|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Cracks coalescence mechanism and cracks propagation paths in rock-like specimens containing pre-existing random cracks under compression显示文摘The mechanism of cracks propagation and cracks coalescence due to compressive loading of the brittle substances containing pre-existing cracks(flaws)was modeled experimentally using specially made rock-like specimens from Portland Pozzolana Cement(PPC).The breakage process of the specimens was studied by inserting single and double flaws with different inclination angles at the center and applying uniaxial compressive stress at both ends of the specimen.The first crack was oriented at 50° from the horizontal direction and kept constant throughout the analysis while the orientation of the second crack was changed.It is experimentally observed that the wing cracks are produced at the first stage of loading and start their propagation toward the direction of uniaxial compressive loading.The secondary cracks may also be produced in form of quasi-coplanar and/or oblique cracks in a stable manner.The secondary cracks may eventually continue their propagation in the direction of maximum principle stress.These experimental works were also simulated numerically by a modified higher order displacement discontinuity method and the cracks propagation and cracks coalescence were studied based on Mode I and Mode II stress intensity factors(SIFs).It is concluded that the wing cracks initiation stresses for the specimens change from 11.3 to 14.1 MPa in the case of numerical simulations and from 7.3 to 13.8 MPa in the case of experimental works.It is observed that cracks coalescence stresses change from 21.8 to 25.3 MPa and from 19.5 to 21.8 MPa in the numerical and experimental analyses,respectively.Comparing some of the numerical and experimental results with those recently cited in the literature validates the results obtained by the proposed study.Finally,a numerical simulation was accomplished to study the effect of confining pressure on the crack propagation process,showing that the SIFs increase and the crack initiation angles change in this case. | Hadi Haeri Kourosh Shahriar Mohammad Fatehi Marji Parviz Moarefvand | 2014 | Journal of Central South University2014，21，6： | 16 |
| 2 | Experimental and numerical study of crack propagation and coalescence in pre-cracked rock-like disks显示文摘 | Hadi Haeri Kourosh Shahriar Mohammad Fatehi Marji Parviz Moarefvand | 2014 | International Journal of Rock Mechanics and Mining Sciences2014，，： | 2 |
| 3 | Fracture analyses of different pre-holed concrete specimens under compression显示文摘Crack propagation processes in specially prepared concrete discs and rectangular specimens containing a single cylindrical hole or multiple holes of varying diameters have been studied both experimentally and numerically.In this research, the cracks coalescence paths in Brazilian disc and rectangular specimens made from rock-like material containing multi-holes are investigated. These concrete specimens are specially prepared from an appropriate mixture of Portland Pozzolana Cement(PPC), fine sands, and water.The pre-holed Brazilian discs and rectangular specimens are experimentally tested under compression. The breakage load in the ring type disc specimens containing an axial hole with varying diameters is measured and the distribution of the induced lateral stress is obtained. The mechanism of cracks propagation in the wall of the ring type specimens is also studied. In the case of multi-hole Brazilian disc and rectangular specimens, the cracks propagation and cracks coalescence are also investigated. These experiments are numerically modeled by a modified higher order displacement discontinuity method. It has been shown that the corresponding experimental and numerical results are in good agreement with each other. The results presented in this research validate the accuracy and applicability of these crack analyses procedures. | Hadi Haeri Alireza Khaloo Mohammad Fatehi Marji | 2015 | Acta Mechanica Sinica2015，31，6： | 2 |
| 4 | Experimental and Numerical Study of Shear Fracture in Brittle Materials with Interference of Initial Double Cracks显示文摘A simultaneous experimental and numerical study of shear fracture of concrete-like materials is carried out using Brazilian disc specimens with initial double edge cracks and fourpoint bending beam specimens with double edge-notches.The interference effects of two cracks/notches are investigated through varied ligament angles and crack lengths.It is shown that shear fracturing paths change remarkably with the initial ligament angles and crack lengths.The cracked specimens are numerically simulated by an indirect boundary element method.A comparison between the numerical results and the experimental ones shows good agreement. | Hadi Haeri Vahab Sarfarazi Mohammad Fatehi Marji Ahmadreza Hedayat Zheming Zhu | 2016 | Acta Mechanica Solida Sinica2016，29，5： | 2 |
| 5 | Effect of Satureja khuzestanica essential oil on male rat fertility显示文摘 | Sulmaz Haeri Bagher Minaie Gholamreza Amin Shekoufeh Nikfar Reza Khorasani Hadi Esmaily Alinazar Salehnia Mohammad Abdollahi | 2006 | Fitoterapia2006，，7： | 2 |
| 6 | Implementa- tion of MPC as an AQM controller显示文摘 | Marami Bahram Haeri Mohammad | 2009 | Computer Communications2009，3，2： | 1 |
| 7 | Impulsive synchronization of Chen' s hyperchaotic systems 显示文摘 | Mohammad Haeri Mahsa Dehghani | 2006 | Physics i2006，356，： | 1 |
| 8 | Impulsive synchronization of different hyperchaotic systems显示文摘 | Mohammad Haeri Mahsa Dehghani | 2008 | Chaos2008，38，： | 1 |
| 9 | Robust stability of impulsive synchronization in hyperchaotic systems显示文摘 | Mohammad Haeri Mahsa Dehghani | 2009 | Communications in Nonlinear Science and Numerical Simulation2009，14，3： | 1 |
| 10 | An optimization algorithm based on chaotic behavior and fractal nature显示文摘 | Mohammad Saleh Tavazoei Mohammad Haeri | 2007 | Journal of Computational and Applied Mathematics2007，206，2： | 1 |
| 11 | Evaluation of behaviors of earth and rockfill dams during construction and initial impounding using instrumentation data and numerical modeling显示文摘In this study,the behavior of Gavoshan dam was evaluated during construction and the first impounding.A two-dimensional(2D) numerical analysis was conducted based on a finite difference method on the largest cross-section of the dam using the results of instrument measurements and back analysis.These evaluations will be completed in the case that back analysis is carried out in order to control the degree of the accuracy and the level of confidence of the measured behavior since each of the measurements could be controlled by comparing it to the result obtained from the numerical model.Following that,by comparing the results of the numerical analysis with the measured values,it is indicated that there is a proper consistency between these two values.Moreover,it was observed that the dam performance was suitable regarding the induced pore water pressure,the pore water pressure ratio r_u,settlement,induced stresses,arching degree,and hydraulic fracturing probability during the construction and initial impounding periods.The results demonstrated that the maximum settlement of the core was 238 cm at the end of construction.In the following 6 years after construction(initial impounding and exploitation period),the accumulative settlement of the dam was 270 cm.It is clear that 88% of the total settlement of the dam took place during dam construction.The reason is that the clay core was smashed in the wet side,i.e.the optimum moisture content.Whereas the average curving ratio was 0.64 during dam construction; at the end of the initial impounding,the maximum amount of curving ratio in the upstream was 0.81,and the minimum(critical) amount in the downstream was 0.52.It was also concluded that this dam is safe in comparison with the behaviors of other similar dams in the world. | Mohammad Rashidi S. Mohsen Haeri | 2017 | Journal of Rock Mechanics and Geotechnical Engineering2017，9，4： | 1 |
| 12 | Synchronization of uncertain chaotic systems using active sliding mode control显示文摘 | Mohammad Haeri Mohammad Saleh Tavazoei Majid Reza Naseh | 2007 | Chaos Solitons and Fractals2007，3，： | 1 |
| 13 | An optimiza- tion algorithm based on chaotic behaviour and fractal nature 显示文摘 | Tavazoei Mohammad Saleh Mohammad Haeri | 2007 | Journal of Computational and Applied Mathematics2007，206，2： | 1 |
| 14 | Experimental and numerical study of crack propagation and coalescence in pre-cracked rock-like disks显示文摘 | Haeri Hadi Shahriar Kourosh Marji Mohammad Fatehi | 2014 | International Journal of Rock Mechanics and Mining Sciences2014，67，4： | 1 |
| 15 | Impulsive synchronization of different hyperchaotic(chaotic)systems显示文摘 | HAERI MOHAMMAD DEHGHANI MAHSA | 2002 | Chaos Solitons and Fractals2002，38，1： | 1 |
| 16 | Synchronization of chaotic fractional-order systems via active sliding mode controller显示文摘 | Mohammad Saleh Tavazoei Mohammad Haeri | 2007 | Physica A: Statistical Mechanics and its Applications2007，，1： | 1 |
| 17 | A note on the stability of fractional order systems显示文摘 | Mohammad Saleh Tavazoei Mohammad Haeri | 2008 | Mathematics and Computers in Simulation2008，，5： | 1 |
| 18 | Experimental and numerical study of crack propagation and coalescence in pre-cracked rock-like disks显示文摘 | Hadi Haeri Kourosh Shahriar Mohammad Fatehi Marji | 2014 | International Journal of Rock Mechanics and Mining Sciences2014，67，4： | 1 |
| 19 | On robust stability of linear time invariant fractional order systems with real parametric uncertainties显示文摘 | KAMRAN Akbari Moornani MOHAMMAD Haeri | 2009 | ISA Transactions2009，48，： | 1 |
| 20 | Characteristic Ratio Assignment in Fractional Order Systems 显示文摘 | Mohammad Tabatabaei Mohammad Haeri | 2010 | ISA Transactions2010，49，： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员