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| 1 | Dolomite fracture modeling using the Johnson-Holmquist concrete material model:Parameter determination and validation显示文摘In this paper,the Johnson-Holmquist concrete(JHC)constitutive model is adopted for modeling and simulating the fracture of dolomite.A detailed step-by-step procedure for determining all required parameters,based on a series of experiments under quasi-static and dynamic regimes,is proposed.Strain rate coefficients,failure surfaces,equations of state and damage/failure constants are acquired based on the experimental data and finite element analyses.The JHC model with the obtained parameters for dolomite is subsequently validated using quasi-static uniaxial and triaxial compression tests as well as dynamic split Hopkinson pressure bar(SHPB)tests.The influence of mesh size is also analyzed.It shows that the simulated fracture behavior and waveform data are in good agreement with the experimental data for all tests under both quasi-static and dynamic loading conditions.Future studies will implement the validated JHC model in small-and large-scale blasting simulations. | Michal Kucewicz Pawel Baranowski Jerzy Maachowski | 2021 | Journal of Rock Mechanics and Geotechnical Engineering2021，13，2： | 4 |
| 2 | Regional citrate anticoagulation for continuous haemodiafiltration in the postoperative period显示文摘 | Kucewicz E Zeglefl S Wojarski J | 2009 | Anestezjol Intens Ter2009，41，4： | 1 |
| 3 | Gamma oscillations precede interictal epileptiform spikes in the seizure onset zone 显示文摘 | Ren L Kucewicz MT Cimbalnik J | 2015 | Neurology2015，84，6： | 1 |
| 4 | Functional tissue pulsatility imaging of the brain during visual stimulation显示文摘 | KUCEWICZ JC BARBRINA DUNMIRE LEOTTA DF | 2007 | Ultrasound Med Biol2007，33，： | 1 |
| 5 | The TISS - 28 scoring system for assessment of cardiac surgical postoperative intensive care显示文摘 | Goj K Knapik P Kucewicz - Czech E | 2009 | Anestezjol Intens Ter2009，41，1： | 1 |
| 6 | Atypical and opportunistic pulmonary infections after cardiac surgery显示文摘 | Puzio J Kucewicz E Siola M | | 0，，： | 1 |
| 7 | Regional citrate anticoagulation for continuous haemodiafiltration in the postoperative period显示文摘 | Kucewicz E Zeglen S Wojarski J | 2009 | Anestezjol Intens Ter2009，41，： | 1 |
| 8 | The TISS - 28 scoring system for assessment of cardiac surgical postoperative intensive care 显示文摘 | Goj K Knapik P Kucewicz - Czech E | 2009 | Anestezjol Intens Ter2009，41，1： | 1 |
| 9 | Shock-induced fracture of dolomite rock in small-scale blast tests显示文摘This paper attempts to study dolomite failure using small-scale blast tests.The experimental setup consisted of a cylindrical specimen with a central borehole fitted with a detonation cord inside a copper pipe.The specimen was confined using lead material.During the test,acceleration histories were recorded using sensors placed on the lead confinement.The results showed that heterogeneity and initial cracks significantly influenced the observed failure and cracking patterns.The tests were numerically represented using the previously validated Johnson-HolmquistⅡ(JH-2)constitutive model.The properties of the detonation cord were first determined and verified in a special test with a lead specimen to compare the deformation in the test with that of numerical simulation.Then,the small-scale blast test was simulated,and the failure of the dolomite was compared with the test observations.Comparisons of acceleration histories,scabbing failure,and number of radial cracks and crack density confirmed the overall repeatability of the actual testing data.It is likely that the proposed model can be further used for numerical studies of blasting of dolomite rock. | Pawel Baranowski Michal Kucewicz Mateusz Pytlik Jerzy Matachowski | 2022 | Journal of Rock Mechanics and Geotechnical Engineering2022，14，6： | 0 |
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