Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: November 2015
Authors: A. Rajaraman, Philip Saratha Joanna, Dalbir Singh, C. Ganesan
A series of experiments were carried out to find the variation in mechanical properties in all composites due to displacement controlled tests with different displacement rates such as 0.5mm/min, 1.0 mm/min and 1.5mm/min.
The main reason is that mechanical properties of composite materials vary significantly with changing the displacement rate and strain rate due to their non homogeneity nature [2, 3].
This will directly affect the strength and performance of all composites at different stages.
Conclusions The present study examined the effect of displacement control rates on the mechanical properties of advanced composites such as GFRP, CFRP and KFRP.
Reis, Effects of Strain Rate and Temperature on the Mechanical Properties of Gfrp Composites, Engenharia Térmica (Thermal Engineering). 10 (2011) 03-06
The main reason is that mechanical properties of composite materials vary significantly with changing the displacement rate and strain rate due to their non homogeneity nature [2, 3].
This will directly affect the strength and performance of all composites at different stages.
Conclusions The present study examined the effect of displacement control rates on the mechanical properties of advanced composites such as GFRP, CFRP and KFRP.
Reis, Effects of Strain Rate and Temperature on the Mechanical Properties of Gfrp Composites, Engenharia Térmica (Thermal Engineering). 10 (2011) 03-06
Online since: August 2013
Authors: Ying Wang, Bao Kuan Ning, He Fan
Main factors affecting the mechanical properties of culvert structure is vertical earth pressure on culvert top, which largely instructs culvert structure design dimensions.
Earth pressure factor can reach 1.7 or 1.8 by using Marston theory.
Factor K increased with fill height on Marston theory.
Factor K increased with fill height to a certain value, then, almost no change on ZENG Guo-xi theory.
Factor K decreased with fill height on GU An-quan theory.
Earth pressure factor can reach 1.7 or 1.8 by using Marston theory.
Factor K increased with fill height on Marston theory.
Factor K increased with fill height to a certain value, then, almost no change on ZENG Guo-xi theory.
Factor K decreased with fill height on GU An-quan theory.
Online since: July 2015
Authors: Md Abdul Maleque, Yeakub Ali Mohammad, B.A. Ghazal, M. Hayyan, A.A. Saleh
They possess superior mechanical properties and toughness but prone to wear and corrosion hence, they exhibited tribological properties make them susceptible to unexpected failure.
However, TiC is considered as the most due its high specific strength, chemical stability, high oxidation resistance and good mechanical bonding to the steel matrix [5].
The melt track dimensions were ~ 970 µm in depth and 3.1 mm width with a heat affected zone (HAZ) of 1.91 mm.
Upon exposure to biodiesel the ester end of the biodiesel molecule is absorbed by the exposed surface forming an oxide barrier layer which act as a defect barrier layer with a semiconductor properties due to the high electrical impedance of the biodiesel [7].
Haseeb, Effect of mechanical factors on tribological properties of palm oil methyl ester blended lubricant, Wear, vol. 239, pp. 117-125, 2000.
However, TiC is considered as the most due its high specific strength, chemical stability, high oxidation resistance and good mechanical bonding to the steel matrix [5].
The melt track dimensions were ~ 970 µm in depth and 3.1 mm width with a heat affected zone (HAZ) of 1.91 mm.
Upon exposure to biodiesel the ester end of the biodiesel molecule is absorbed by the exposed surface forming an oxide barrier layer which act as a defect barrier layer with a semiconductor properties due to the high electrical impedance of the biodiesel [7].
Haseeb, Effect of mechanical factors on tribological properties of palm oil methyl ester blended lubricant, Wear, vol. 239, pp. 117-125, 2000.
Online since: January 2017
Authors: Arisara Chaikittiratana, Tonkid Chantrasmi, Sacharuck Pornpeerakeat, Sitthichai Limrungruengrat
The mechanical properties and service performances of the rubber products are greatly affected by the state of cure or cure level of rubbers, especially in large rubber parts.
The parameters n,m,A1,A2,E1 and E2 are constants dependent on the specific choice of curing kinetic model and material properties.
Thermal properties such as conductivity and heat capacity can be described as functions of temperature and cure level.
The material’s thermal and cure kinetics properties are taken from [11].
Thermal properties such as conductivity and heat capacity can be described as functions of temperature and cure level.
The parameters n,m,A1,A2,E1 and E2 are constants dependent on the specific choice of curing kinetic model and material properties.
Thermal properties such as conductivity and heat capacity can be described as functions of temperature and cure level.
The material’s thermal and cure kinetics properties are taken from [11].
Thermal properties such as conductivity and heat capacity can be described as functions of temperature and cure level.
Online since: October 2011
Authors: Hong Li, Sheng Ling Hao, Dong Fang Zhang
In view of the above situation, the research group carried out the experimental study on this kind of abnormal nodes, researching its broken mechanism and influence factors, in order to build the seismic design scheme that is suited to the abnormal node and the restoring model of beam-and-column combination that contains this kind of node.
However, the experimental method considers only a small part of the effect of influencing factors, the calculation model built is quite complex, and all this will easily bring about personal factors and corresponding limitations; on the other hand, many difficulties in the analysis of the nonlinear finite element will be brought about by the uncertainty in the calculating constitutional relationship by the finite element method.
This paper make use of the relevant test data and additional data from previous test for building neural network model to predict shear bearing capacity of abnormal nodes of the reinforced concrete frame, to explore the applicability of neural network method in the study of the mechanical properties of concrete.
Considering of those factors influencing the shear bearing capacity in the process of building model in this experiment as many as possible, the error which caused by man-made assumptions and simplify is avoided when the model is built.
It provides a new scientific and practical method for earthquake resistant capability of abnormal nodes and research on mechanical properties with a high value in engineering application.
However, the experimental method considers only a small part of the effect of influencing factors, the calculation model built is quite complex, and all this will easily bring about personal factors and corresponding limitations; on the other hand, many difficulties in the analysis of the nonlinear finite element will be brought about by the uncertainty in the calculating constitutional relationship by the finite element method.
This paper make use of the relevant test data and additional data from previous test for building neural network model to predict shear bearing capacity of abnormal nodes of the reinforced concrete frame, to explore the applicability of neural network method in the study of the mechanical properties of concrete.
Considering of those factors influencing the shear bearing capacity in the process of building model in this experiment as many as possible, the error which caused by man-made assumptions and simplify is avoided when the model is built.
It provides a new scientific and practical method for earthquake resistant capability of abnormal nodes and research on mechanical properties with a high value in engineering application.
Online since: September 2011
Authors: Amir Chahardehi
aa.chahardehi@cranfield.ac.uk
Keywords: CO2 Transport Pipelines, Structural Integrity, Stress Intensity Factor, Toughness, Ductile Failure, Brittle Failure, Crack Propagation.
A critical part of the structural integrity model should deal with the arrest and initiation stress intensity factors; Gray et al. have conducted tests on mild steels and demonstrated that the two values are identical in sub zero temperatures [23].
This type of test, modified to account for the requirements of CO2 pipelines in terms of steel type, thickness and geometry constraint, can be used as a tool in the generation of the material property database.
[6] W.A Maxey, Factors Affecting Ductile Fracture in Offshore Gas Pipelines, Proceedings of the Offshore Technology Conference, OTC4241, 14th Annual OTC, May 1982, Houston, USA
Priest, The Arrest of Propagating Cracks, Practical Applications of Fracture Mechanics to Pressure Vessel Technology, Institution of Mechanical Engineers, 1971
A critical part of the structural integrity model should deal with the arrest and initiation stress intensity factors; Gray et al. have conducted tests on mild steels and demonstrated that the two values are identical in sub zero temperatures [23].
This type of test, modified to account for the requirements of CO2 pipelines in terms of steel type, thickness and geometry constraint, can be used as a tool in the generation of the material property database.
[6] W.A Maxey, Factors Affecting Ductile Fracture in Offshore Gas Pipelines, Proceedings of the Offshore Technology Conference, OTC4241, 14th Annual OTC, May 1982, Houston, USA
Priest, The Arrest of Propagating Cracks, Practical Applications of Fracture Mechanics to Pressure Vessel Technology, Institution of Mechanical Engineers, 1971
Online since: August 2010
Authors: Cheng Yong Wang, Yue Xian Song, Zhe Qin, Yi Xin Yang, Lin Lin Xu, Han Yuan Chen
The result shows that the drilling force and temperature are affected by the feed
rate and drilling speed, which vary with the drilling depth into the bone.
Because different types and different position of bones existing diverse mechanical properties, as well as the demand of postoperative recovery and rehabilitation cycle of bone tissue, orthopedic surgery has specificity of processing.
This temperature is the highest safe temperature which will prevent the generation of irreversible change of bone structure and physical properties.
They found that the drilling speed, the drill feed rate and the drilling tool geometry were the influencing factors of drilling process.
Therefore, shape designing of drills is also an important factor for control of drilling force.
Because different types and different position of bones existing diverse mechanical properties, as well as the demand of postoperative recovery and rehabilitation cycle of bone tissue, orthopedic surgery has specificity of processing.
This temperature is the highest safe temperature which will prevent the generation of irreversible change of bone structure and physical properties.
They found that the drilling speed, the drill feed rate and the drilling tool geometry were the influencing factors of drilling process.
Therefore, shape designing of drills is also an important factor for control of drilling force.
Online since: January 2012
Authors: Jiong Wang, Zhi Biao Guo, Feng Zhou, Feng Bin Su, Bao Liang Li
Introduction
In situ stress is one of the most principal and basic factors causing the deformation and failure of the surrounding rock mass and support, as well as the dynamic disasters in mining engineering [1,2].
All the factors influencing the mining stability should be investigated and analyzed comprehensively and in detail at first for the reasonable mining design and construction.
The design with rational technology, safe construction and higher economic profit cannot be guaranteed without mastering these factors with calculations and analysis [4].
(Fig.3) Layout of the Measuring Points In situ stress measurement is influenced by many factors, and the selection of the right measuring points is the most important one.
Rock mechanical parameters Table 1 showed the rock mechanical properties of rock cores measured in lab as lack of field experiment systems.
All the factors influencing the mining stability should be investigated and analyzed comprehensively and in detail at first for the reasonable mining design and construction.
The design with rational technology, safe construction and higher economic profit cannot be guaranteed without mastering these factors with calculations and analysis [4].
(Fig.3) Layout of the Measuring Points In situ stress measurement is influenced by many factors, and the selection of the right measuring points is the most important one.
Rock mechanical parameters Table 1 showed the rock mechanical properties of rock cores measured in lab as lack of field experiment systems.
Online since: March 2024
Authors: Ari Handono Ramelan, Devara Ega Fausta, Hery Purwanto, Ahmad Marzuki, Frisca Aulia Alvyanti, Artono Dwijo Sutomo, Harjana Harjana, Anisa Nandita Rahmawati, Rivina Oktafiani, Retno Willy Astuti
The other physical properties can be obtained by assisted some mathematical equation.
It was shown both of these properties have same decline trend.
The reduction of Vt may due to packing factor of Na2O is 11.2 cm3/mole is smaller than B2O3 which have packing factor 20.8 cm3/mole.
Murthy, Elastic properties of boro-tellurite glasses doped with europium oxide, J.
Elsayed, Structural and mechanical features of some lanthanum tellurite glasses, Can.
It was shown both of these properties have same decline trend.
The reduction of Vt may due to packing factor of Na2O is 11.2 cm3/mole is smaller than B2O3 which have packing factor 20.8 cm3/mole.
Murthy, Elastic properties of boro-tellurite glasses doped with europium oxide, J.
Elsayed, Structural and mechanical features of some lanthanum tellurite glasses, Can.
Online since: February 2013
Authors: Li Na Sun, Tie Heng Sun, Su Chen, Lei Chao
Cd, Pb and other heavy metals enter soil through various channels, which stay in the environment for a long time and directly or indirectly affect agricultural yield and quality.
Plant absorption and accumulation of Cd, Pb and other heavy metals are affected by many factors, such as soil moisture, texture, pH value, organic matter, organic acid, coexisting elements [2-5], and there are many studies in these aspects.
Basic physical and chemical properties of the soil are shown in Table 1.
Table 1 Basic physical and chemical properties and contents of heavy metals in test soil pH Organic matter / % Mechanical composition / % Heavy metal content / mg/kg Sand Particle Clay particle Cd Pb 6.50 1.55 21.4 46.5 32.1 0.12 18.35 Test plant: wheat (Liaochun No. 10, Triticum aestivum.
Basic physical and chemical properties of soil are measured by conventional analysis of soil agrochemistry [10].
Plant absorption and accumulation of Cd, Pb and other heavy metals are affected by many factors, such as soil moisture, texture, pH value, organic matter, organic acid, coexisting elements [2-5], and there are many studies in these aspects.
Basic physical and chemical properties of the soil are shown in Table 1.
Table 1 Basic physical and chemical properties and contents of heavy metals in test soil pH Organic matter / % Mechanical composition / % Heavy metal content / mg/kg Sand Particle Clay particle Cd Pb 6.50 1.55 21.4 46.5 32.1 0.12 18.35 Test plant: wheat (Liaochun No. 10, Triticum aestivum.
Basic physical and chemical properties of soil are measured by conventional analysis of soil agrochemistry [10].