Response of Sand at Low Normal Stresses Using Gravity Shear Test

In order to discuss the friction resistance properties between pile and soil, three groups of shear laboratory tests of pile-soil interface are adopted among concrete-soil , steel-soil and plastic(HDPE)-soil, and each test applies six normal stresses. The result indicates that with the growth of normal stress, the shear strength of pile-soil are increased; under the same normal stress, there is little change in frontal parts of curve with shear stress and displacement, but the rest of curve have a striking change along with the increase of normal stress; when the normal stress is less, the shear stress of different interfaces have little change; when the normal stress is greater, it shows that the shear strength of HDPE-soil interface is the greatest.

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Study on the Mechanical Properties of Discontinuity under Shearing

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.261-263.900 ◽

2011 ◽

Vol 261-263 ◽

pp. 900-904

Author(s):

Qing Zhao Zhang ◽

Ming Rong Shen

Keyword(s):

Mechanical Properties ◽

Shear Stress ◽

Shear Strength ◽

Empirical Formula ◽

Shear Test ◽

Slope Angle ◽

Shear Stiffness ◽

Roughness Coefficient ◽

Normal Stresses ◽

Fundamental Research

This paper presents a fundamental research in the mechanical properties of the regular jagged discontinuity under various normal stresses in the shear test. The mechanical properties of the regular jagged discontinuity under shear stress and their principal regularities are described. The strength and roughness of discontinuity under shear stress are investigated by the analysis of the data obtained. The calculation of shear stiffness of discontinuity and an empirical formula between the slope angle and roughness coefficient of discontinuity are proposed. The changing regularity of the parameters of the shear strength of discontinuity under shear stress is investigated, and an empirical formula is established to evaluate the shear strength of discontinuity.

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Numerical Analysis of Impact Loading of Adhesive Joints

Advances in Materials Science and Engineering ◽

10.1155/2017/5941086 ◽

2017 ◽

Vol 2017 ◽

pp. 1-10 ◽

Cited By ~ 2

Author(s):

Andrzej Komorek ◽

Jan Godzimirski ◽

Agata Pietras

Keyword(s):

Impact Strength ◽

Shear Test ◽

Adhesive Joints ◽

Normal Stresses ◽

Principal Stresses ◽

Numerical Investigations ◽

Block Shear ◽

Bonded Joint ◽

Numerical Research ◽

Strength Of Adhesive Joints

Due to small repeatability of results of impact strength of adhesive joints, particularly those performed on different test machines, the authors were inspired to conduct experimental and numerical research in this field. The investigation used the Block Shear Test. The authors compared impact strength of samples which were loaded in a normative and nonnormative manner and also the dependence in impact strength with regard to the distance between the impactor’s edge and the surface of the bonded joint. The numerical calculations were carried out in the program Ansys, using the Explicit Dynamics module. The authors proposed a way of modelling the impactor of the pendulum hammer. It was found that a change in the direction of applying the load to the sample and rotating the loaded sample piece in relation to the edge of the impactor results in a significant change in the Max Principal Stresses. Numerical investigations show that lower values of Max Principal Stresses occur in joints which are characterized by larger impact strength, determined experimentally. It was also noted that moving away the edge of the impactor from the surface of the adhesive joint increases normal stresses perpendicular to the surface of the joint.

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Effect of Different Stabilization Agent on Shear Behavior of Sand

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.e6629.018520 ◽

2020 ◽

Vol 8 (5) ◽

pp. 3822-3825

Keyword(s):

Shear Strength ◽

Environmental Effect ◽

Direct Shear Test ◽

Shear Test ◽

Friction Angle ◽

Powder Form ◽

Direct Shear ◽

Normal Stresses ◽

Failure Envelope ◽

Sand Particles

Stabilisation of soils is one of the area that catch interest of many research. Making soil more stable and ready to resist again more loading are the reasons behind the applications. Recently usage of by-product in soils gained a momentum due to the positive environmental effect in terms of removing waste. In this research, three different stabilsation samples were prepared. The stabilization materials effect on the shear strength of sand were compared. The samples were properly blended and checked for homogeneity. All of the mixes apart from sand, had 10% of either flyash or fibre. In order to investigate the effect, direct shear test was used and run in different normal stresses (i.e.50 kPa,100 kPa,150 kPa). After running the direct shear test, the peak values of shear at failure was recorded relevant to each sample and normal stresses. Then the failure envelope plotted for each trial and the results of cohesion and friction angle were compare. The results showed that powder form of material were more effective due to their bonding forces with sand particles.

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