shear test system Articles

  • An Automated Electropneumatic Control System for Direct Simple Shear Testing

    This paper describes the design and implementation of an automated electropneumatic control system for direct simple shear testing of cohesive soils. The hardware and software used to perform automated application of consolidation increments and for subsequent constant volume shear of soil specimens is described in detail. Two servo-control algorithms are used to conduct a test, one for ...


    By ASTM International

  • A Cyclic Undrained Simple Shear Testing Method for Soils

    An undrained simple shear testing method for soils using a torsional shear apparatus is described, in which a hollow cylindrical specimen is sheared under plane strain conditions without deforming and rotating all horizontal planes. In this testing method, the simple shear deformation mode is achieved only by several mechanical means without using an automated pressure control system. Typical ...


    By ASTM International

  • The Multidirectional Direct Simple Shear Apparatus

    The paper describes a new simple shear testing device, the multidirectional direct simple shear (MDSS) apparatus, for testing soil specimens under conditions that simulate, at the element level, the state of stress acting within the foundation soil of an offshore Arctic gravity structure. The MDSS uses a circular specimen that is consolidated under both a vertical effective stress (s'vc) and a ...


    By ASTM International

  • Automated Triaxial Testing of Soft Clays: An Upgraded Commercial System

    The paper evaluates the ability of a widely used automated commercial testing system to perform Ko consolidated-undrained triaxial compression and extension (CKoUC/E) tests on normally consolidated clay. The commercial system uses control software on a microcomputer to operate three digital pressure-volume controllers that control and measure the pore water pressure and volume, the radial stress, ...


    By ASTM International

  • Testing Validates Environmentally Friendly Hydraulic Fluids

    Operators seeking next-generation hydraulic fluids typically expect to find products with a low-impact environmental footprint that meets both current and future regulations without skimping on the high-performance requirements some systems need. As a possible solution, EnBio Industries offers its EnBio fluids, a polyalkylene glycol-based lubricant with five characteristics that ...


    By EnBio Industries

  • Instrumentation for Torsional Shear/Resonant Column Measurements Under Anisotropic Stresses

    Instrumentation for torsional shear/resonant column testing under anisotropic stresses has been developed. The test apparatus discussed is capable of torsional shear and resonant column testing with anisotropic states of stress applied to the soil specimen. Low-frequency torsional shear measurements are made using proximity probes to measure the angle of twist of the soil specimen. High-frequency ...


    By ASTM International

  • Settlement of Compacted Clay in a Cyclic Direct Simple Shear Device

    The results of 36 cyclic strain-controlled direct simple shear tests on a low-plasticity compacted clay are presented and analyzed. The tests were conducted in a Marshall Silver-type device, which utilizes the Norwegian Geotechnical Institute (NGI) type of short cylinder specimen confined in a wire-reinforced rubber membrane. Three degrees of compaction achieved by the modified compaction test ...


    By ASTM International

  • A Low-Compliance Bi-Directional Cyclic Simple Shear Apparatus

    A new simple shear apparatus is described which can apply bi-directional simple shear cyclic and monotonic loading. Cylindrical specimens are placed in a pressure chamber so that confining pressure and back pressure can be applied. Bi-directional shear loads are applied to the specimen´s base, which is mounted on a series of two horizontal rolling tables which can be independently loaded in two ...


    By ASTM International

  • A General Dynamic Model for the Resonant Column/Quasi-Static Torsional Shear Apparatus

    A new model is proposed that allows for more general boundary conditions at both the active and passive ends of resonant column apparatus, especially those incorporated within the resonant column/quasi-static torsional shear devices. The improved three-degree-of-freedom model can be used in order to obtain more accurate measurements of the dynamic properties of tested soils when the base and the ...


    By ASTM International

  • Performance of NSM–FRP RC beams in flexure and shear using locally developed CFRP rebars

    In the present study, an experimental investigation was carried out to evaluate the flexural and shear capacity of near surface mounted (NSM) reinforced concrete (RC) beams using carbon fibre reinforced polymer (CFRP) rebars. A total of 16 half scale beams were tested to study the flexural and shear responses of strengthened RC beams. The CFRP rebars were manufactured at structural testing centre ...


    By Inderscience Publishers

  • Anchorage systems for FRP strengthening of infill masonry structures

    An experimental research program consisting of 12 infill wall specimens was undertaken to investigate the effectiveness of several new and existing anchorage systems for fibre–reinforced polymer (FRP) strengthening of infill masonry walls. Specimens were loaded out–of–plane using an airbag to apply uniformly distributed pressure to the masonry. Test results indicate that the anchorage system had ...


    By Inderscience Publishers

  • Performance of NSM-FRP RC beams in flexure and shear using locally developed CFRP rebars

    In the present study, an experimental investigation was carried out to evaluate the flexural and shear capacity of near surface mounted (NSM) reinforced concrete (RC) beams using carbon fibre reinforced polymer (CFRP) rebars. A total of 16 half scale beams were tested to study the flexural and shear responses of strengthened RC beams. The CFRP rebars were manufactured at structural testing centre ...


    By Inderscience Publishers

  • Laboratory Measurement of Small Strain Shear Modulus Under K0 Conditions

    A new device to measure the small strain shear modulus (Gmax) under a no lateral strain condition has been developed. The techniques for measuring Gmax are discussed, with emphasis on bender element techniques. The performance of the bender elements are compared with results from simultaneous resonant column tests. An in-depth description of the lateral stress measurement system, the Gmax ...


    By ASTM International

  • Imaging and analysis of chip formation during orthogonal cutting of titanium alloy Ti-6Al-4V

    Orthogonal cutting of titanium alloy Ti-6Al-4V was investigated in a series of continuous and interrupted turning tests. Direct observation of the chip formation zone was achieved using a high speed imaging system with a long-distance microscope lens. Frame rates from 20,000 to 50,000 frames per second were used to record the chip formation cycle over a range cutting speeds from 4 to 150 m/min ...


    By Inderscience Publishers

  • Fouling and long-term durability of an integrated forward osmosis and membrane distillation system

    An integrated forward osmosis (FO) and membrane distillation (MD) system has great potential for sustainable wastewater reuse. However, the fouling and long-term durability of the system remains largely unknown. This study investigates the fouling behaviour and efficiency of cleaning procedures of FO and MD membranes used for treating domestic wastewater. Results showed that a significant ...


    By IWA Publishing

  • Model Testing Optimizes and Verifies Design of a 200-MGD Trench Wet Well for the Sugar Creek WWTP

    Charlotte-Mecklenburg Utilities (CMUD) and CDM are currently involved in the design of several treatment plant upgrades at the Sugar Creek wastewater treatment plant (WWTP) in Charlotte, North Carolina. Implementation of this project, which includes a 200-million-gallonper- day (mgd) screenings and influent pump station with dual self-cleaning trench-type wet wells, will provide CMUD with the ...

  • Imaging and analysis of chip formation during orthogonal cutting of titanium alloy

    Orthogonal cutting of titanium alloy Ti-6Al-4V was investigated in a series of continuous and interrupted turning tests. Direct observation of the chip formation zone was achieved using a high speed imaging system with a long-distance microscope lens. Frame rates from 20,000 to 50,000 frames per second were used to record the chip formation cycle over a range cutting speeds from 4 to 150 m/min ...


    By Inderscience Publishers

  • Micromechanisms of dynamic fracture in biopolyester

    A biopolymer is a naturally occurring polymeric substance formed from individual molecules in a biological system. Biopolymers can also be synthetic by manipulation of the individual molecules once obtained outside the biological system. In the present investigation, attempts are made to investigate the basic mechanisms of dynamic fracture in a polyester biopolymer. Izod impact tests of polyester ...


    By Inderscience Publishers

  • Microfiltration and Ultrafiltration Membrane Systems: Common Problems and How to Fix Them

    Microfiltration (MF) and Ultrafiltration (UF) are membrane-based filtering technologies that use thin layers of semipermeable material to separate out contaminating particles, such as organic material, bacteria, suspended solids, and other pollutants. In industries such and dairy, pharmaceutical, and chemical, the separated material may be a product they are recovering, and more facilities ...


    By SAMCO Technologies, Inc.

  • Idaho National Laboratory (INL) Advanced Test Reactor (ATR) - Case Study

    TRA-63 (TRA-605 Warm Waste Line) Failure of Underground 4-Inch Radioactive Warm Waste Pipe and Leakage Discovered During Waste Piping Replacement Construction Project Quick Facts: Pipe Material: Duriron Pipe Pipe Diameter: 4 inches Hole Size: ...


    By InduMar Products, Inc.

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