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Online since: June 2025
Authors: Štefan Dunaj, Jan Rybář, Peter Onderčo, Andrej Smetánka, Jozef Leja
It features properties that enable measurement and testing across various pressure parameters, with particular emphasis on the selection of appropriate materials
Additionally, the artificial model eye can simulate other factors that may influence the accuracy of measurements related to the monitored parameters
A numerical model as a basis for the construction of a new standards device with a model eye (ideal eye) and cornea was created with respect to their geometric and physical properties [7, 8, 9].
Factors affecting measurements of IOP using non-contact eye tonometer.
Glaucoma vs. biomechanical properties of cornea.
Additionally, the artificial model eye can simulate other factors that may influence the accuracy of measurements related to the monitored parameters
A numerical model as a basis for the construction of a new standards device with a model eye (ideal eye) and cornea was created with respect to their geometric and physical properties [7, 8, 9].
Factors affecting measurements of IOP using non-contact eye tonometer.
Glaucoma vs. biomechanical properties of cornea.
Online since: March 2014
Authors: Gang Tian Chen
The design is verified and completed with performance tests, which finally show that the dynamic property of the engine is increased and its economy of is improved.
Besides, the compression ratio is comparatively low after supercharged so as to decrease the highest combustion pressure, reduce mechanical load and finally increase engine power.
Knocking combustion The abnormal combustion of gas in cylinder is mainly reflected by knocking combustion, which is mostly affected by factors like methane content, density of gas mixture, compression ratio, input air temperature, ignition energy, etc.
Besides, if the compression ratio is appropriate and the input air is lower than certain value, there will be no knocking combustion; if the excessive air factor is 1.2, knocking combustion is easy to occur; if the excessive air factor is over 1.5, the knocking combustion will occur at any temperature.
Select and estimation of supercharging parameters By investigating overseas turbo gas engine and combining the development experience of T190 series natural aspirating gas engine, the main thermal parameters affecting supercharging performance can be analyzed and estimated (omitted in this paper) to strictly control the adverse factors so as to achieve the supercharging effect.
Besides, the compression ratio is comparatively low after supercharged so as to decrease the highest combustion pressure, reduce mechanical load and finally increase engine power.
Knocking combustion The abnormal combustion of gas in cylinder is mainly reflected by knocking combustion, which is mostly affected by factors like methane content, density of gas mixture, compression ratio, input air temperature, ignition energy, etc.
Besides, if the compression ratio is appropriate and the input air is lower than certain value, there will be no knocking combustion; if the excessive air factor is 1.2, knocking combustion is easy to occur; if the excessive air factor is over 1.5, the knocking combustion will occur at any temperature.
Select and estimation of supercharging parameters By investigating overseas turbo gas engine and combining the development experience of T190 series natural aspirating gas engine, the main thermal parameters affecting supercharging performance can be analyzed and estimated (omitted in this paper) to strictly control the adverse factors so as to achieve the supercharging effect.
Online since: January 2010
Authors: Christof Sommitsch, Martin Stockinger, Daniel Huber
During hot working of the recently developed nickel based alloy Allvac 718Plus
TM
softening kinetics like dynamic, metadynamic as well as static recrystallization govern the
microstructure evolution during and after hot forming and hence the final mechanical properties.
The further developed grade Allvac 718PlusTM shall enhance the high temperature properties [3] that are attributed to the combined effects of chemistry, heat treatment as well as microstructure.
For the production of turbine disks subsequently a complex multi step thermo mechanical process on a hydraulic or screw press is used in order to meet the tight geometrical, mechanical and microstructure specifications of the engine producers.
The influencing factors on the recrystallization processes are the following: While strain rate and temperature are the main affecting process conditions for DRX and MDRX, initial grain size and accumulated strain additionally govern the SRX process [8].
The recrystallization kinetics was studied by use of double-hit compression tests under isothermal conditions at constant true strain rates at a Servotest thermo-mechanical treatment simulator (TMTS).
The further developed grade Allvac 718PlusTM shall enhance the high temperature properties [3] that are attributed to the combined effects of chemistry, heat treatment as well as microstructure.
For the production of turbine disks subsequently a complex multi step thermo mechanical process on a hydraulic or screw press is used in order to meet the tight geometrical, mechanical and microstructure specifications of the engine producers.
The influencing factors on the recrystallization processes are the following: While strain rate and temperature are the main affecting process conditions for DRX and MDRX, initial grain size and accumulated strain additionally govern the SRX process [8].
The recrystallization kinetics was studied by use of double-hit compression tests under isothermal conditions at constant true strain rates at a Servotest thermo-mechanical treatment simulator (TMTS).
Online since: April 2013
Authors: K. Emre Öksüz, Y. Şahin
The dry sliding wear of materials is influenced by many factors such as properties of materials, operating conditions, geometry of wearing bodies and environmental conditions [2, 3 and 4].
Some mechanical and physical properties of Al2124 alloy and it’s composite Types of materials and their designations Weight fraction (wt. %) Density (Kg/m3) Rockwell B Hardness (HRB) Al2124 alloy 100wt.% 2520 44.2 Al2124 alloy+15wt.
The effects of the control factors are shown in Fig.1 for S/N ratio.
Thus, these two factors are neglected.
Correlation of abrasive wear with microstructure and mechanical properties of pressure die-cast aluminum hard-particle composite, Metallur.
Some mechanical and physical properties of Al2124 alloy and it’s composite Types of materials and their designations Weight fraction (wt. %) Density (Kg/m3) Rockwell B Hardness (HRB) Al2124 alloy 100wt.% 2520 44.2 Al2124 alloy+15wt.
The effects of the control factors are shown in Fig.1 for S/N ratio.
Thus, these two factors are neglected.
Correlation of abrasive wear with microstructure and mechanical properties of pressure die-cast aluminum hard-particle composite, Metallur.
Online since: May 2015
Authors: Stanislav Němeček, Jan Kašpar
The microstructure and mechanical properties of the resulting welds were examined.
Conventional arc welding methods applied to CP steels lead to wide heat-affected zones (HAZ) and degrade the properties of the base material [1].
The laser beam itself and the application of high welding speeds would reduce the heat input, one of the main factors governing the properties of welds.
Fatigue curves in Fig. 7 show that the A-series specimens possess considerably better fatigue properties.
Fatigue tests demonstrated better fatigue properties of the A-series specimens.
Conventional arc welding methods applied to CP steels lead to wide heat-affected zones (HAZ) and degrade the properties of the base material [1].
The laser beam itself and the application of high welding speeds would reduce the heat input, one of the main factors governing the properties of welds.
Fatigue curves in Fig. 7 show that the A-series specimens possess considerably better fatigue properties.
Fatigue tests demonstrated better fatigue properties of the A-series specimens.
Online since: January 2025
Authors: Zeenat Khan, Majid Ali
The performance of concrete is of paramount importance for the structural longevity, relying on numerous factors [7].
Luhar, Effect of wastewater on properties of concrete, J.
Zhutovsky, The effect of external curing methods on the development of mechanical and durability-related properties of normal-strength concrete, Constr.
Wu, Factors affecting the effectiveness of internal curing: A review, Constr.
Xi, Influence of wastewater content on mechanical properties, microstructure, and durability of concrete, Build. 12 (2022) 1343
Luhar, Effect of wastewater on properties of concrete, J.
Zhutovsky, The effect of external curing methods on the development of mechanical and durability-related properties of normal-strength concrete, Constr.
Wu, Factors affecting the effectiveness of internal curing: A review, Constr.
Xi, Influence of wastewater content on mechanical properties, microstructure, and durability of concrete, Build. 12 (2022) 1343
Online since: September 2017
Authors: Mohd Raihan Taha, Ramez A. Al-Mansob, Tanveer Ahmed Khan, Jamal M.A. Alsharef
They investigated the influence of carbon nanotubes (CNT) on the mechanical properties of stabilized soil.
The obtained results indicated that a very small content of CNT improved the mechanical properties of a soil chemically stabilized with cement.
Table 4 summarizes these factors along with their values.
Dehkhodarajabi, Effect of graphene oxide nanosheets on the geotechnical properties of cemented silty soil, Archives of Civil and Mechanical Engineering 16(4) (2016) 695-701
Gun’ko, Small but strong: a review of the mechanical properties of carbon nanotube–polymer composites, Carbon 44(9) (2006) 1624-1652
The obtained results indicated that a very small content of CNT improved the mechanical properties of a soil chemically stabilized with cement.
Table 4 summarizes these factors along with their values.
Dehkhodarajabi, Effect of graphene oxide nanosheets on the geotechnical properties of cemented silty soil, Archives of Civil and Mechanical Engineering 16(4) (2016) 695-701
Gun’ko, Small but strong: a review of the mechanical properties of carbon nanotube–polymer composites, Carbon 44(9) (2006) 1624-1652
Online since: June 2005
Authors: Hui Qi Xie, Xiu Qun Li, Kailu Liang, Zhi Ming Yang, Ting Wu Qin
Actually, mechanical stress is an important stimulation factor from
outside, which influence growth and function of fibroblasts [1].
The mechanical properties of tendon mainly base on the tissue-specific three-dimensional structure, while the organization of three-dimensional structure that possesses specific shape and function, benefits from the extrinsic mechanical strain.
Two scaffolds were fastened to one holder of the culture flask, and one of them was affected by strain, while the other moved periodically without strain.
It is conceivable that the surface properties and pore structure of the scaffolds influenced the adhesion properties of tenocytes[5] and eventually also influence the morphological change of cells Cell Proliferation and DNA Synthesis.
Triantafillopoulos et al[6] discovered load acted synergistically to increase matrix remodeling and biomechanical properties of bioartificial tendons..
The mechanical properties of tendon mainly base on the tissue-specific three-dimensional structure, while the organization of three-dimensional structure that possesses specific shape and function, benefits from the extrinsic mechanical strain.
Two scaffolds were fastened to one holder of the culture flask, and one of them was affected by strain, while the other moved periodically without strain.
It is conceivable that the surface properties and pore structure of the scaffolds influenced the adhesion properties of tenocytes[5] and eventually also influence the morphological change of cells Cell Proliferation and DNA Synthesis.
Triantafillopoulos et al[6] discovered load acted synergistically to increase matrix remodeling and biomechanical properties of bioartificial tendons..
Online since: June 2015
Authors: Xiao Hui Song, Hua Dong Zhao, Ji Bin Liu
However, until now most previous studies have focused on the dramatic contact resistance reduction to demonstrate the effectiveness of the bonding methods without paying attention to the effect of the mechanical properties of the interfacial configuration.
Computer simulations provide powerful methods to investigate the structural and dynamical properties of the interfaces, which otherwise are very difficult to study by means of experiments.
To identify factors affecting the bonding strength and failure modes, bonding processes under various temperatures are considered.
Debonding process In order to examine the mechanical properties and the failure modes during debonding process, tensile loading is applied at 300 K by fixing one end of the Ni slab and moving three layers of C atoms in the Z direction, as shown in Fig. 4.
The temperature is a key factor to increase the contact length.
Computer simulations provide powerful methods to investigate the structural and dynamical properties of the interfaces, which otherwise are very difficult to study by means of experiments.
To identify factors affecting the bonding strength and failure modes, bonding processes under various temperatures are considered.
Debonding process In order to examine the mechanical properties and the failure modes during debonding process, tensile loading is applied at 300 K by fixing one end of the Ni slab and moving three layers of C atoms in the Z direction, as shown in Fig. 4.
The temperature is a key factor to increase the contact length.
Online since: June 2011
Authors: Jin Shan Li, Bin Tang, Hui Chang, Zhi Shou Zhu, Zhong Bo Zhou, Yue Fei, Lian Zhou, Guo Qiang Shang
The mechanical properties of metastable β titanium alloys can be improved by grain refining and much attention has recently been paid to the grain refining by dynamic recrystallization during hot deformation processing [5-7].
The β grain size is affected by the heat treated temperature and time, consequently affect the mechanical properties of metastable β titanium alloys [8,9].
The n value for β phases in pure Ti was reported to be about 0.5 [13], while the n value for a fine-grained, hot-rolled TB-13 alloy is less than 0.5 due to the role played by various factors affecting the β grain growth kinetics.
The lower β grain growth activation energy for as-rolled metastable β titanium alloy may be attributed to two factors.
The n value for a fine-grained, hot-rolled TB-13 alloy is less than 0.5 due to the role played by texture and solute drag effect affecting the β grain growth kinetics. 3) The activation energy for β grain growth Qm is around 156 KJ/mol for the temperature in the range of 1103K-1203K.
The β grain size is affected by the heat treated temperature and time, consequently affect the mechanical properties of metastable β titanium alloys [8,9].
The n value for β phases in pure Ti was reported to be about 0.5 [13], while the n value for a fine-grained, hot-rolled TB-13 alloy is less than 0.5 due to the role played by various factors affecting the β grain growth kinetics.
The lower β grain growth activation energy for as-rolled metastable β titanium alloy may be attributed to two factors.
The n value for a fine-grained, hot-rolled TB-13 alloy is less than 0.5 due to the role played by texture and solute drag effect affecting the β grain growth kinetics. 3) The activation energy for β grain growth Qm is around 156 KJ/mol for the temperature in the range of 1103K-1203K.