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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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Point load tests and strength measurements for brittle spheres
International Journal of Rock Mechanics and Mining Sciences, 2009A multiaxial failure criterion for brittle materials is applied to a stress field analysis of a perfectly elastic sphere subjected to diametrically opposite normal forces that are uniformly distributed across small areas on the sphere's surface. Expressions are obtained for an intrinsic strength parameter of the material, as well as its unconfined ...
Russell, A.R., Muir Wood, David
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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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Point load testing to more effectively measure bedrock strength
Nature Reviews Earth & Environment, 2021Kristin Chilton describes the use of point load testing in measuring bedrock strength and its application to geomorphology.
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Numerical Simulation on Effect of Indenter Radius During Point Load Test
Journal of Shanghai Jiaotong University (Science), 2023Zhi Wang, Y. Ouyang, Qi Yang
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Bulletin of Engineering Geology and the Environment, 2022
Yi-guo Xue +4 more
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Yi-guo Xue +4 more
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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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A novel equation for calculating uniaxial compressive strength values using the point load test
Arabian Journal of Geosciences, 2022Veli Özçoban +2 more
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Analytic Solutions for Diametral Point Load Strength Tests
Journal of Engineering Mechanics, 1998This paper investigates the tensile stress distribution within a solid circular cylinder of diameter \iD and length 2\iL subjected to double diametral indentors or diametral point load strength test (PLST). The contact problem between the indentors and the cylinder is solved analytically, and exact solution for stress distribution is obtained through ...
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