The Broken Analysis of 220kV Transmission Line Tension Crimp Barrel Steel Core

2014 ◽  
Vol 926-930 ◽  
pp. 950-953
Author(s):  
Guo Dong Han ◽  
Shu Ting Wan ◽  
Zhang Qin Wu ◽  
Zhan Jie Lv ◽  
Rong Hai Liu ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Transmission Line ◽  
Visual Inspection ◽  
Line Tension ◽  
Strength Test ◽  
Accident Analysis ◽  
Test Results ◽  
Size Measurement ◽  
Tensile Strength Test ◽  
Steel Core

Through the visual inspection, the appearance of size measurement, crimping size measurement, the steel core crimping length measurement and steel core tensile strength test of tension crimp barrel on 220kV transmission line. Made a detail analysis on test results combined with wire crimping theory. Pointed out the wire crimping defects caused by crimping irregularities. Analyzed the main causes of rupture accident, and made recommendations for improvement. Provides a reference to wire crimp and wire accident analysis.

scholarly journals Evaluating Marination Effect of Diluted Zycothermon Hot Mix Asphalt

2017 ◽  
Vol 3 (3) ◽  
pp. 18
Author(s):  
Ilham I. Mohammed
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Hot Mix Asphalt ◽  
Asphalt Mixture ◽  
Strength Test ◽  
Stability Test ◽  
Test Results ◽  
Great Range ◽  
Tensile Strength Test ◽  
Moisture Conditions

Sinceasphalt concrete undergo different failure problems at different temperature and moisture conditions and for years many scientists and researchers used different kinds of materials and variety of methods for improving the properties of asphalt concrete made with either basalt or limestone.So it became necessary to provide the best possible way to get rid of these failure problems.In this study diluted zycotherm nanomaterial at three different percentages by weight of aggregate used with two aggregate types, basalt and limestone, and asphalt concrete made with the marinated aggregate and later the properties of asphalt concrete were investigated after the marination.Indirect tensile strength test and retained stability test results were used to evaluate the marinating effect.As a result zycotherm dilution by weight of aggregate has changed the properties of asphalt mixture and improved to a great extent. From the results it can be concluded that rutting and fatigue problems decreased with a great range.

scholarly journals SCARF JOINTS IN GLUED LAMINATED TIMBER OF PARICÁ

FLORESTA ◽  
2021 ◽  
Vol 51 (3) ◽  
pp. 713
Author(s):  
Rodrigo Figueiredo Terezo ◽  
Talitha Oliveira Rosa ◽  
Francisco Raphael Cabral Furtado ◽  
Camilla Gabriela Melo Ampessan ◽  
Alexsandro Bayestorff Cunha ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Modulus Of Elasticity ◽  
Visual Inspection ◽  
Strength Test ◽  
Bending Test ◽  
Tensile Strength Test ◽  
Glued Laminated Timber ◽  
Schizolobium Parahyba ◽  
Scarf Joint ◽  
Scarf Joints

Glued Laminated Timber (GLULAM) is manufactured by joining wood lamellae glued in parallel to each other. GLULAM with larger longitudinal dimensions can be obtained by gluing the tops of two wood lamellae. The gluing of the tops can be done using wedge-shaped scarf joints. However, the joints produce a discontinuity in the wood, being areas considered as susceptible to rupture. In this way, the objectives were to evaluate four slopes (1:6; 1:8; 1:10 and 1:12) in scarf joints of Schizolobium parahyba var. amazonicum timber for use with structural purposes; and glued laminated timber beams – GLULAM manufactured with the scarf joint with the best performance by the modulus of elasticity – MOE (theoretical and analytical MOE values). Each laminated timber used to produce the test specimens was classified by visual inspection that aimed at the absence of defects, such as knots. The test specimens were adapted to the four-point static bending test and to the tensile strength test in parallel to the grain direction, in accordance to the NBR 7190 (1997). The slope of 1:12 showed the best results, while the slope of 1:6 presented the lowest results when compared with the control. The beams of 5 x 9.5 x 220 cm, composed of joints with slopes of 1:12, showed MOE values statistically equal to those of beams without joints. The scarf joint proved to be an alternative for use in glulam beams of paricá, as it presents stiffness and strength comparable with those of beams without a joint.

scholarly journals Tensile Strength of Bamboo After Preservation

2020 ◽  
Vol 3 ◽  
pp. 153-155
Author(s):  
Noverma ◽  
Oktavi Elok Hapsari ◽  
Yusrianti
Keyword(s):  
Tensile Strength ◽  
Research Method ◽  
Test Sample ◽  
Strength Test ◽  
Test Results ◽  
High Tensile Strength ◽  
Time Duration ◽  
Tensile Strength Test ◽  
Weather Changes ◽  
X 24

Bamboo has high tensile strength, so it can be an alternative to substitute wood or steel. Bamboo is a material that comes from nature, so it is vulnerable to degraded by weather changes and infected by termites and fungi. The effort to overcome this problem is by preserving before using it. This study aims to determine the tensile strength test results of bamboo after preserving and then compare with the tensile strength test results of bamboo without preserving. The research method was carried out by preserving bamboo by soaking the test sample in a container filled with water for a duration of time; 1 x 24 hours; 3 x 24 hours and 14 x 24 hours. The water used in freshwater with a salinity of 0 0/00 measured using a salinometer. The results showed that the tensile strength of bamboo increased compared without preserved with a percentage of 12.50%; 23.12% and 10.59% for the duration of time respectively 1x24 hours; 3x24 hours and 14x24 hours. Optimal tensile strength is obtained at a time duration of 3 x 24 hours and decreases at a longer time duration of 14x24 hours.

scholarly journals Superficial morphology and mechanical properties of in vivo aged orthodontic ligatures

2013 ◽  
Vol 18 (3) ◽  
pp. 107-112 ◽  
Author(s):  
Glaucio Serra Guimarães ◽  
Liliane Siqueira de Morais ◽  
Margareth Maria Gomes de Souza ◽  
Carlos Nelson Elias
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Strength Test ◽  
Test Method ◽  
Test Results ◽  
Tensile Strength Test ◽  
Oral Environment ◽  
Scanning Electron

INTRODUCTION: The degradation of elastic ligatures in the oral environment results in the need of periodic replacement to maintain the optimal force during the orthodontic treatment. The purpose of this study was to perform a clinical prospective randomized study of the degradation of orthodontic elastomeric ligatures in the oral environment by scanning electron microscopy (SEM) and tensile strength test. METHOD: Two hundred elastic ligatures were randomly selected and placed around the brackets of 5 volunteers and removed in groups of 10, at different times (1, 2, 3, and 4 weeks). The control group was performed by another fifty ligatures which were not submitted to the oral degradation. The analyses were done by scanning electron microscopy (SEM) and strength mechanical test. RESULTS: The tensile strength test results showed reduction in the ultimate strength values after four weeks ageing in the oral environment and no statistical difference in the yield strength values (p < 0.05). The orthodontic elastomeric ligatures surface was significantly degraded in the oral cavity after four weeks. The elastomeric degradation began in the first week when the increase in the roughness could be detected just in some areas. Afterwards, the surface became gradually rougher and, after 4 weeks, it was totally rough with some crack areas. CONCLUSIONS: The elastic ligatures aged in the oral environment showed higher superficial degradation and lower loss of mechanical properties after the maximum experimental period.

Study on Crack Bridging Ability of Polymer-Modified Cement Based Compounds for Waterproofing Material

2015 ◽  
Vol 1129 ◽  
pp. 217-221 ◽  
Author(s):  
Hong Zhao ◽  
Wei Li ◽  
Yong Ming Zhang
Keyword(s):  
Tensile Strength ◽  
Strength Test ◽  
Test Method ◽  
Test Results ◽  
Engineering Applications ◽  
Crack Bridging ◽  
Ability Test ◽  
Elongation At Break ◽  
Tensile Strength Test ◽  
Good Ability

China's existing polymer-modified cement based compounds for waterproofing material standards are used for the tensile strength test and elongation at break test as the test method to evaluate the performance of the product extension. The elongation only reflects the extension ability of product, but cannot indicate the crack bridging ability of the product. In engineering applications, there is a requirement for higher bridging cracks ability of the products. In this paper, 9 samples of polymer-modified cement based compounds for waterproofing material were tested. Crack bridging ability was tested under the standards and methods in DIN EN 14891:2013-07. Tensile strength and elongation at break were tested according to the standards and methods in GB23445:2009. The crack bridging ability test results are between 0 to 2.08mm, in which 5 of them meet the requirements of greater than 0.75mm according to DIN EN14891:2013-07.The tensile strength test results are between 1.13MPa to 3.19MPa, the elongation at break test results are between 4% to 350%.The results show that higher tensile strength and higher elongation at break will have good ability of crack bridging. Samples with better crack bridging ability are close to type III product according to GB23445-2009 which requires tensile strength ≥ 1.8MPa and elongation at break ≥ 30%. Crack bridging ability directly reflects the product’s ability of crack bridging, and is more in line with the actual requirements in engineering applications. It is recommended that the crack bridging ability test method should be adopted in the formulation of China polymer-modified cement compounds for waterproofing material standards.

scholarly journals Simulation Analysis and Experimental Study on Strength Optimization of a Plug-In Oil Hose Joint

2018 ◽  
Vol 2018 ◽  
pp. 1-22
Author(s):  
Chang Chen ◽  
Jikun Guo ◽  
Shifu Zhang ◽  
Qixin Zhang ◽  
Dongmei Zhang ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Field Experiments ◽  
Simulation Analysis ◽  
Structural Characteristics ◽  
Geometric Model ◽  
Three Dimensional ◽  
Strength Test ◽  
Test Results ◽  
Tensile Strength Test ◽  
Oil Transportation

A plug-in oil hose joint is used as the research object in this study. Aimed at the problem of pipeline breakage due to insufficient strength of the joint during the process of oil transportation on the sea, a three-dimensional geometric model of the joint is constructed according to the structural characteristics of the plug-in joint. The mechanical properties of the plug-in hose joint were studied by numerical simulations and field experiments. The strength of the joint was optimized by applying materials with different properties and adjusting the circular angle of the joint. The tensile strength test results of the plug-in oil hose joint are consistent with the theoretical analysis, which shows that the method proposed in this paper can effectively improve the tensile strength of the oil hose joint. It is of great significance to expand the scope of the plug-in connector and ensure the safe and stable use of the hose system.

scholarly journals EFFECT OF PARTIAL REPLACEMENT OF CEMENT WITH EGGSHELL ASH (ESA) ADMIXED WITH PLASTIMENT BV-40 IN CONCRETE

2020 ◽  
Vol 4 (2) ◽  
pp. 284-289
Author(s):  
Dr.Muhammad Magana Aliyu Aliyu ◽  
Nuruddeen Muhammad Musa
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Strength Test ◽  
Ash Content ◽  
Splitting Tensile Strength ◽  
Partial Replacement ◽  
Test Results ◽  
Tensile Strength Test ◽  
Compressive Strength Test ◽  
Partial Cement Replacement

The use of eggshells ash for partial cement replacement in concrete has been well established in earlier studies. The effect of such partial replacement of cement with an eggshell ash and Plastiment BV-40 was investigated in this. Tests including slump test, compressive strength test, splitting tensile strength test and concrete density test were carried out on concrete in which cement was partially replaced with 0%, 5%, 10%, 15%, 20%, and 25% eggshell ash and presented. The test results indicate that eggshell ash decreases the workability of concrete. Also, for the compressive strength at 5% content, after which there is  decrease in the compressive strength with increase in the ash content. Furthermore, eggshell ash is found to increase the concrete splitting tensile strength. It was concluded that eggshell ash has the potential of being utilized in concrete as partial replacement of cement.

scholarly journals PENGARUH PENGGUNAAN LIMBAH PLASTIK POLYPROPYLENE (PP) SEBAGAI CAMPURAN AGREGAT KASAR TERHADAP KUAT TEKAN DAN TARIK PADA BETON FC’ 25 MPA

2019 ◽  
Vol 3 (2) ◽  
pp. 81-89
Author(s):  
Angga Pirman Firdaus ◽  
Jonbi
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Strength Test ◽  
Plastic Waste ◽  
Concrete Mixture ◽  
Strength Testing ◽  
Concrete Compressive Strength ◽  
Tensile Strength Test ◽  
Compressive Strength Test ◽  
Waste Mixture

Indonesia ranks second in the world's largest plastic waste producer after China. Each year, Indonesia can contributeup to 187.2 million tons of plastic waste, while China reaches 262.9 million tons of plastic waste. Based on the data, one way to utilize plastic waste by using plastic waste as a mixture of concrete, where the plastic used is polypropylene (PP) plastic with different percentage of concrete mixture, the test includes compressive strength test and tensile concrete. The results of concrete compressive strength testing with polypropylene (PP) plastic waste mixture of 5%, 10% and 15% at age 28 in aggregate aggregate mixture decreased by 5.15%, 6.89% and 13.53%. As for the result of concrete tensile strength test with polypropylene (PP) plastic waste mixture of 5%, 10% and 15% at age 28 in crude aggregate mixture decreased 17,61%, 24,13% dan 23,24%.

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