Undrained high-pressure and high strain-rate response of dry sand under triaxial loading

Martin, Brad; Kabir, Md. Enamul; Chen, W.

doi:10.1016/j.ijimpeng.2012.10.008

Cited by 54 publications

(22 citation statements)

References 20 publications

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“…The majority of experiments performed on the triaxial compression Kolsky bar have been specimens with about the same diameter as the incident and transmission bars [10]. To seal these specimens, a piece of heat shrink tubing would be heated and shrunk to fit securely over the length of the specimen and platens.…”

Section: Methodsmentioning

confidence: 99%

“…For the hydrostatic portion of the experiment, a linear variable differential transformer (LVDT) is attached to the incident and transmission bars just outside the radial chamber to measure the relative motion of the bars between these two points. The motion between these two attachment points subtracted by the elastic deformation of the bars inside the radial chamber gives the relative motion between the bar ends in contact with the specimen [10]. A datacollecting oscilloscope is set to collect data continuously.…”

Section: Methodsmentioning

confidence: 99%

“…A dynamic axial stress wave loading is then applied to the specimen by the Kolsky bar. The method has been employed to explore the dynamic triaxial behavior of sand [10] and rock [11]. In this paper, this dynamic triaxial experimental setup is used to characterize the dynamic triaxial response of a borosilicate and soda-lime glass.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Response of Borosilicate and Soda-Lime Glass Under Dynamic Triaxial Compression

Chojnacki

Chen

2016

J. dynamic behavior mater.

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Dynamic triaxial compression experiments were performed on borosilicate and soda-lime glass using a triaxial compression Kolsky bar that has two pressure chambers, one enclosing the specimen and the other enclosing the end of the transmission bar. A specimen is pre-stressed hydrostatically before being loaded by a dynamic axial stress wave. Specimen axial stress and strain are determined at high strain rates under a range of hydrostatic pressures. Borosilicate glass was subjected to pressures of 25, 50, and 100 MPa at a strain rate of 1500 s -1 , and soda-lime glass was subjected to 25, 50, and 75 MPa at 1100 s -1 . Dynamic results were compared to high-rate unconfined experiments, as well as low-rate confined experiments. It was observed that confined glass strength did not show clear strain-rate dependency. But confining pressure increased the glass strength.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Mechanical Response of Borosilicate and Soda-Lime Glass Under Dynamic Triaxial Compression

Chojnacki

Chen

2016

J. dynamic behavior mater.

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“…Under quasi-static loading, failure mechanisms were found to include: single abrasion fracture, multiple abrasion fractures, major splitting of a grain into two or more particles, breakage of subparticles and pulverization of grains into many small pieces [36]. Under dynamic loading, grain failure in sand was also observed in post-mortem analysis [37,38]. However, the dynamic failure process was never observed.…”

Section: (A) Sand Particle Collisionmentioning

confidence: 99%

In situ damage assessment using synchrotron X-rays in materials loaded by a Hopkinson bar

Chen

Hudspeth

Claus

et al. 2014

Phil. Trans. R. Soc. A.

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Split Hopkinson or Kolsky bars are common high-rate characterization tools for dynamic mechanical behaviour of materials. Stress–strain responses averaged over specimen volume are obtained as a function of strain rate. Specimen deformation histories can be monitored by high-speed imaging on the surface. It has not been possible to track the damage initiation and evolution during the dynamic deformation inside specimens except for a few transparent materials. In this study, we integrated Hopkinson compression/tension bars with high-speed X-ray imaging capabilities. The damage history in a dynamically deforming specimen was monitored in situ using synchrotron radiation via X-ray phase contrast imaging. The effectiveness of the novel union between these two powerful techniques, which opens a new angle for data acquisition in dynamic experiments, is demonstrated by a series of dynamic experiments on a variety of material systems, including particle interaction in granular materials, glass impact cracking, single crystal silicon tensile failure and ligament–bone junction damage.

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“…The methods employed by Christensen et al [15], Lindholm et al [16] and Martin et al [18] have been successfully used to perform dynamic conventional triaxial compression (CTC) tests, where hydrostatic loading is followed by a high-strain-rate deviatoric phase. The current work seeks to understand the shear behaviour of soils in explosive events, where a soil may deform uniaxially before developing significant lateral confinement, which is also influenced by the inertia of the surrounding soil.…”

Section: Introductionmentioning

confidence: 99%

Design of a split Hopkinson pressure bar with partial lateral confinement

Barr

Clarke

Rigby

et al. 2016

Meas. Sci. Technol.

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This paper presents the design of a modified split Hopkinson pressure bar (SHPB) where partial lateral confinement of the specimen is provided by the inertia of a fluid annulus contained in a long steel reservoir. In contrast to unconfined testing, or a constant cell pressure applied before axial loading, lateral restraint is permitted to develop throughout the axial loading: this enables the high-strain-rate shear behaviour of soils to be characterised under conditions which are more representative of buried explosive events. A pressure transducer located in the wall of the reservoir allows lateral stresses to be quantified, and a dispersion-correction technique is used to provide accurate measurements of axial stress and strain. Preliminary numerical modelling is utilised to inform the experimental design, and the capability of the apparatus is demonstrated with specimen results for a dry quartz sand.

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Undrained high-pressure and high strain-rate response of dry sand under triaxial loading

Cited by 54 publications

References 20 publications

Mechanical Response of Borosilicate and Soda-Lime Glass Under Dynamic Triaxial Compression

Mechanical Response of Borosilicate and Soda-Lime Glass Under Dynamic Triaxial Compression

In situ damage assessment using synchrotron X-rays in materials loaded by a Hopkinson bar

Design of a split Hopkinson pressure bar with partial lateral confinement

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