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Статті в журналах з теми "Double- direct shear apparatus":
Pincus, HJ, DJ DeGroot, JT Germaine, and CC Ladd. "The Multidirectional Direct Simple Shear Apparatus." Geotechnical Testing Journal 16, no. 3 (1993): 283. http://dx.doi.org/10.1520/gtj10049j.
Hanzawa, Hideo, Nigel Nutt, Tom Lunne, Y. X. Tang, and Michael Long. "A Comparative Study Between the NGI Direct Simple Shear Apparatus and the Mikasa Direct Shear Apparatus." Soils and Foundations 47, no. 1 (February 2007): 47–58. http://dx.doi.org/10.3208/sandf.47.47.
Lings, M. L., and M. S. Dietz. "An improved direct shear apparatus for sand." Géotechnique 54, no. 4 (May 2004): 245–56. http://dx.doi.org/10.1680/geot.2004.54.4.245.
Taslagyan, Karén A., Dave H. Chan, and Norbert R. Morgenstern. "A Direct Shear Apparatus With Vibrational Loading." Geotechnical Testing Journal 38, no. 1 (November 2014): 20140078. http://dx.doi.org/10.1520/gtj20140078.
Chao, Teng, Liu Zhijun, Wang Xuegang, and He Liping. "Analysis and Improvement of Oblique Shear Phenomenon of Direct Shear Apparatus." IOP Conference Series: Earth and Environmental Science 768, no. 1 (May 2021): 012090. http://dx.doi.org/10.1088/1755-1315/768/1/012090.
Pincus, HJ, and N. Takada. "Mikasa's Direct Shear Apparatus, Test Procedures and Results." Geotechnical Testing Journal 16, no. 3 (1993): 314. http://dx.doi.org/10.1520/gtj10052j.
Kondo, Hiroshi, Yoshiaki Noda, and Noboru Sugiyama. "Trial production of dynamic direct shear testing apparatus." Journal of Terramechanics 24, no. 1 (January 1987): 120. http://dx.doi.org/10.1016/0022-4898(87)90092-9.
Barla, G., M. Barla, and M. E. Martinotti. "Development of a New Direct Shear Testing Apparatus." Rock Mechanics and Rock Engineering 43, no. 1 (March 2009): 117–22. http://dx.doi.org/10.1007/s00603-009-0041-5.
Cui, Ying Hui, Jian Kun Liu, and Peng Lv. "Research of the Permafrost Dynamic Load Direct Shear Apparatus." Applied Mechanics and Materials 405-408 (September 2013): 454–59. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.454.
Oloo, S. Y., та D. G. Fredlund. "A method for determination of ϕb for statically compacted soils". Canadian Geotechnical Journal 33, № 2 (травень 1996): 272–80. http://dx.doi.org/10.1139/t96-006.
Дисертації з теми "Double- direct shear apparatus":
Tzortzopoulos, Georgios. "Controlling earthQuakes (CoQuake) in the laboratory using pertinent fault stimulating techniques." Electronic Thesis or Diss., Ecole centrale de Nantes, 2021. TEL.
Anthropogenic seismicity has been increased since the last decades due to the intense human activity for energy production. However, despite the fact that merely injection of fluids can induce/trigger earthquakes, in this thesis, we show that the strategic interplay between fluid extractions and injections can control such seismic events and eventually prevent them. More specifically, a novel mathematical framework of robust earthquake control is built which in turn is exploited in numerical simulations of strike-slip faults and gas reservoirs, as well as in new laboratory experiments of decimetric scale. First, the key parameters which constitute a conventional earthquake mitigation strategy are identified. Surrogate experiments on absorbent porous paper show that without the precise knowledge of the fault properties, fluid injections risk to nucleate faster a large seismic event. In order to tackle such uncertainties, rigorous mathematical tools are developed using modern control theory. These tools require minimal information of fault’s properties and frictional characteristics to assure robustness. Numerical simulations on strike-slip faults verify that earthquake prevention is possible, even in the presence of diffusion processes and the absence of sufficient measurements both in time and space. Going a step further, the developed control techniques can also be applied in large gas reservoirs, where the desired gas production can be achieved assuring acceptable seismicity levels. Finally, during this thesis, a novel triplet apparatus of decimetric scale has been designed, constructed and calibrated accordingly. Pressure control can be achieved, in this machine, in real-time, through a fast response electro-pneumatic pressure regulator. As a proof of concept, the developed controller is plugged in this apparatus and by using sand-based 3D-printed specimens (to promote experimental repeatability), we manage, for the first time, to prevent laboratory earthquakes and drive the system aseismically to an equilibrium point of lower energy
Dietz, Matthew S. "Developing an holistic understanding of interface friction using sand with direct shear apparatus." Electronic Thesis or Diss., University of Bristol, 2000. http://hdl.handle.net/1983/55218bdd-b641-4365-a921-5a7ca0d475bc.
DeGroot, Don Johan. "The multidirectional direct simple shear apparatus with application to design of offshore Arctic structures." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12834.
Ahmed, Imtiaz 1955. "Investigation of normalized behavior of resedimented Boston Blue Clay using Geonor direct simple shear apparatus." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/45698.
Cocheteau, Natacha. "Caractérisation et modélisation d'une adhérence moléculaire renforcée." Electronic Thesis or Diss., Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4700/document.
Direct bonding consists in joining two surfaces without the use of any adhesive or additional material. This process is used in several applications, particularly in terrestrial and spatial optics. Although a prototype passed with success spatial environment - where constraints involved are very different from those encountered on Earth - this technology requires a more detailed characterization and an improvement of the mechanical strength of bonded interfaces in order to validate the European Space Agency standards. To address this issue, mechanical tests (double shear tests, cleavage tests and wedge tests) and chemical analysis (wetting tests and XPS spectroscopy) were performed in order to study the influence of some process parameters (roughness, relative air humidity during room temperature bonding, the annealing temperature and time) on the mechanical strength and the bonding energy. These tests compared the two materials used: fused silica glass and Zerodur glass. As a result of these tests, optimal parameters doubling the mechanical strength were also obtained. In the same time, a phenomenological law relating the bonding energy to the previous parameters is developed as well as a macroscopic model to describe the adhesion intensity. Both models when coupled describe the normal behavior of the bonded interface depending on the process parameters. Then, the both laws are implemented in a finite elements model in order to simulate the crack propagation during the wedge test
Chern, Kuen-Huei, and 陳坤輝. "Establishment of the rock direct shear apparatus." 學位論文 ; thesis, 1996. http://ndltd.ncl.edu.tw/handle/66597230392163350801.
The purpose of research is to build a set of direct shear testing apparatus.The apparatus can be connected to MTS one- hundred-ton material testing machine and ELE pressure system to form a set of rock direct shear testing system.The good testing results can be obtained by MTS super servo- control and data- acquisition ability. A series of direct shear tests were performed to understand the mechanical behavior of intact rock marble,intact sepentinite, intact sandstone and jointed marble in the study.The shear strength parameters(c , φ),shear stress vs. shear displacement, normal displacement vs. shear displacement,normal stress vs. normal displacement curves were analyzed.The effect of temperature, anisotropy,jointed properties were also investigated, and some curve fitting equation were suggested.
Wang, Bor Wen, and 王博文. "Modifications of a cylindrical Direct Shear Apparatus and the Investigation of the Direct Shear Characteristics of Geotextiles." 學位論文 ; thesis, 1996. http://ndltd.ncl.edu.tw/handle/11046098721804782119.
The objective of the study is to modify a previous developed cylindrical direct shear apparatus for geosynthetics in order to evaluate the effect of necking phenomena on friction behavior of soil/geotextile during direct shear test. The use of cylindrical geometry for the apparatus has the intention of eliminating the necking deformation of geotextile test sample dueto longitudinal extension during direct shear test. A series of direct shear tests between various types of geotextiles and a white quartz sand were performed using the modified apparatus and a traditional large scale direct shear apparatus. The tested geotextiles included a woven fabric, a non-woven needle-punched geotextile, and a nonwoven heated bonded geotextile. A wide range of wide width tensile tests with different test speeds were conducted to evaluate the strength of the geotextiles. Based on the results of tensile tests, it is recommended that theuse of 5 mm/min. test speed for nonwoven wide width tensile test can significant minimize speed effect. However, the use of 1 mm/min. test speed rate for wide width tensile test of woven fabric is recommended. Based on the results obtained from the traditional large scale directshear tests between geotextiles and quartz sand, the use of maximum displacement rate of 1 mm/min. for soil/geotextile direct shear test is recommended. Theresults of direct shear tests indicated that the increase of water content of granular soils would reduce the friction resistance at soil/geotextile interface. The increase of water content of the quartz sand from dry condition to saturated condition would reduce the friction angle of soil/geotextile of 2 to 8 degrees for the conditions of tested. The effect of water content of soil on friction resistance of soil/geotextile direct shear test is more significant for the traditional large scale direct shear device than that of cylindrical direct shear apparatus. The results of the tests also shown that contact efficiencies of friction angle of dry loose sand/geotextiles are about 0.75 and 0.85 for woven fabric and nonwoven geotextiles, respectively. The contact efficiency of wet loose sand/geotextiles is about 0.70. The typical contact efficiencies of fri-ction angle of wet dense sand/geotextiles are about 0.815 and 0.95 for woven fabric and nonwoven geotextiles, respectively. Due to the presence of longit-udinal and hoop tensile stresses on cylindrical test sample, the friction resis-tance at soil/geotextile interface of cylindrical direct shear test sample is less than that presence on the geotextile sample for traditional large scale direct shear test. However, the reasons to cause the difference of test resultsbetween traditional and cylindrical direct shear apparatuses required further investigation.
Tseng, Hsiao-Chian, and 曾孝欽. "Development of a Multi-Purpose Shear Test System for Soft Rocks-Direct shear and Simple Shear Apparatus." 學位論文 ; thesis, 2003. http://ndltd.ncl.edu.tw/handle/11754689634744927071.
Development of a Multi-Purpose Shear Test System for Soft Rocks - Direct Shear and Simple Shear Apparatus Student: Hsiao-Chian Tseng Advisor： Dr. Jyh-Jong Liao Dr. Yii-Wen Pan Department of Civil Engineering National Chiao Tung University Abstract Due to the low strength and high deformability of poorly cemented sedimentary rocks, the conventional soil or rock mechanics test equipments are not suitable for determining the mechanical properties of those rocks. In order to propose reasonable engineering approaches in the soft rock area, the mechanical behavior of the rocks has to be investigated in details. To study the mechanical behavior of soft rocks, we need to develop a test system, which is appropriate for testing soft rocks. The geotechnical group, NCTU, aims to develop a multi-purpose shear test system for soft rocks. The system can perform direct shear test, simple shear tests, torsional shear tests, and triaxial tests. This thesis has designed and built a servo-controlled shear apparatus including direct shear test and simple shear test apparatus. The maximum normal and shear capacity of the system are 20 tons and 10 tons, respectively. The equipment was designed to conduct direct shear and simple shear tests under various conditions including constant normal force, constant normal displacement, and constant stiffness, especially for soft rock specimen. A series of experiments were carried out to verify the design objectives. It was confirmed the designed equipment could be operated according to the designed purposes. Keywords : soft rock, direct shear, simple shear, multi-purpose shear test system.
Lin, Win, and 林文屹. "Development of High Speed Large Direct Shear Device with Double Shear Planes." 學位論文 ; thesis, 2005. http://ndltd.ncl.edu.tw/handle/27489523148602049321.
The major superiority for a direct shear test device is to determine shear strength for a known planar failure surface. The feature for a traditional small direct shear test device is that samples obtained directly from drilling cores can be utilized. However, since the size of a sample is small enough, the effects for the structures on the failure plane formed during deposition can hardly be included in the test result. Also, during transferring horizontal shear force via the upper and the lower shear boxes, additional moment can be induced such that one end of the upper shear box will be lifted upward. A gap between the upper and the lower shear boxes is then clearly shown. Thereafter, lateral earth pressure near the gap is released thoroughly and some of the sample is forced to flow out through the gap. Such test conditions are seriously deviated from the theoretical ones. For improving the above-mentioned defects for the traditional small direct shear test, the authors of this paper develop a high speed large direct shear test device with double shear planes. The new device can not only take the effects of structure on the sliding plane, but also has the capability to determine the shear strength for a plane sliding quickly during the occurrence of a large earthquake.
Chiang, Chen-Li, and 江呈立. "Improvement＆Practial Applications of High Speed Large Direct Shear Device with Double Shear Planes." 學位論文 ; thesis, 2006. http://ndltd.ncl.edu.tw/handle/51253510594983378897.
A large direct shear test device with double shear planes was first developed in Feng-Chia University in 2005. It was proved that there is a tendency for the obtained results to be better than those obtained from using traditional direct shear test device with single shear plane. However, it was found in the developing process that the normal forces, acting on both the upper and the lower shear planes by applying downward vertical force only from the top side of the specimen, actually cannot transmit totally from the upper shear plane to the lower one. To allow the normal forces acting on both the upper and lower shear planes to be equal, a new system for applying forces was redesigned. Then, the new test device accompany with a traditional large direct shear test device were utilized to perform direct shear tests for four different types of sands such that special functions and features for the newly developed device can be studied. Results from this thesis reveal that (1) the new device with a system that can apply forces simultaneously from both top and bottom sides of a specimen to its upper and lower shear planes has the tendency to provide reasonable test results; (2) as compared with the single-shear-plane direct shear test device, the double-shear-plane one can provide better test results; (3) it was indicated by the test results from different types of sands that when shear velocities are in the range of slow, the resulting shear strength is increased with the increase in shear velocity, however, when shear velocities are increased from the range of slow to that of fast, the resulting shear strength is decreased with the increase in shear velocity; (4) a smaller increment of the coefficient of lateral earth pressure is obtained for the middle shear box as compared with those obtained from the upper and lower ones; such results directly indicate the complexity of stress distributions in the direct shear test specimen.
Частини книг з теми "Double- direct shear apparatus":
Okawara, Masafumi, Toshiyuki Mitachi, and Makoto Tanada. "Development of an automatic cyclic direct shear test apparatus for landslide slope stability analysis." In Slope Stability Engineering, 715–19. London: Routledge, 2021. http://dx.doi.org/10.1201/9780203739600-10.
"direct double-shear(ing) ring apparatus." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 382. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_42187.
"(torsion-)ring apparatus for direct single shear." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 1412. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_201940.
Yamamoto, H., K. Morichi, H. Matsuoka, Y. Tanaka, and D. Sun. "Frictional behaviour between clay and steel by direct shear type apparatus." In Deformation Characteristics of Geomaterials / Comportement Des Sols Et Des Roches Tendres. Taylor & Francis, 2003. http://dx.doi.org/10.1201/noe9058096043.ch30.
Mirzaii, A., S. Yasrebi, and E. Hefzi. "A new unsaturated direct shear apparatus for measuring shear strength of unsaturated soils Part 2." In Unsaturated Soils, 309–15. CRC Press, 2010. http://dx.doi.org/10.1201/b10526-40.
Hefzi, E., S. Yasrebi, and A. Mirzaii. "A new unsaturated direct shear apparatus for measuring shear strength of unsaturated soils Part 1." In Unsaturated Soils, 665–70. CRC Press, 2010. http://dx.doi.org/10.1201/b10526-103.
Moradian, Z., C. Gravel, A. Fathi, G. Ballivy, P. Rivard, and M. Quirion. "Developing a high capacity direct shear apparatus for the large scale laboratory testing of rock joints." In Rock Mechanics for Resources, Energy and Environment, 315–20. CRC Press, 2013. http://dx.doi.org/10.1201/b15683-52.
Mayumi, T., T. Yamasaki, K. Kato, and A. M. K. B. Abeysinghe. "Measurement of the strength parameter on undisturbed slip surface by new Slip Surface Direct Shear box apparatus." In Landslides, 641–47. Routledge, 2018. http://dx.doi.org/10.1201/9780203749197-92.
Тези доповідей конференцій з теми "Double- direct shear apparatus":
L. Urai, J., R. Schmitz, W. van der Zee, and P. Vrolijk. "Experimental Investigation of Clay Smear Processes in a Geotechnical Direct Shear Apparatus." In First EAGE International Conference on Fault and Top Seals - What do we know and where do we go? European Association of Geoscientists & Engineers, 2003. http://dx.doi.org/10.3997/2214-4609.201405849.
Tasalloti, Ali, Gabriele Chiaro, Alessandro Palermo, and Laura Banasiak. "Effect of Rubber Crumbs Volumetric Content on the Shear Strength of Gravelly Soil in Direct Shear Apparatus." In Geo-Congress 2020. Reston, VA: American Society of Civil Engineers, 2020. http://dx.doi.org/10.1061/9780784482827.029.
Liu, Xiao, Erjuan Luo, Yingjie Duan, Chunming Xue, and Bo Liu. "Design and analysis of new direct shear apparatus based on parallel mechanism technology." In 2017 IEEE 2nd Information Technology, Networking, Electronic and Automation Control Conference (ITNEC). IEEE, 2017. http://dx.doi.org/10.1109/itnec.2017.8284919.
Amarasinghe, Ruslan S., Dharma Wijewickreme, and Hisham T. Eid. "Some Observations on Soil-Pipe Interface Shear Strength in Direct Shear Under Low Effective Normal Stresses and Large Displacements." In 2016 11th International Pipeline Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/ipc2016-64100.
Ali, Liaqat, Sarfraz Ali, and Ammar Maqbool. "Large Direct Shear Test Apparatus for In Situ Testing of Municipal Solid Waste Landfill Sites." In GeoHunan International Conference 2009. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41041(348)13.
Alam, Md Shah, Claude Daley, Bruce Colbourne, Greg Hermanski, Bob Gagnon, Steve Bruneau, Geoff Clarke, and Bruce Quinton. "Double Pendulum Dynamic Impact Test Set-up for Ice-grillage Collision." In SNAME 10th International Conference and Exhibition on Performance of Ships and Structures in Ice. SNAME, 2012. http://dx.doi.org/10.5957/icetech-2012-134.
Martel, Joseph, and Bradford A. Bruno. "Shear Stress Measurement in Microfluidic Systems: Liquid Crystal Technique." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68708.
Derksen, Jos. "Direct Simulations of Incipient Erosion of Solid Particle Beds due to Shear Flow." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-09002.
Gestring, Ingo, and Dieter Mewes. "Devolatilization of Molten Polymers During Multiphase Flow in a Double Screw Extruder." In ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/fedsm2002-31023.
Francke, Eric, Michelle K. Elfervig, Ajay Sood, Thomas D. Brown, Donald K. Bynum, and Albert J. Banes. "Fluid-Induced Shear Stress Stimulates Ca2+ Signaling in Human Tendon Epitenon Cells." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0401.
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