... untreated sea sand and artificially configured seawater. The tensile and compressive properties of ECC and the bonding properties between glass fiber–reinforced polymer (GFRP) bars and ECC were studied. The effects of ECC matrix type, bond length, and strain rate on the bonding performance were considered...

... are available in standard length sections and joined together to get customized length using fusion-welding techniques. The strength of welds highly depends on welding parameters such as temperature, heat, and soaking time. The structural performance also varies with respect to strain rate. In this paper...

... of stress-strain curves and the corresponding mechanical properties. In this work, a new sample geometry and a corresponding measurement method are presented and analyzed. This new method allowed for the determination of oscillation-free, true stress-strain curves at high strain rates. Because a new minor...

...Ji Qiu; Tao Jin; Buyun Su; Qian Duan; Xuefeng Shu; Erqiang Liu; Zhiqiang Li An experiment was conducted to study the strain rate sensitivity of yield behavior in an amorphous polymer, poly(methyl methacrylate) (PMMA). Compression, tension, shear, and combined shear-compression tests were conducted...

... the tested specimens were fractured at the middle where the cross-sectional area was reduced by 20 %. Also, no crushing failure or slippage was observed at the ends of the tested specimens. Keywords direct tensile testing, concrete, uniaxial tension, stress-strain behavior, strain rate Introduction Tensile...

... increases with decreasing P/P . 2) The hardness value itself, and its decreasing rate with depth, increase with increasing P/P . 3) A constant P/P can result in a constant indentation strain rate ( h/h ), even if indentation size effects (ISE) exist in the materials. 4) The relationship between P/P and h/h...

...Y El-Saied Essa; J Fernández-Sáez; JL Pérez-Castellanos The effects of strain rate and temperature on the mechanical behavior of a magnesium alloy (ZC71) and its corresponding composite reinforced with SiC particles are investigated. The experimental procedures of testing at high strain rate...

...NMS Al-Bastaki Unplasticized PVC pipes were tested using static and dynamic testing conditions. The static test was performed by pressurizing the pipes at a strain rate of 1 × 10 −4 s −1 and the dynamic test was carried out using a drop hammer apparatus at a strain rate of 8 s −1 . The most...

... practiced. This paper describes the use of the triaxial compression test for asphaltic mixtures for determining their engineering properties such as the friction angle φ, the cohesion, c , and the elastic compression modulus, E . Effects of test temperatures, strain rate, and confining pressures...

...DC Davis Within recent years, material science researchers have attempted to develop unified or strain rate sensitive constitutive theories to characterize the mechanical behavior of metal alloys in the creep regime. Some of these theories, such as that by E. W. Hart, employ short-time load...

...G Fitzsimons; HA Kuhn; AJ DeArdo; V Semple A simple device that provides control for constant true strain rate compression (or tension) tests in closed-loop servohydraulic testing machines is described. In the present system, it has been used at strain rates up to 20 s −1 . Intended for use in hot...

...R Chait Strain rate effects for the high strength, metastable beta-titanium alloy Ti-8Mo-8V-2Fe-3Al are assessed in terms of tensile and fracture toughness behavior. It is shown that as the strain rate increases the yield strength, ultimate tensile strength, and ductility also increase. As a result...

... is changed from zero to some finite value. This method has shown that the stiffness can be taken as a constant within fairly wide ranges of the load level, crosshead speed, and specimen dimensions. mechanical tests stress relaxation tests strain rate tensile machine stiffness References...

... yield point value in steel standards and in practical material testing. This dilemma may to a great extent be due to the people involved in standardization themselves exaggerating the difference between R e H and R e L . Both yield point values are dependent on the strain rate, which again may...

...RB Clough A new method for determining the proportional limit of engineering materials, characterized by maximum stress rate, is presented. Simultaneous measurement of stress rate and strain rate also permits a new means of measuring machine stiffness which has certain advantages over present...

... at rates from about 10 −3 to 10 3 °C/s and then immediately pulled to failure at a constant strain rate of about 10/s. These heating rates, which correspond to approximate times-at-temperature in the range of 10 −1 to 10 5 s, produce a large change in yield stress between times-at-temperature of 10 2 to 10...

... the wall were increased. A new effective radius is proposed for calculation of strains, strain rates, and shear stresses from torque-twist data for solid and tubular specimens. D. R. Barraclough, 1 H. J. Whittaker, 1 K. D. Nair, 2 and C. M. Sellars I Effect of Specimen Geometry on Hot Torsion Test Results...

...H Conrad; J Hurd; D Woodard Data on the fracture toughness of beryllium obtained by the authors and that available in the literature are reviewed. The effects of test method, chemistry and microstructure, temperature and strain rate, and fracture modes are discussed. The available data suggest...