Results 261 to 270 of about 1,771,167 (311)
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Study on Rock Strength Characteristic by Point Load Test
Applied Mechanics and Materials, 2014Test point load test requires relatively small load, its instrument is portable, it can be easily applied to on-site testing,which may pave the way for the development of the fieldstrength of rock mechanics test, widely promoted in engineering construction, has a large space for development.
Rui Hong Wang +3 more
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The Five Point Loading Shear Stiffness Test
The Aeronautical Journal, 1968Howard suggested that the shear stiffness of a beam in bending could be more expeditiously determined by using the five point loading system.Grayley reviewed the accuracy and speed of various methods of finding the shear stiffness of sandwich beams and showed that five point loading compared favourably on all counts with three point loading, four point
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The Point Load Test for the Tensile Strength of Rock
Geotechnical Testing Journal, 1980Abstract The theoretical background is presented for the point load test for determining the tensile strength of rock materials. Theoretical predictions of the dependence of fracture force on sample shape (in this case, spheres and cylinders) are shown to agree quite well with experimental data for Plexiglas® and rock materials.
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The point-load strength test for concrete cores
Magazine of Concrete Research, 1980Synopsis The point-load test, commonly used in geotechnical practice, is evaluated for application in concrete testing. The method uses portable equipment to test concrete cores which require no further preparation after removal from the structure.
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Estimation of strength anisotropy using the point-load test
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1983Abstract As most rocks are of an anisotropic nature, the measurement of the ratio between the maximum and minimum strength, i.e. the strength anisotropy, is of general interest. To measure the strength anisotropy by the uniaxial compression test, core specimens drilled in different directions are needed.
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RHRPMPOLS01 Point of Load: Qualification & Radiation Tests
2019 European Space Power Conference (ESPC), 2019This paper provides a detailed overview of the qualification activities including the radiation tests (both TID and SEE) of the RHRPMPOL01 IC device, a radiation hardened 7A synchronous step-down monolithic switching regulator with high precision internal voltage reference and integrated power MOSFETs for synchronous conversion.
Salvatore Pappalardo +5 more
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The Five-Point Loading Shear Stiffness Test
The Journal of the Royal Aeronautical Society, 1962The shear stiffness of a beam in bending is commonly determined by measuring the central deflection δ in a three-point loading test for a range of values of the span L under a constant central load. The value of bending stiffness, EI, and shear stiffness, GA, can then be obtained by plotting δ/L against L2 and drawing the best straight line through the
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A dynamic point-load test for quantifying rock dynamic strength parameters
Review of Scientific Instruments, 2017The point-load test (PLT) has been widely used in the field and in the laboratory to estimate the strength of rock materials. The PLT is easy and quick to perform and it is suitable for samples with irregular shapes and therefore has found wide applications.
Changyi, Yu +3 more
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Accelerating point-of-care HCV viral load testing
The Lancet Gastroenterology & Hepatology, 2023Weiming, Tang +2 more
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Point load testing for classification of porous effusive rocks
2013The choice of the ratio K between the uniaxial compression strength (σf) and the size-corrected point load strength (IS,50) for the estimate of σffrom point load tests can have significant consequences on design issues.
TOMMASI, PAOLO, ROTONDA, Tatiana
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