Results 21 to 30 of about 84,116 (263)
Numerical simulation of direct shear test of sand considering rotational impedance
Shuili Shuiyun Gongcheng Xuebao, 2021 A series of sand direct shear numerical simulation tests were performed using the discrete element method, so as to investigate the inherent relation of meso-mechanics between the particle’s rotation-resistant capacity and the interaction of sands and ...
WANG Zhuang +3 more
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A Direct Shear Apparatus for Rheological Soil Testing
Soils and Foundations, 1963 SYNOPSIS A direct shear apparatus for determining the rheological properties of clay soil in simple shear is described. Tests on a remolded Kaolin show that the distribution of strain within the specimen is nearly uniform. The apparatus will be applicable to compacted or undisturbed cohesive soils.
POELLOT, James H., YOSHIMI, Yoshiaki
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Characterization of peak shear strength of rough rock joints using limited displacement multi-stage direct shear (LDMDS) tests [PDF]
E3S Web of Conferences, 2019 Current standard direct shear test methods for rock joints do not account for damage to the specimens' asperity profiles; tests require shearing of a single specimen to large displacements under successive normal stresses (the multistage test), or the ...
MacLaughlin Mary +4 more
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An Apparatus for In Situ Direct Shear Tests on Snow
Experimental Techniques, 2016 The article presents a prototype of a new device for measuring the shear strength of snow specimens in situ. The resistance to sliding of a snow slab on a mountain slope is a key parameter in snow mechanics. The proposed apparatus acts as a sampler, to obtain a nearly undisturbed specimen, and as a shear box, similar to those used in the laboratory ...
BARBERO, Monica +3 more
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Application of in situ direct shear device to shear strength measurement of rockfill materials
Water Science and Engineering, 2009 A simplified in situ direct shear test (DST) was developed for measuring the shear strength of soils in fields. In this test, a latticed shearing frame replaces the upper half of the shear box used in the conventional direct shear box test.
Si-hong Liu
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Frontiers in Earth Science, 2023 The properties of loess in the Ili region of China are significantly affected by repeated cycles of rainfall and evaporation. It is thus essential to investigate the deterioration mechanism of loess subjected to the wet and dry cycles. This paper employs
Runsen Lai +5 more
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Interface shear characteristics of dredger fill and concrete using large size direct shear test
International Journal of Geo-Engineering, 2018 A large-size direct shear test was conducted to test the interface of dredger fill and concrete. The effect that concrete strength and the density of dredger fill have on the properties of interface is then analyzed.
Ping Yang +3 more
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A COMPARATIVE STUDY ON SHEAR STRENGTH OF MARINE CLAYS BY DIRECT SHEAR AND DIRECT SIMPLE SHEAR TESTS
Doboku Gakkai Ronbunshu, 1998 九州の有明粘土およびノルウェーの Drammen 粘土について, 三笠式一面せん断試験機とNGI型単純せん断試験機による一連の比較実験を行った. 実験は, 不撹乱試料をその有効土被り圧で再圧縮した後せん断に供するものと人工的に作成した過圧密粘土について実施した. その結果, 下記のような結論が得られた. 1) 一面せん断試験は単純せん断試験よりも高い剛性とせん断強度を与える, 2) この違いは主としてせん断機構と載荷速度の違いによるものと考えられ二つの要因に対する補正係数を導いた, 3) この係数を一面せん断強度に乗じた補正一面せん断強度は, 単純せん断強度と良い一致を示した, 4) しかし人工的に作成した過圧密粘土の試験結果についてはこの補正は適用できない.
Kiyoshi Tsuji, Yi-Xin Tang, Tom Lunne
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Degradation mechanism of the von Willebrand factor A2 domain by nattokinase
FEBS Letters, EarlyView.Nattokinase, a natto‐derived protease, exhibits potent antithrombotic effects. This study demonstrates that nattokinase directly cleaves the von Willebrand factor (vWF) A2 domain in vitro. Unlike the native regulator ADAMTS13, nattokinase degrades folded vWF independently of shear stress.
Ryuichi Hyakumoto +3 more
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Geofluids, 2021 In order to probe into one simplified method to predict the shear strength of Shaoxing unsaturated silty clay, the test method combining unsaturated soil consolidation instrument and conventional direct shear instrument is used to study the shear ...
Ruiqian Wu +5 more
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