The Experts below are selected from a list of 288 Experts worldwide ranked by ideXlab platform
Xu Guo-hu - One of the best experts on this subject based on the ideXlab platform.
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Experimental Study on Interfacial Shear Strength of Stratified Soils
Coastal Engineering, 2015Co-Authors: Xu Guo-huAbstract:Based on the laboratory tests carried out with a self-designed device for measuring soil interfacial Shear Strength,the interfacial Shear Strength and the interfacial friction of the stratified soils with different clay content,water content and Shear rate are studied.The results show that when it comes to the same conditions,between the stratified soils with a lower clay content the interfacial Shear Strength and the interfacial friction increase with the clay content,whereas between those with a higher clay content the interfacial Shear Strength and the interfacial friction decrease with the clay content.The interfacial Shear Strength and the interfacial friction between the stratified soils decrease with the increase of water content.When the Shear rate of the stratified soils changes the interfacial Shear Strength increases with the Shear rate,but the interfacial friction varies little.
Said M. Allam - One of the best experts on this subject based on the ideXlab platform.
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Shear Strength of Reinforced Concrete Wide Beams
International Review of Civil Engineering, 2013Co-Authors: Said M. AllamAbstract:The equations recommended by the ACI code and the Egyptian code are conservative in estimating the Shear Strength of beams having a depth not exceeding 250 mm. Such codes ignore the contribution of web reinforcement to the Shear Strength of those beams. In addition the Egyptian code recommends a two-third reduction to the Shear Strength carried by the concrete. In this paper, an experimental program was conducted to study the Shear Strength of reinforced concrete wide beams having depths of 200 mm and 250 mm and a width to depth ratio between 1 and 2. The effect of web reinforcement was considered. Test results revealed the significant contribution of both concrete and the web reinforcement to the Shear Strength of wide beams. However, it was found that the Shear Strength of wide beams is reduced in the case of concentrated load applied to a part of the beam width. Furthermore, the equations presented by both the ACI code and the Egyptian code were found to be conservative in estimating the Shear Strength of wide beams. It is recommended that special provisions should be presented by codes for wide beams other than those provided for solid slabs, footings, and large members
Delwyn G. Fredlund - One of the best experts on this subject based on the ideXlab platform.
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Shear Strength Criteria for Unsaturated Soils
Geotechnical and Geological Engineering, 2009Co-Authors: Daichao Sheng, An-nan Zhou, Delwyn G. FredlundAbstract:Shear Strength is one of the fundamental properties of unsaturated soils. It has been found to change with matric suction. Various Shear Strength equations have been proposed for predicting the Shear Strength versus suction relationship for unsaturated soils. Some of these equations are based on regression analysis of experimental data, while some are embodied in more complex stress–strain constitutive models. In this paper, a variety of Shear Strength equations are examined and compared with respect to their fit of experimental data. Data for specimens prepared from initially slurry conditions as well as data for initially compacted soil specimens are analysed. The advantages and limitations associated with various proposed Shear Strength equations are discussed in this paper.
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Shear Strength characteristics of two saprolitic soils
Canadian Geotechnical Journal, 1996Co-Authors: Delwyn G. FredlundAbstract:The saturated and unsaturated Shear Strength behavior of an undisturbed, completely decomposed fine ash tuff and an undisturbed, completely decomposed granite from Hong Kong were studied using direct Shear and triaxial tests. The completely decomposed fine ash tuff is a fine- to medium-grained saprolite. The completely decomposed granite is a coarse-grained saprolite. Results show that matric suction increases the Shear Strength of both soils. The extent of the increase is the Shear Strength with matric suction is related to the soil-water characteristic curve for the soil and to the amount of dilation during Shear. The effect of matric suction on the Shear Strength was more pronounced for the fine- to medium-grained completely decomposed fine ash tuff than for the coarse-grained completely decomposed granite. These studies on the saprolitic soils provide insight into the understanding of the Shear Strength of unsaturated, coarse-grained soils. Key words: saprolites, Shear Strength, matric suction, triaxi...
M A Meyers - One of the best experts on this subject based on the ideXlab platform.
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interfacial Shear Strength in abalone nacre
Journal of The Mechanical Behavior of Biomedical Materials, 2009Co-Authors: M A MeyersAbstract:Abstract The Shear Strength of the interface between tiles of aragonite in the nacre of red abalone Haliotis rufescens was investigated through mechanical tensile and Shear tests. Dog-bone shaped samples were used to determine the tensile Strength of nacre when loaded parallel to the plane of growth; the mean Strength was 65 MPa. Shear tests were conducted on a special fixture with a Shear gap of 200 μm, approximately 100 μm narrower than the spacing between mesolayers. The Shear Strength is found to be 36.9±15.8 MPa with an average maximum Shear strain of 0.3. Assuming the majority of failure occurs through tile pull-out and not through tile fracture, the tensile Strength can be converted into a Shear Strength of 50.9 MPa. Three mechanisms of failure at the tile interfaces are discussed: fracture of mineral bridges, toughening due to friction created through nanoasperities, and toughening due to organic glue. An additional mechanism is fracture through individual tiles.
Liyong Tong - One of the best experts on this subject based on the ideXlab platform.
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Bond Shear Strength for adhesive bonded double-lap joints
International Journal of Solids and Structures, 1994Co-Authors: Liyong TongAbstract:Abstract For adhesively bonded double-lap joints with an arbitrarily nonlinear Shear stress-strain property, a simple formula is developed for predicting the bond Shear Strength developable between the adherends for the cohesive Shear failure mode. In this formula, the bond Shear Strength is characterized by the maximum Shear strain energy density of the adhesive. The thermal mismatch effect is highlighted in terms of reducing the bond Shear Strength for balanced joints, and in terms of either decreasing or increasing the bond Shear Strength for the stiffness unbalanced joints.
