Shear strength-suction relationship of compacted Ankara clay

2010 ◽  
Vol 49 (4) ◽  
pp. 400-404 ◽  
Author(s):  
Erdal Çokça ◽  
Hüseyin P. Tilgen
Keyword(s):  
Shear Strength ◽  
Ankara Clay ◽  
Relationship Of

Research on the Shear Strength and Microstructure Change Regulation of Cement-Mixed Soil under Erosion Environment

2011 ◽  
Vol 52-54 ◽  
pp. 1846-1854
Author(s):  
Lei Zhu ◽  
Hua Jie Zhang
Keyword(s):  
Shear Strength ◽  
Upward Trend ◽  
Microstructure Change ◽  
Regression Methods ◽  
Microstructural Parameters ◽  
Set Up ◽  
Relationship Of ◽  
The Relationship ◽  
Erosion Environment ◽  
Erosive Effect

In order to research the mechanical properties and microstructure change regulation of cement-mixed soil under erosion environment, several experiments are carried out in laboratory. The changes of shear strength of cement-mixed soil are recorded under different erosion environments and in different erosion periods. Their corresponding photomicrographs are also shot to reveal the damage on cement-mixed soil under erosion environment. The results indicate that the shear strength of cement-mixed soil in erosion solutions is worse than the strength by the natural curing in the corresponding period. As erosion time increases the strength of cement-mixed soil dipped in , and solutions keeps on downtrend, whereas the strength of that dipped in unpolluted water and solution presents upward trend. The erosive effects of cement-mixed soil are mainly caused by and , meantime has more prominent erosive effect on cement-mixed soil than . Accompanying with stadium increasing quantitative parameters of microstructures are all varying markedly and have certain regulation which testifies the notable relativity between the shear strength and microstructural parameters. Liner regression methods are set up to indicate the relationship of shear strength indexes and microstructural parameters in the erosion environment.

A Shear Strength Degradation Model for Anisotropic Conductive Adhesive Joints Under Hygrothermal Conditions

2013 ◽  
Vol 135 (4) ◽  
Author(s):  
Bo Tao ◽  
Guanghua Wu ◽  
Zhouping Yin ◽  
Youlun Xiong
Keyword(s):  
Shear Strength ◽  
Experimental Testing ◽  
Theoretical Models ◽  
Strength Degradation ◽  
Conductive Adhesive ◽  
Degradation Model ◽  
Anisotropic Conductive Adhesive ◽  
Degradation Data ◽  
Shear Strength Degradation ◽  
Relationship Of

Hygrothermal environments can degrade anisotropic conductive adhesive (ACA) joints by weakening the shear strength of adhesive interface. In this paper, the shear strength degradation model of ACA joints under hygrothermal conditions was formulated through experimental testing and theoretical modeling. The shear strength degradation data were obtained from different hygrothermal aging tests and the ACA moisture properties were characterized for the corresponding hygrothermal conditions. Theoretical models considering the hygrothermal factors of T (temperature), RH (relative humidity), and t (time), were used to fit the shear strength degradation data. It was found that the inverse exponential law was the best candidate model to predict the degradation data. The shear strength degradation model of ACA joints under hygrothermal conditions was proposed, where the relationship of the S (shear strength) and the hygrothermal factors (T, RH, and t) was expressed in an analytical model. The degradation model was validated by experiments, and the model predictions agreed well with the test results.

Study on the Relationship between Soil-Cement Parameters and Unconfined Compressive Strength

2011 ◽  
Vol 255-260 ◽  
pp. 4012-4016
Author(s):  
Jun Qing Ma ◽  
You Xi Wang
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Shear Strength ◽  
Unconfined Compressive Strength ◽  
Deformation Modulus ◽  
Soil Cement ◽  
Strength And Deformation ◽  
Cement Soil ◽  
Relationship Of ◽  
The Relationship

This paper studies relationship between soil-cement parameters and unconfined compressive strength. The research in tensile strength and deformation modulus of soil-cement is an important basis for soil-cement failure mechanism and intensity theory. They also impact cracks, deformation and durability of cement-soil structure. Shear strength and deformation of soil-cement is important to the destruction analysis and finite element calculations. Therefore it needs to study on tensile strength, shear strength and deformation modulus of soil-cement. Based on previous experiments, the relationship of tensile strength, shear strength, deformation modulus and unconfined compressive strength of soil-cement are quantitatively studied.

Bilateral Shear Strength of Rectangular Frame Column with Different Stirrup on Two Principal Axis

2010 ◽  
Vol 163-167 ◽  
pp. 1728-1731
Author(s):  
Chun Min Dong ◽  
Lian Jin ◽  
Sun Jia
Keyword(s):  
Shear Strength ◽  
Concrete Structure ◽  
Principal Axis ◽  
Reinforced Concrete Structure ◽  
Rectangular Frame ◽  
Truss Model ◽  
Principal Axes ◽  
Strength Formula ◽  
Relationship Of ◽  
The Relationship

To study bilateral shear strength of rectangular frame column (RFC) with different stirrup area on two principal axis, 12 rectangular frame columns including 5 columns without stirrup and 7 columns with stirrup were tested. The analytical results indicated that the relationship of shear strength between two principal axes of RFC without stirrup could be approximately described as ellipse, and stirrup stress on two principal axes is independent. The oblique shear strength is less than the resultant force calculated by unilateral shear strength formula offered by Code for Design of Reinforced Concrete Structure. The reason for this is shear strength contributed by concrete is considered iteratively on two axes. Based on truss model and the above conclusion, a reduced coefficient is introduced to calculate the bilateral shear strength offered by concrete and the axial force, and then a formula is proposed to calculate bilateral shear strength of RFC with different stirrup area on two principal axes. Comparison between the calculation and experimental results shows the formula is feasible and safe.

The effects of wettability, shear strength, and Weibull characteristics of fiber-reinforced poly(lactic acid) composites

2016 ◽  
Vol 36 (5) ◽  
pp. 489-497 ◽  
Author(s):  
John O. Akindoyo ◽  
Mohammad Dalour Hossen Beg ◽  
Suriati Ghazali ◽  
Muhammad Remanul Islam
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Lactic Acid ◽  
Flexural Modulus ◽  
Tensile Modulus ◽  
Fiber Surface ◽  
Poly Lactic Acid ◽  
Dimethyl Siloxane ◽  
Pull Out ◽  
Relationship Of

Abstract The wettability, interfacial shear strength (IFSS), and Weibull characteristics of oil palm empty fruit bunch (EFB) fibers were studied to evaluate the mechanical properties of EFB- and poly(lactic acid) (PLA)-based composites. The fiber surface was modified through ultrasound and poly(dimethyl siloxane) treatment. The effects of treatment on the morphology, wettability, and structure of fibers were examined by scanning electron microscopy, contact angle, and Fourier transform infrared spectroscopy analysis, respectively. In addition, the Weibull characteristic was used to find the variability in strength of the fibers with respect to surface treatment. Furthermore, the IFSS of EFB fiber-PLA sandwich was investigated through single-fiber pull-out test, using a less strenuous technique. The mechanical properties (tensile strength, tensile modulus, flexural strength, and flexural modulus) of the composites were determined through mechanical testing. A comparison was drawn among the properties of PLA, raw EFB fiber-based composites, and treated EFB fiber-based composites. Additionally, the inter- and intra-relationship of fiber treatment, wettability, and IFSS with the mechanical properties of the PLA/EFB composites were also accounted.

Experimental Study of Shear Strength of Unsaturated Silty Clay of Yellow River Levee

2012 ◽  
Vol 446-449 ◽  
pp. 1979-1983
Author(s):  
Cui Ran Liu ◽  
Li Wang ◽  
Jin Jun Guo
Keyword(s):  
Shear Strength ◽  
Unsaturated Soil ◽  
Yellow River ◽  
Effective Means ◽  
Silty Clay ◽  
Long Duration ◽  
Matrix Suction ◽  
Strength Formula ◽  
Relationship Of ◽  
The Relationship

Tri-axial test is one of effective means to measure the strength of unsaturated soil. But because of complexity and exquisite requirement with and long duration of test, unsaturated tri-axial test wasn’t used extensively in civil engineering before. The tests of shear strength of unsaturated soil are performed with the improved tri-axial apparatus for unsaturated soil. According to test data, the relationship of strength between water content and matrix suction are studied. In addition, the new shear strength formula suitable for yellow river is derived. The formula is the theory basis for analysis of unsaturated slope stability.

Behavior of Cemented Reticulate Red Clay

2012 ◽  
Vol 446-449 ◽  
pp. 1666-1669 ◽  
Author(s):  
Jian Zhong Li ◽  
Li Chun Zhuo ◽  
Xi Ni
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Cement Content ◽  
Axial Strain ◽  
Test Results ◽  
Compression Tests ◽  
Red Clay ◽  
Reticulate Red Clay ◽  
Strain Deviator ◽  
Relationship Of

Mechanical properties of cemented reticulate red clay were studied in present research. Test results show that: (1) shear strength of cemented reticulate red clay increase exponentially as the increasing of cement content; (2) shear strength of cemented reticulate red clay decrease polynomially as the increasing of water content; (3) mechanical properties of cemented reticulate red clay affected significantly by curing time and curing confined pressure. In order to study viscous properties of cemented reticulate red clay, cemented reticulate red clay specimens were compressed in triaxial chamber at different shear rate. Results of the compression tests show that it is obvious that the axial strain-deviator stress relationship of cemented reticulate red clay affects by the strain rate.

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