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Online since: October 2020
Authors: Gia Viet Ngo
Assessment of physical-mechanical and technological properties of the materials was performed according to standard procedures.
The results of testing samples of the material demonstrate a low value of water absorption (30 days - 0.85 %), which positively affects its mechanical properties.
The poor quality of the impregnation of the filler with a highly viscous binder melt leads to a decrease in the mechanical properties of PCM.
By the level of physical and mechanical characteristics, fire hazard properties and heat resistance, these materials fully comply with the requirements for modern thermoplastic PCMs and are not inferior to foreign analogues.
Gu, Factors affecting thermal conductivities of the polymers and polymer composites: A review, Composites Science and Technology. 193 (2020) 108-134
The results of testing samples of the material demonstrate a low value of water absorption (30 days - 0.85 %), which positively affects its mechanical properties.
The poor quality of the impregnation of the filler with a highly viscous binder melt leads to a decrease in the mechanical properties of PCM.
By the level of physical and mechanical characteristics, fire hazard properties and heat resistance, these materials fully comply with the requirements for modern thermoplastic PCMs and are not inferior to foreign analogues.
Gu, Factors affecting thermal conductivities of the polymers and polymer composites: A review, Composites Science and Technology. 193 (2020) 108-134
Online since: February 2008
Authors: B.T. Min, S.W. Hong, J.H. Kim, I.K. Park, H.D. Kim
Dominant Factor for the Occurrence of a Steam Explosion
Dominant Factor for the Occurrence of a Steam Explosion
Dominant Factor for the Occurrence of a Steam Explosion
Dominant Factor for the Occurrence of a Steam Explosion
B.T.
Such accelerated fluid eventually could give a mechanical damage to the structure.
Although it was not clearly proven experimentally what factors affect the fragmentation and triggering for a steam explosion, the main factor that affects film stabilization is the collapse of the film, that is, an intimate contact of the molten fuel with water.
These are related to the inherent thermal properties (melting point, fusion heat, thermal conductivity, heat capacity, viscosity and temperature, etc.) depending on the material composition, and interaction conditions (ambient pressure, external trigger, melt mass and diameter, and noncondensable gas).
A dominant factor for a steam explosion seems to be a material effect.
Such accelerated fluid eventually could give a mechanical damage to the structure.
Although it was not clearly proven experimentally what factors affect the fragmentation and triggering for a steam explosion, the main factor that affects film stabilization is the collapse of the film, that is, an intimate contact of the molten fuel with water.
These are related to the inherent thermal properties (melting point, fusion heat, thermal conductivity, heat capacity, viscosity and temperature, etc.) depending on the material composition, and interaction conditions (ambient pressure, external trigger, melt mass and diameter, and noncondensable gas).
A dominant factor for a steam explosion seems to be a material effect.
Online since: February 2012
Authors: Yan Zhao, Yan Zhang, Fu Cheng Zhang
Effect of orientation relationships on the stiffness and the strength of the dual-phase metals: molecular dynamics simulation
Yan Zhang1,2,a, Yan Zhao1,b and Fucheng Zhang2,c
1 School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, P.
Orientation relationship (OR) is a crucial factor affecting the performance of the phase boundaries and the dual-phase metals.
Orientation relationship (OR) is an important factor for the phase boundaries in metals.
In view of the difficulties of experimental observation, atomic-scale simulation is an important tool for the evaluation of the properties of the micro-structures [4].
Orientation relationship (OR) is a crucial factor affecting the performance of the phase boundaries and the dual-phase metals.
Orientation relationship (OR) is an important factor for the phase boundaries in metals.
In view of the difficulties of experimental observation, atomic-scale simulation is an important tool for the evaluation of the properties of the micro-structures [4].
Online since: October 2020
Authors: Redi Bintarto, Fikrul Akbar Alamsyah, Teguh Dwi Widodo, Rudianto Raharjo
Introduction
Biocompatibility is one of the important properties that implant material must have, including SS316L.
One of the factors that influence biocompatibility of the implant material is the surface roughness of the implant material because it will affect its corrosion resistance and also wettability which will then have an impact on the osseointegration processes, namely direct structural and functional connection between the substance and the surface of inserted material [1,2,3].
Meanwhile, wettability is one of the important properties of an implant material in the process of wound healing and osseointegration.
The sandblasting process not only able to modify the topography of the substrate surface but several studies also reported that sandblasting can modify the mechanical properties of the substrate.
Lu, Tensile properties of a nanocrystalline 316L austenitic stainless steel, Sci.
One of the factors that influence biocompatibility of the implant material is the surface roughness of the implant material because it will affect its corrosion resistance and also wettability which will then have an impact on the osseointegration processes, namely direct structural and functional connection between the substance and the surface of inserted material [1,2,3].
Meanwhile, wettability is one of the important properties of an implant material in the process of wound healing and osseointegration.
The sandblasting process not only able to modify the topography of the substrate surface but several studies also reported that sandblasting can modify the mechanical properties of the substrate.
Lu, Tensile properties of a nanocrystalline 316L austenitic stainless steel, Sci.
Online since: February 2011
Authors: Qiang Zhang, Qiu Shuang Song
In the complete exploitation of coal plough equipment is mainly application three types by the geological conditions, physical and mechanical properties of coal conditions, drag hook-type coal plough, skidding-type coal plough, compact skidding-type coal plough.The author application gray connection decision method, it carries on decompose to multi-ranks forthere ways, and it carries on multi-layer decomposition to each rank, it used the entropy value law to determined that each rank weight value, it calculates total membership function for different way, it has established the gray connection decision model for coal plough equipment way, The model reduced subjective factor influence, and the coal plough equipment plan be provided powerful theory support.
Fuzzy judgment strategy based on grey theory The fuzzy judgment is total appraisal of phenomenon which involves fuzzy factors .The factor dynamic development momentum similar degree with the interrelatedness.
Consider the influence of all factors, it descried the i line of R from the factor judgment, the each degree of select element ith depend on the influence judgment object of factor and the j line of R , the degree of prepare selects element of the jth depend on the object of influence judgment of all factor, therefore can used the sum of available each row element: Reflecting the synthesis influence of all factor, but did not consider the important degree of each factor,If also consider the weight number of each corresponding factor, then can reflect the synthesis influence of all factor reasonably.
The fuzzy synthesis judgment of mining equipment of affect was appointed 2-level in this article.
(2) To affects The coal plough equipment 5 aspects, 18 factors carryed on division, used entropy value law to calculate degree of membership, it has established multi-level fuzzy gray connection decision model.
Fuzzy judgment strategy based on grey theory The fuzzy judgment is total appraisal of phenomenon which involves fuzzy factors .The factor dynamic development momentum similar degree with the interrelatedness.
Consider the influence of all factors, it descried the i line of R from the factor judgment, the each degree of select element ith depend on the influence judgment object of factor and the j line of R , the degree of prepare selects element of the jth depend on the object of influence judgment of all factor, therefore can used the sum of available each row element: Reflecting the synthesis influence of all factor, but did not consider the important degree of each factor,If also consider the weight number of each corresponding factor, then can reflect the synthesis influence of all factor reasonably.
The fuzzy synthesis judgment of mining equipment of affect was appointed 2-level in this article.
(2) To affects The coal plough equipment 5 aspects, 18 factors carryed on division, used entropy value law to calculate degree of membership, it has established multi-level fuzzy gray connection decision model.
Online since: December 2010
Authors: De Jun Kong, Chao Zheng Zhou
The service condition of pipeline is mostly moist soil and in desert environment, and transport medium contains more H2S and other acidic substances, and corrosion is the key factor of affecting the reliability of piping system and the service life [2], because in the high-pressure pipeline welded parts, especially the laying of pipeline welded part which is the accident-prone location of failure.
Residual stress caused by welding has a significant impact on the mechanical properties, high residual tensile stress can lead to cracks within the structure, reduce tensile strength and fatigue strength [3].
Micro-hardness is a widely used mechanical property, that is token of plastic deforming resistance of materials and the capacity of strain hardening.
The results shown that the surface micro-hardness of the sample by laser shock processing had increased from 220~235HV to 250~265HV, the strengthened layer is formed in the surface of welded joint, so that the hardness of welded zone, fusion zone and heat-affected zone has risen markedly, which would help to improve the mechanical properties of welded joint.
Ji and et al: Chinese Journal of Mechanical Engineering Vol. 43 (2007), p. 154 [6] D.P.
Residual stress caused by welding has a significant impact on the mechanical properties, high residual tensile stress can lead to cracks within the structure, reduce tensile strength and fatigue strength [3].
Micro-hardness is a widely used mechanical property, that is token of plastic deforming resistance of materials and the capacity of strain hardening.
The results shown that the surface micro-hardness of the sample by laser shock processing had increased from 220~235HV to 250~265HV, the strengthened layer is formed in the surface of welded joint, so that the hardness of welded zone, fusion zone and heat-affected zone has risen markedly, which would help to improve the mechanical properties of welded joint.
Ji and et al: Chinese Journal of Mechanical Engineering Vol. 43 (2007), p. 154 [6] D.P.
Online since: October 2010
Authors: Long Fei Liu, Jing Hu, Hui Qiang Li, Guang Ye Zhang
In addition, normal stress is the major factor of inducing multiple shear bands with intersecting, branching and slipping.
Introduction Recently, bulk metallic glasses (BMGs) have attracted large interest due to their unique physical, mechanical, and chemical properties [1-5].
Many macroscopic mechanical properties (e.g. plasticity and ductility) are thus controlled by the individual and collective behaviors of the shear bands.
Mechanical tests In order to conduct shear test with controlled normal stress, A special fixture was machined, which is shown in Fig.1.
In addition, normal stress is the major factor of inducing multiple shear bands with intersecting, branching and slipping.
Introduction Recently, bulk metallic glasses (BMGs) have attracted large interest due to their unique physical, mechanical, and chemical properties [1-5].
Many macroscopic mechanical properties (e.g. plasticity and ductility) are thus controlled by the individual and collective behaviors of the shear bands.
Mechanical tests In order to conduct shear test with controlled normal stress, A special fixture was machined, which is shown in Fig.1.
In addition, normal stress is the major factor of inducing multiple shear bands with intersecting, branching and slipping.
Online since: January 2015
Authors: Wei Jun Xu, Xiao Tian Wang, Qi Xing Guo
Fig.1 Finite element model
Fig.2 Geometrical dimension
Fig.3 Variation trend of stress
concentration factor
Fig.4 Stress concentration factor of
elliptical corrosion
Stress concentration factors of hemispherical pitting corrosion fluctuate strongly due to the variation of stress distribution caused by changing depth of pitting corrosion.
Fatigue notch factor Kf depends on theoretical stress concentration factor, material property, and type of load, etc.
The continuous change of the structure’s local size caused by corrosion will affect stress level of the shell structure near to the corrosive area and further the fatigue performance of structure.
The formula given in literature [5] has some practical value in estimating corrosion fatigue properties of spherical-headed cylindrical shell.
Mechanical Strength.2005,27(6):821~824
Fatigue notch factor Kf depends on theoretical stress concentration factor, material property, and type of load, etc.
The continuous change of the structure’s local size caused by corrosion will affect stress level of the shell structure near to the corrosive area and further the fatigue performance of structure.
The formula given in literature [5] has some practical value in estimating corrosion fatigue properties of spherical-headed cylindrical shell.
Mechanical Strength.2005,27(6):821~824
Online since: February 2026
Authors: Nabel Kadum Abd-Ali, Ahmed Raee Madeh, Mohsen M. Mahdi Sherazi
The material properties were chosen for this analysis is carbon/epoxy.
[7] Abd-Ali, N.K., Madeh, A.R., Experimental and Numerical Investigation of Factors That Affecting in Frictional Welding of Mild Steel and Al alloy A356, ICOASE 2018 - International Conference on Advanced Science and Engineering, 2018, pp. 456–461, 8548940
Improvement of mechanical properties of the rubbery part in cement packing system using new rubber materials.
[14] Abd-Ali, N.K., The Effect of Adding Nanoparticles on the Mechanical Properties of Acrylic Removable Denture, Journal of Engineering Science and Technology, 2022, 17(4), pp. 2983–2996
State-of-the-art review of fabrication, application, and mechanical properties of functionally graded porous nanocomposite materials.
[7] Abd-Ali, N.K., Madeh, A.R., Experimental and Numerical Investigation of Factors That Affecting in Frictional Welding of Mild Steel and Al alloy A356, ICOASE 2018 - International Conference on Advanced Science and Engineering, 2018, pp. 456–461, 8548940
Improvement of mechanical properties of the rubbery part in cement packing system using new rubber materials.
[14] Abd-Ali, N.K., The Effect of Adding Nanoparticles on the Mechanical Properties of Acrylic Removable Denture, Journal of Engineering Science and Technology, 2022, 17(4), pp. 2983–2996
State-of-the-art review of fabrication, application, and mechanical properties of functionally graded porous nanocomposite materials.
Online since: January 2016
Authors: Agus Sunjarianto Pamitran, Nasruddin Nasruddin, Sentot Novianto, T.A. Simanjuntak, Muhammad Idrus Alhamid
This study also investigated which fluid properties gave higher effect on the frictional pressure drop due to its change over the process based on the recent experiment data.
This study also investigated which fluid properties gave higher effect on the frictional pressure drop due to its change over the process.
Increasing the heat flux will raise the fluid temperature which causes changing of fluid properties such as density and viscosity.
This work also clearly showed the influence of fluid properties which were changing during heating such as fluid density and viscosity.
The result showed that the fluid viscousity is more dominant affecting the frictional pressure drop.
This study also investigated which fluid properties gave higher effect on the frictional pressure drop due to its change over the process.
Increasing the heat flux will raise the fluid temperature which causes changing of fluid properties such as density and viscosity.
This work also clearly showed the influence of fluid properties which were changing during heating such as fluid density and viscosity.
The result showed that the fluid viscousity is more dominant affecting the frictional pressure drop.