scholarly journals Experimental study on the effect of sustained axial tension load at early age on the tensile strength of concrete during late splitting

2020 ◽  
Vol 474 ◽  
pp. 072041
Author(s):  
Jinping Zhuang ◽  
Jianxing Chen ◽  
Xuefeng Cai ◽  
Hao Qiu
Keyword(s):  
Experimental Study ◽  
Tensile Strength ◽  
Early Age ◽  
Axial Tension ◽  
Tension Load

scholarly journals Experimental Study on the Performance of Frp Tendon Anchoring Devices in Axial Tension

2020 ◽  
Vol 15 (3) ◽  
pp. 135-143
Author(s):  
Ivan V. Abramov ◽  
Pavel V. Lekomtsev ◽  
Аlexander V. Romanov ◽  
Аndrey V. Buchkin ◽  
Zarina S. Saidova ◽  
...  
Keyword(s):  
Experimental Study ◽  
Tensile Strength ◽  
Experimental Research ◽  
Load Capacity ◽  
Tensile Tests ◽  
Strength Properties ◽  
Fiber Reinforced Polymer ◽  
Stress Range ◽  
Axial Tension ◽  
Reinforced Polymer

The paper presents an experimental research on anchoring devices developed for the pre-tensioning of fiber reinforced polymer tendons in the stress range between 40 and 70% of tensile strength. The technique of testing, the criteria of assessing the load capacity and the influence of preloading applied on the anchor wedges on the initial tendons slippage are described. The optimal technical configurations of the anchoring device have been obtained, including parameters regarding the necessary prior anchorage of the tendon ends based on the strength properties of the tendon bar and the requirements to avoid slippage during the tensile tests.

Experimental Study On The Effect Of Axial Tension Load On The Collapse Strength Of Oil Well Casing

1981 ◽  
Author(s):  
Tetsuo Kyogoku ◽  
Katsuyuki Tokimasa ◽  
Hisayuki Nakanishi ◽  
Tohru Okazawa
Keyword(s):  
Experimental Study ◽  
Oil Well ◽  
Axial Tension ◽  
Collapse Strength ◽  
Tension Load

Experimental Study of Concrete Early Creep Determination by Using Lying-Tensile Creep Device

2012 ◽  
Vol 446-449 ◽  
pp. 542-545
Author(s):  
Hong Wei Liu ◽  
Long Ma
Keyword(s):  
Experimental Study ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Ultimate Tensile Strength ◽  
Tensile Creep ◽  
Early Age ◽  
Concrete Creep ◽  
Bearing Strength ◽  
Tensile Elastic Modulus

Lying-tensile concrete creep device was designed, and the device was used at the early age of concrete in measuring the tensile elastic modulus, creep and tensile strength. Meanwhile, the using of the device to determine the parameters has been authenticated. Tests show that the usage of the device not only can determine the early age of concrete creep, elastic modulus, but also can maintain constant loads without stabilized device.Study shows that under the same conditions, the ultimate tensile strength of the concrete which were measured creep should be lower than than that of non-creep of concrete . The earlier the loaded age, the greater decreased of ultimate tensile strength, it indicats that the creep of concrete has a certain weakening effect on concrete bearing strength.

scholarly journals The Influence of the Asymmetric Arb Process on the Properties of Al-Mg-Al Multi-Layer Sheets / Wpływ Asymetrii W Procesie Arb Na Właściwości Wielowarstwowych Blach Al-Mg-Al

2015 ◽  
Vol 60 (4) ◽  
pp. 2821-2826 ◽  
Author(s):  
A. Wierzba ◽  
S. Mróz ◽  
P. Szota ◽  
A. Stefanik ◽  
R. Mola
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Tensile Strength ◽  
Rolling Process ◽  
Asymmetry Factor ◽  
Relative Reduction ◽  
Test Results ◽  
Initial Thickness ◽  
Asymmetric Rolling ◽  
Aluminium Layer

The paper presents the results of the experimental study of the three-layer Al-Mg-Al sheets rolling process by the ARB method. The tests carried out were limited to single-pass symmetric and asymmetric rolling processes. An Al-Mg-Al package with an initial thickness of 4 mm (1-2-1 mm) was subjected to the process of rolling with a relative reduction of 50%. To activate the shear band in the strip being deformed, an asymmetry factor of av=2 was applied. From the test results, an increase in the tensile strength of the multi-layer Al-Mg-Al sheets obtained from the asymmetric process was observed. Microhardness tests did not show any significant differences in aluminium layer between respective layers of sheets obtained from the symmetric and the asymmetric process. By contrast, for the magnesium layer, an increase in microhardness from 72 HV to 79 HV could be observed for the asymmetric rolling. The analysis of the produced Al-Mg-Al sheets shows that the good bond between individual layers and grain refinement in the magnesium layer contributed to the obtaining of higher mechanical properties in the multi-layer sheets produced in the asymmetric process compared to the sheets obtained from the symmetric process.

scholarly journals Experimental Study of Deformed States of Carbon Plastics Surface Layers in Axial Tension by Digital Images Correlation Method

2018 ◽  
pp. 58 ◽  
Author(s):  
А.М. Устинов ◽  
А.А. Клопотов ◽  
А.И. Потекаев ◽  
Ю.А. Абзаев ◽  
В.С. Плевков
Keyword(s):  
Experimental Study ◽  
Digital Images ◽  
Correlation Method ◽  
Surface Layers ◽  
Axial Tension ◽  
Carbon Plastics

scholarly journals Experimental Study of Tensile Strength in Composite Floats Structure Repaired with Multi-Layer Patches

2020 ◽  
Vol 16 (31) ◽  
pp. 83-94
Author(s):  
Nosratollah Sarlak ◽  
Shahrouz Yousefzadeh ◽  
Amirhosein Nasrollah Barati ◽  
◽  
◽  
...  
Keyword(s):  
Experimental Study ◽  
Tensile Strength

scholarly journals A numerical and experimental study on the tensile behavior of plasma shocked granite under dynamic loading

2017 ◽  
Vol 50 (2) ◽  
pp. 41-62
Author(s):  
Ahmad Mardoukhi ◽  
Timo Saksala ◽  
Mikko Hokka ◽  
Veli-Tapani Kuokkala
Keyword(s):  
Experimental Study ◽  
Tensile Strength ◽  
Mechanical Behavior ◽  
Thermal Shock ◽  
Dynamic Loading ◽  
Split Hopkinson Pressure Bar ◽  
Tensile Behavior ◽  
Brazilian Disc ◽  
Brazilian Disc Test ◽  
Plasma Shock

This paper presents a numerical and experimental study on the mechanical behavior of plasma shocked rock. The dynamic tensile behavior of plasma shock treated Balmoral Red granite was studied under dynamic loading using the Brazilian disc test and the Split Hopkinson Pressure Bar device. Different heat shocks were produced on the Brazilian disc samples by moving the plasma gun over the sample at different speeds. Microscopy clearly showed that as the duration of the thermal shock increases, the number of the surface cracks and their complexity increases (quantified here as the fractal dimension of the crack patterns) and the area of the damaged surface grows larger as well. At the highest thermal shock duration of 0.80 seconds the tensile strength of the Brazilian disc sample drops by approximately 20%. In the numerical simulations of the dynamic Brazilian disc test, this decrease in tensile strength was reproduced by modeling the plasma shock induced damage using the embedded discontinuity finite element method. The damage caused by the plasma shock was modeled by two methods, namely by pre-embedded discontinuity populations with zero strength and by assuming that the rock strength is lowered and conform to the Weibull distribution. This paper presents a quantitative assessment of the effects of the heat shock, the surface microstructure and mechanical behavior of the studied rock, and a promising numerical model to account for the pre-existing crack distributions in a rock material.

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