rate of biaxial compressive strength increases firstly and then decreases with the increase in σ2. The rock failure induced by point/local fatigue loads with 5 kHz frequency was analyzed in this study. It shows that the fatigue life of granite is much shorter than that in the traditional full-section fatigue tests, which increases with the increase in σ2 and decreases as the upper level of the fatigue stress or predefined stress of σ1 increase. From the acoustic emission properties, the failure of rocks under biaxial confinements induced by point/local static or fatigue loads are mainly because of tensile cracks. Meanwhile, the application of a disturbance bar with a smaller cross-sectional area induces rock broken more quickly. It seems that the following measures can be used to improve rock breakage efficiency: increasing the predefined stress in the breaking direction, reducing the lateral confinement, using the breaking bar with a small cross-sectional area, and changing the static loading into the dynamic loading of the breaking force.]]> Mon 22 Jan 2024 16:48:53 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:42335 Mon 22 Aug 2022 12:58:17 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32980 Fri 17 Aug 2018 15:44:14 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32981 Fri 17 Aug 2018 15:43:48 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:44480 Fri 14 Oct 2022 08:57:31 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32484 Fri 08 Jun 2018 12:07:30 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:49127 Fri 05 May 2023 11:53:01 AEST ]]>