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Keywords: strain rate
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Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-033
... of the disc must be greater than 19.5°. In the current study, an attempt has been made to investigate the sensitivity of the strain rate to various geomechanical properties (tensile strength and fracture toughness) of a homogeneous fine-grained sandstone by using FBD specimens. The strain rates were varied...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-120
... & Gas Brazilian test specimen Deccan basalt diameter specimen strain rate Procedia Engineering 191 ( 2017 ) 946 953 1877-7058 © 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (httpcreativecommons.org/licenses/by-nc-nd/4.0 Peer-review...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-001
... that the dynamic peak stress increases with increasing strain rate whereas the elastic modulus does not show any clear trend with increase in strain rate. Dynamic force equilibrium at the incident and transmission bar ends of the rock samples is attained in all tests till the failure of the rock samples. Dynamic...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-125
... ABSTRACT: This paper presents static and dynamic experimental characterization of quartzite rock subjected to static unconfined compressive strength test and dynamic split Hopkinson pressure bar (SHPB) tests. The dynamic compression tests on rock samples are performed at strain rates from 10...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-127
... and failure criteria is required to design an optimum support system. The drop weight test is commonly used to simulate the rockburst or blasting effect on rock and rock support systems, which give rise to a strain rate in the order of 10 s −1 equivalent to a 250 μs loading duration (Bischoff & Perry...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-119
..., followed by explanations of the physical mechanism lying behind. The simulation results show that the duration of platform section of the incident waveform increases with the striker length. A constant strain rate can be achieved if the special octagon-shape striker is adopted due to the slowly arising...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-149
... hydrodynamic cohesive behaviour equation continuum model rock fracture SPH fracture constitutive model strain rate ABSTRACT: This paper presents a new numerical approach to modelling rock fracture and fragmentation by combining the advantages of the mesh-free smoothed particle hydrodynamic (SPH...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-111
... sandstone compression test weak bedding plane strain rate bedding plane Abstract Clay- and marlstone are low permeable rocks suitable to host radioactive waste. However, their strong layering might cause stability problems, at least when oriented at an unfavourable angle to σ1. We carried out...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-044
... Centigrade) are carried out, from which the creep curves as well as exponential functions of strain rate during the steady creep stage and creep constitutive equations of rock salt are obtained. Creep function for the rheological model is also presented in this study. The study results show that: (i...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-010
... constant parameters which can be easily obtained from triaxial tests. Poisson s ratio is assumed to be constant in the elastic domain and is used to calculate the shear (GM ) and bulk (BM ) modules according to the elastic modulus as: The elastic strain rate is then calculated by the elastic Hooke s law...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-011
... particles during the cyclic wetting and drying. When the times of wetting and drying cycle is certain, the dynamic energy absorbed by sandstone specimen increases in a power relation with the strain rate increasing. And when strain rate is certain, the dynamic energy absorbed by sandstone specimen decreases...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-126
... Bieniawski strain rate reservoir geomechanics relation Hashiba testing environment long-term stability equation Rock Mechanics for Resources, Energy and Environment Kwas´niewski & ydz ba (eds) © 2013 Taylor & Francis Group, London, ISBN 978-1-138-00080-3 Index of time-dependency for rock and its...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-002
... strain rate Abstract Several remarkable features of the mechanical behavior of salt caverns are presented. How these features can be explained by laboratory experiments and micro-mechanical investigations is discussed. Other aspects of the mechanical behavior of salt (slow strain rates, humidity...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-118
... rates of loading corresponding to variable energy levels. Compared to the static uniaxial strength, the dynamic strength of the rock was found to be much higher. The dynamic strength clearly increases with the strain rate of the loading but decreases with the duration of load application. The same...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-032
... mechanical processes fracture of rock and grain slips were identified as damage and plastic dissipation. These micro mechanical failure processes and related energy changes were presented for various strain rate loading conditions. 1 Damage and Plastic Dissipation as a Micro and Macro Mechanical Processes...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-067
... viscous element Reservoir Characterization constitutive equation application equation strain rate tunnel deformation new time-dependent constitutive model built-in fish language viscoelastic burger model Rock Mechanics for Resources, Energy and Environment Kwas´niewski & ydz ba (eds) ©...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-072
... the potential for delayed failure around the under excavation. Strain rates increase significantly above this stress level and will eventually lead to the short term failure of the rock. Numerical modeling was employed to delineate zones of states of stress around underground longwall coal panels at depth...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-102
... structural geology energy parameter creep compression stress level Upstream Oil & Gas activation energy stress power parameter strain rate equation Reservoir Characterization Engineering eurock 2012 creep parameter compression creep test impression creep test deformation...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-182
... gravina calcarenite Artificial Intelligence strength calcarenite Reservoir Characterization Lagioia elastic domain chalk structural geology transition specimen granite soft rock Nova plastic strain stress path destructuration strain rate evolution degradation foundation geomaterial...

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