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Online since: October 2014
Authors: Agnieszka Sękala, Aleksander Gwiazda, Wacław Banaś, Zbigniew Monica
The first four mentioned factors have limited capacity of energy dissipation because of their physical characteristics.
The elements affecting the operation of the safety valve include: · • its location in the hydraulic system, · • the time of its response to the increased pressure, · • its capacity.
They both characterizes good mechanical properties and both are oil proved.
Topolska, Physico-chemical properties of TiN films.
The effect of long-term service at elevated temperatures on structure and mechanical properties of Cr-Mo-V steel.
The elements affecting the operation of the safety valve include: · • its location in the hydraulic system, · • the time of its response to the increased pressure, · • its capacity.
They both characterizes good mechanical properties and both are oil proved.
Topolska, Physico-chemical properties of TiN films.
The effect of long-term service at elevated temperatures on structure and mechanical properties of Cr-Mo-V steel.
Online since: July 2018
Authors: Yu Wang, Bin Liu, Qiang Yang, Ya Xin Liu
It is well-known that the microstructure is the most intuitive way to measure the mechanical properties of materials, including hardness and so on.
Finally, the laminated materials were tested for mechanical properties.
Iron-based amorphous alloys are superior to crystalline alloys in physical, chemical and mechanical properties, and have higher strength, toughness and corrosion resistance.
Analysis of Mechanical Properties of Different Consolidation Rates.
Study on Microstructure and Mechanical Properties of Ti6Al4V Titanium Alloy Joint with Ultrasonic Consolidation[J]. 2018
Finally, the laminated materials were tested for mechanical properties.
Iron-based amorphous alloys are superior to crystalline alloys in physical, chemical and mechanical properties, and have higher strength, toughness and corrosion resistance.
Analysis of Mechanical Properties of Different Consolidation Rates.
Study on Microstructure and Mechanical Properties of Ti6Al4V Titanium Alloy Joint with Ultrasonic Consolidation[J]. 2018
Online since: November 2021
Authors: Zeng Hua Gao, Yan Ru Wang, Da Cheng Jiao, Hua Qiong Wang, Li Li Zhang
However, as the ambient temperature to which this material is subjected continues to increase, the evaluation of the high-temperature mechanical properties is faced with higher requirements [12,13].
Therefore, high-temperature tensile mechanical properties testing methods for this type of composite material needs to be determined.
The determination of holding time The holding time is a key parameter affecting the accuracy of the test, usually the principle to determine the holding time is to reach the thermal equilibrium between the internal and external of the specimen in the thickness direction.
Test method for mechanical properties of fiber reinforced plastics at high and low temperature: GB /T 9979-2005 [12] Experimental study on high temperature tensile and compression properties of domestic CC F300/ double Ma resin laminates [13] ZHAO Hongzhen, QI Xuanhua.
Mechanical properties of pultruded carbon fibre-reinforced polymer (CFRP) plates at elevated temperatures [J].
Therefore, high-temperature tensile mechanical properties testing methods for this type of composite material needs to be determined.
The determination of holding time The holding time is a key parameter affecting the accuracy of the test, usually the principle to determine the holding time is to reach the thermal equilibrium between the internal and external of the specimen in the thickness direction.
Test method for mechanical properties of fiber reinforced plastics at high and low temperature: GB /T 9979-2005 [12] Experimental study on high temperature tensile and compression properties of domestic CC F300/ double Ma resin laminates [13] ZHAO Hongzhen, QI Xuanhua.
Mechanical properties of pultruded carbon fibre-reinforced polymer (CFRP) plates at elevated temperatures [J].
Online since: September 2013
Authors: Wei Chu Lin, Tzou Lung Luo, Yu Sheng Lai, Jui Pin Hung
Essentially, each of the various guideway systems possesses different kinematical and dynamic properties, which may thus bring machine tool to demonstrating different dynamic performances.
The contact stiffness of a sliding surface can be the function of the interface pressure and was verified to be an important factor affecting the contact stiffness and the machining performance [8].
The use of the Turcite-B slidways can also increases the damping property of the tooling system.
Kh represents the Hertz constant and is determined from the contact geometries and material properties of the contact bodies [9].
Sliding interface The contact properties of the elastic interface layer such as Turcite-B in the sliding guide system can be modeled by the following exponential relationship [10] (5) where dn is normal deformation (mm), Pn is normal pressure (N/mm2), Cn is coefficient of normal contact flexibility, and m is coefficient of non-linearity of deformations.
The contact stiffness of a sliding surface can be the function of the interface pressure and was verified to be an important factor affecting the contact stiffness and the machining performance [8].
The use of the Turcite-B slidways can also increases the damping property of the tooling system.
Kh represents the Hertz constant and is determined from the contact geometries and material properties of the contact bodies [9].
Sliding interface The contact properties of the elastic interface layer such as Turcite-B in the sliding guide system can be modeled by the following exponential relationship [10] (5) where dn is normal deformation (mm), Pn is normal pressure (N/mm2), Cn is coefficient of normal contact flexibility, and m is coefficient of non-linearity of deformations.
Online since: October 2014
Authors: Fei Hu Zhang, Guo Dong Lu, Min Hui Liu
Silicon carbide ceramics with its excellent physical and mechanical properties have become the preferred material for space large diameter mirror.
This damage will reduced material strength and affect the material life.
Choice of experimental factors are: spindle speed, feed rate and grinding depth and set up four level for each factor.
The maximum depth of sub-surface crack size directly affects the performance of the material.
Though the single factor experiment, research on the effect of subsurface quality with grinding parameter.
This damage will reduced material strength and affect the material life.
Choice of experimental factors are: spindle speed, feed rate and grinding depth and set up four level for each factor.
The maximum depth of sub-surface crack size directly affects the performance of the material.
Though the single factor experiment, research on the effect of subsurface quality with grinding parameter.
Online since: September 2014
Authors: Audrius Vaitkus, Tadas Andriejauskas, Laura Čygaitė, Jurgita Židanavičiūtė
The article gives an overview about the main transport noise source tyre/road noise, its generation mechanisms and influencing factors.
Tyre/road interaction is influenced by different factors related with road surface, tyre properties, driving behaviour and environmental conditions where tyre/road noise can be expressed as a whole of these factors’ impacts on noise generation mechanisms [4]: · Road surface characteristics: texture, porosity, layer thickness, aggregate properties, stiffness, age, colour etc.
· Environmental factors: temperature, water on road surface, precipitation and wind.
· Driver behavioural factors: driving speed and manoeuvres.
Therefore it was decided to improve and optimise SMA and AC mixtures for noise reduction properties.
Tyre/road interaction is influenced by different factors related with road surface, tyre properties, driving behaviour and environmental conditions where tyre/road noise can be expressed as a whole of these factors’ impacts on noise generation mechanisms [4]: · Road surface characteristics: texture, porosity, layer thickness, aggregate properties, stiffness, age, colour etc.
· Environmental factors: temperature, water on road surface, precipitation and wind.
· Driver behavioural factors: driving speed and manoeuvres.
Therefore it was decided to improve and optimise SMA and AC mixtures for noise reduction properties.
Online since: July 2011
Authors: Da Ling Mao, Peng Fei Xue
According to the test results, the main factors influencing the bond behavior between mortars and blocks were analyzed, and the reasonable admixtures amounts were given.
Experimental Study The bond strength between mortars and blocks were affected by many factors.
With orthogonal test, the relationship of four factors: mortar grade, block type, PVB amount, MC amount and bond strength were mainly examined, and four levels of every factor.
The block type was the most important factor to affect the bond strength of specimens.
[2] State Standard of the People's Republic of China: The test standard of basic mechanical properties of masonry GBJ129-90( Beijing 1990), China Architecture & Building Press, in Chinese
Experimental Study The bond strength between mortars and blocks were affected by many factors.
With orthogonal test, the relationship of four factors: mortar grade, block type, PVB amount, MC amount and bond strength were mainly examined, and four levels of every factor.
The block type was the most important factor to affect the bond strength of specimens.
[2] State Standard of the People's Republic of China: The test standard of basic mechanical properties of masonry GBJ129-90( Beijing 1990), China Architecture & Building Press, in Chinese
Online since: July 2020
Authors: Xu Guo Huai, Xiao Wei Fan
However, the wear of the material is a systematic behavior, there are many factors that affect wear behavior, such as the organization of the material, hardness and ambient temperature, external load, and so on.
Where the external load is one of the important factors affecting the wear of the material [10].
Results and Discussion Tribological properties.
Schipper, Effect of microstructure on the tribological and mechanical properties of CuO-doped 3Y-TZP ceramics, J.
Montagnac, Tribological properties of Mo-S-I nanowires as additive in oil, Tribol.
Where the external load is one of the important factors affecting the wear of the material [10].
Results and Discussion Tribological properties.
Schipper, Effect of microstructure on the tribological and mechanical properties of CuO-doped 3Y-TZP ceramics, J.
Montagnac, Tribological properties of Mo-S-I nanowires as additive in oil, Tribol.
Online since: October 2015
Authors: Eckhard Pippel, Manfred Reiche, Martin Kittler, Hans Kosina, Alois Lugstein, Hartmut Uebensee
Electronic properties of dislocations
M.
Measurements on defined dislocation arrays proved numerous exceptional electronic properties.
This indicates that defect engineering moves to single atom treatments and a consequent transition to single electron transistors including the employment of quantum mechanical properties associated to the wave behavior of single excess carriers [2].
These findings demonstrate that dislocations are nanowires having exceptional electronic properties.
Such high strain values cause dramatic changes of the band structure and therefore of the electronic properties.
Measurements on defined dislocation arrays proved numerous exceptional electronic properties.
This indicates that defect engineering moves to single atom treatments and a consequent transition to single electron transistors including the employment of quantum mechanical properties associated to the wave behavior of single excess carriers [2].
These findings demonstrate that dislocations are nanowires having exceptional electronic properties.
Such high strain values cause dramatic changes of the band structure and therefore of the electronic properties.
Online since: June 2020
Authors: Siti Halipah Ibrahim, Abdul Wafi Razali, Nur Fadilah Darmansah, Afzan Ahmad Zaini, Nadia Zaini, Sitti Diana Tamjehi, Gui Hun Chuen
The mechanical properties of concrete such as elastic modulus, peak temperature and strength can be improved by replacing cement with POFA [10]. 30% of cement replacement to POFA in concrete mixture reduced the concrete strength.
The results for 7.5% replacement was slightly higher than 5% was due to environmental factors when conducting the test.
The main factor affecting the mechanical properties of POFA concrete was the particle size of POFA, where finer particle of POFA can increase the compressive strength as compared with the ground ash POFA resulting from chemical reaction of higher Silicon dioxide (SiO2) content [13].
Abubakar, Properties of concrete containing high volume palm oil fuel ash: a short-term investigation, Malaysia.
Sooraj, Effect of palm oil fuel ash (POFA) on strength properties of concrete, Int.
The results for 7.5% replacement was slightly higher than 5% was due to environmental factors when conducting the test.
The main factor affecting the mechanical properties of POFA concrete was the particle size of POFA, where finer particle of POFA can increase the compressive strength as compared with the ground ash POFA resulting from chemical reaction of higher Silicon dioxide (SiO2) content [13].
Abubakar, Properties of concrete containing high volume palm oil fuel ash: a short-term investigation, Malaysia.
Sooraj, Effect of palm oil fuel ash (POFA) on strength properties of concrete, Int.