Evaluation of Relative Density and Shear Strength of Sands from CPT and DMT

The appropriate choice of shear strength of liquefied sands is an important component in seismic slope stability evaluation. Several factors affect the undrained steady-state strength (Sus) of sands. The steady-state strengths of 24 sandy soils were analyzed. It is shown that fines content, relative density, and friction angle play important roles affecting Sus. Fines content was found to be the major factor affecting Sus. This was verified experimentally for one sand. When the Sus. data for sands were grouped into (a) relatively clean sands (<12 percent fines), (b) silty sands (12 to 50 percent fines), and (c) silts or sandy silts (>50 percent fines), at the same relative density, relatively clean sands showed the highest Sus. Silts showed the lowest Sus. Silty sands showed intermediate strengths. Lower-bound Sus-relative density relationships were established for relatively clean sands and silty sands.

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Strength and Energy Absorption of Aluminium Foam under Quasi-Static Shear Loading

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.312.269 ◽

2006 ◽

Vol 312 ◽

pp. 269-274

Author(s):

W. Hou ◽

J. Shen ◽

Guo Xing Lu ◽

L.S. Ong

Keyword(s):

Shear Strength ◽

Total Energy ◽

Relative Density ◽

Energy Absorption ◽

Shear Force ◽

Shear Loading ◽

Maximum Strength ◽

Ultimate Shear Strength ◽

Fixed End ◽

Static Shear

Experiments were carried out to examine the behaviour of aluminium foams under quasistatic shear loading. Special fixtures were designed to clamp the both ends of a beam-like specimen while the load was applied via a punch, which led to failure by shearing along the clearance near the fixed end. Specimens were made of CYMAT foams with two nominal relative densities (12% and 17%) and several values of width. This study focuses on the maximum strength under shear and the essential energy in fracture. It has been found that the ultimate shear force increases linearly with the width of the beam, so does the total energy absorbed. Two empirical formulae have been obtained which relates to the relative density, respectively, the ultimate shear strength and energy absorbed in shearing.

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The Preparation of Aluminum-Bronze/Steel Duplex Metal by Loose Sintering

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.311-313.160 ◽

2011 ◽

Vol 311-313 ◽

pp. 160-164 ◽

Cited By ~ 3

Author(s):

Qi Yang ◽

Shun Huang ◽

Jin Tian Chen ◽

Guang Zhi He ◽

Guo Zheng Yan

Keyword(s):

Shear Strength ◽

Bond Strength ◽

Relative Density ◽

Density Measurement ◽

Aluminum Bronze ◽

Shear Strength Test ◽

Bronze Powder ◽

Sintered Aluminum ◽

Compression Shear Strength ◽

Electronic Microscope

Aluminum-bronze/steel duplex metal has been prepared by aluminum-bronze powder whose compact oxide film was removed by dilute HCl solution before sintering. Scanning electronic microscope (SEM), energy spectrum analysis (EDS), density measurement and compression shear strength test were used to investigate the structure, composition, relative density and bond strength of aluminum-bronze/steel duplex metal. The results show: liquid phase could wet the aluminum-bronze powder washed by acid, improve sintering activity of the powder and increase bond strength of aluminum-bronze/steel interface. The relative density of sintered aluminum-bronze is 99.6%, and shear strength of aluminum-bronze/steel interface is 132.6MPa.

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