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Online since: August 2024
Authors: Fereidoon Moghadas Nejad, Sepehr Ghafari
Nguyen and Len [3] conducted a study on the mechanical properties of AC mixtures with varying levels of sulfur modification, finding improvements in both Marshall stability and rutting resistance.
In designing durable AC pavement layers for cold regions, understanding the fracture properties of these mixtures is crucial.
For instance, Kim and El Hossein [5] were among the first to assess fracture properties using the classical concept of fracture toughness.
These factors challenge the reliability of fracture energy as the sole metric for assessing low-temperature performance.
The physical properties of the aggregate are detailed in Table 1.
In designing durable AC pavement layers for cold regions, understanding the fracture properties of these mixtures is crucial.
For instance, Kim and El Hossein [5] were among the first to assess fracture properties using the classical concept of fracture toughness.
These factors challenge the reliability of fracture energy as the sole metric for assessing low-temperature performance.
The physical properties of the aggregate are detailed in Table 1.
Online since: October 2020
Authors: Anatoly G. Davidovsky
The Use of Polymers in Dental Implantology
The prospects of using the considered coatings based on silicon compounds are determined by their dielectric properties, amorphous state that contributes to the healing of microcracks of the surface layer, the formation of a surface with improved hydrophilic properties, and optimal physical and mechanical characteristics.
It became possible to reasonably raise the issue of aging and stabilization of polymers as a multi-factor problem, where the study of changes in the properties of a polymer matherial under different conditions can be considered from a single point of view.
Therefore, the properties of a polymer matherial with a large molecular weight can be more stable.
Titanium alloys, as matherials with acceptable (but flawed) corrosion and corrosion-mechanical properties for these purposes, are widely used in implantation surgery.
It was found that polyurethanes with a simple etheric bond were more affected than polyurethanes with a complex etheric bond.
It became possible to reasonably raise the issue of aging and stabilization of polymers as a multi-factor problem, where the study of changes in the properties of a polymer matherial under different conditions can be considered from a single point of view.
Therefore, the properties of a polymer matherial with a large molecular weight can be more stable.
Titanium alloys, as matherials with acceptable (but flawed) corrosion and corrosion-mechanical properties for these purposes, are widely used in implantation surgery.
It was found that polyurethanes with a simple etheric bond were more affected than polyurethanes with a complex etheric bond.
Online since: July 2024
Authors: Rana Rabnanwaz Ahmed, Syed Muhammad Shahrukh Ali
They explored the material properties and physical responses, and recorded in the result whether the material is resistant to flood damage or not [4].
Furthermore, it suggests the criteria of using building material that causes minimal damage to the physical and mechanical properties, when checked before and after the flood event.
Moreover, they specify the individual testing of properties to assess the capacity of a material [4].
No Criteria Explanation 1 Durability Standing under flooding without loss of shape. 2 Mechanical Properties Bonding, compressive strengths, tensile strength, modulus etc. 3 Physical Properties Appearance, texture, color, moisture, cracking, etc. 4 Erosion-Resistant Progressive loss from the original state. 5 Impermeability Ability to resist pervasion.
It is notable, that the studies presented in literature review does not incorporate the holistic approach and does not consider the economic and financial factors in their studies.
Furthermore, it suggests the criteria of using building material that causes minimal damage to the physical and mechanical properties, when checked before and after the flood event.
Moreover, they specify the individual testing of properties to assess the capacity of a material [4].
No Criteria Explanation 1 Durability Standing under flooding without loss of shape. 2 Mechanical Properties Bonding, compressive strengths, tensile strength, modulus etc. 3 Physical Properties Appearance, texture, color, moisture, cracking, etc. 4 Erosion-Resistant Progressive loss from the original state. 5 Impermeability Ability to resist pervasion.
It is notable, that the studies presented in literature review does not incorporate the holistic approach and does not consider the economic and financial factors in their studies.
Online since: December 2013
Authors: Yong Cheng Guo, Jin Long Guo
Engineered Slope is formed by artificial transformation or affected by the project.
Slope stability is directly related to the safety of the plant, even affecting the safe operation of power station.
In the actual operation process, it involves many qualitative and quantitative factors and engineering experience and expert knowledge, essentially it is a comprehensive system of systems engineering and knowledge engineering.
The ways to transfer or reduce the risk can be implemented by engineering and non-engineering measures is obtained, which has a certain application value to determine the main factors influencing the slope stability and take appropriate measures.
[4]Zhou Huoming,Sheng Qian,Li Weishu.Excavation-disturbed zone and weaken degree of mechanical properties for rockmass of tgp shiplock slope[J].
Slope stability is directly related to the safety of the plant, even affecting the safe operation of power station.
In the actual operation process, it involves many qualitative and quantitative factors and engineering experience and expert knowledge, essentially it is a comprehensive system of systems engineering and knowledge engineering.
The ways to transfer or reduce the risk can be implemented by engineering and non-engineering measures is obtained, which has a certain application value to determine the main factors influencing the slope stability and take appropriate measures.
[4]Zhou Huoming,Sheng Qian,Li Weishu.Excavation-disturbed zone and weaken degree of mechanical properties for rockmass of tgp shiplock slope[J].
Online since: April 2015
Authors: Xue Dong Chen, Yi Chun Han, Zhi Chao Fan, Yu Zhou
The property difference is mainly caused by vanadium through fine grain strengthening and precipitation strengthening.
Meanwhile, creep deformation and fracture behavior of metallic materials at elevated temperatures are generally key factors for the design life of high temperature components.
For simplicity, a part of the geometrical model is selected without affecting the calculation results, i.e., the distance from the loading end to the notch is 3R.
Meanwhile, the multi-axial stress state around the notch affects damage accumulation.
Secondly, the multi-axial constraint affects the material toughness [7].
Meanwhile, creep deformation and fracture behavior of metallic materials at elevated temperatures are generally key factors for the design life of high temperature components.
For simplicity, a part of the geometrical model is selected without affecting the calculation results, i.e., the distance from the loading end to the notch is 3R.
Meanwhile, the multi-axial stress state around the notch affects damage accumulation.
Secondly, the multi-axial constraint affects the material toughness [7].
Online since: February 2009
Authors: J.O. Osarenmwinda, A.O. Awaro
The properties of concrete made with periwinkle shell as coarse aggregate were examined.
Concrete is one of the major components of any building and its production cost will go a long way in affecting the overall cost of building project.
A.M Neville "properties of concrete".
"Effects of ground hazelnut,wood and tea waste on the the mechanical properties of cement. " Cement and concrete Research 28(8): 1101-104(1998) 9.
Shameem,M Ibrahim,M .S Barry " Comparison of properties of steel slag and crushed limestone aggregate concretes".
Concrete is one of the major components of any building and its production cost will go a long way in affecting the overall cost of building project.
A.M Neville "properties of concrete".
"Effects of ground hazelnut,wood and tea waste on the the mechanical properties of cement. " Cement and concrete Research 28(8): 1101-104(1998) 9.
Shameem,M Ibrahim,M .S Barry " Comparison of properties of steel slag and crushed limestone aggregate concretes".
Online since: July 2011
Authors: Xiao Hua Gu, Jia Liang Zhou, Jian Hong Liu
Introduction:
Polymer Nanocomposites develop rapidly in recent years, nanomaterials add in nanocomposite materials will affect the crystallization behavior of materials, thus affecting the processing properties of the material.[1]
At the same time the crystallization process is a key factor to decide the structure of crystalloid and the degree of crystallinity in the forming process, different polymer structure will affect crystallization ability and crystallization speed, while the structure of crystalloid and the degree of crystallinity decide the meterial’s physical, chemical and mechanical properties.
(2.2) In the formula Xc is relative crystallinity at time t, Zt is kinetic constants, n is Avrami Index,it is about with nucleation and the process of growth,then on(formula2.2) logarithmic: (2.3) Jeziorny[5] directly applied Avrami equation to the analyze constant temperature DSC curves .Taking into account the non-isothermal nature of the polymer, the cooling rate R as a correction factor and characterize non-isothermal crystallization kinetics parameters Zc
This is because the nano-particles unique pore structure of the nano-scale powders and its nano-size effect, increasing its enthalpy and the crystallization of the polymer properties and contributing to crystallization rate.
The optical properties and the nucleation behavior of the PET/SiO2nano-composite materials[J].Polymer Materials Science and Engineering, 2007,7(23):94-98.In Chinese
Effect of modified clay on the crysyallization property of PET/clay nanocomposites[J].Jounal of China University Mining and Technology, 2007,9(36):701-706.
(2.2) In the formula Xc is relative crystallinity at time t, Zt is kinetic constants, n is Avrami Index,it is about with nucleation and the process of growth,then on(formula2.2) logarithmic: (2.3) Jeziorny[5] directly applied Avrami equation to the analyze constant temperature DSC curves .Taking into account the non-isothermal nature of the polymer, the cooling rate R as a correction factor and characterize non-isothermal crystallization kinetics parameters Zc
This is because the nano-particles unique pore structure of the nano-scale powders and its nano-size effect, increasing its enthalpy and the crystallization of the polymer properties and contributing to crystallization rate.
The optical properties and the nucleation behavior of the PET/SiO2nano-composite materials[J].Polymer Materials Science and Engineering, 2007,7(23):94-98.In Chinese
Effect of modified clay on the crysyallization property of PET/clay nanocomposites[J].Jounal of China University Mining and Technology, 2007,9(36):701-706.
Online since: February 2015
Authors: Qian Cheng, Jing Chen, Shun Quan Chen
Membrane properties were characterized by means of FT-IR, SEM and Contact Angle Meter.
The amount of HFBA had significantly effects on the film properties.
Thus, its membrane properties are greatly enhanced by this solvent-free emulsion polymerization in a single step.
Surface energy and surface roughness are the dominant factors that influence the performance of the surface property [5].
The amount of HFBA had significantly effects on the film properties.
The amount of HFBA had significantly effects on the film properties.
Thus, its membrane properties are greatly enhanced by this solvent-free emulsion polymerization in a single step.
Surface energy and surface roughness are the dominant factors that influence the performance of the surface property [5].
The amount of HFBA had significantly effects on the film properties.
Online since: July 2020
Authors: Tomasz Tański, Przemysław Snopiński, Maciej Wiśniowski
Titanium alloys due to their low density and high mechanical properties are a group of materials that are being used willingly nowadays.
Fast cooling of the molten material allows obtaining a surface layer with mechanical, physical and chemical properties other than in the base material, often also guaranteeing the improvement of the mechanical properties of the sample.
Laser texturing allows to modify the properties of the surface layer without affecting the chemical composition of the substrate material.
Liu, Microstructural evolution and mechanical properties of Ti–Zr beta titanium alloy after laser surface remelting.
Liu, Multi-scale microstructural development and mechanical properties of a selectively laser melted beta titanium alloy, Addit.
Fast cooling of the molten material allows obtaining a surface layer with mechanical, physical and chemical properties other than in the base material, often also guaranteeing the improvement of the mechanical properties of the sample.
Laser texturing allows to modify the properties of the surface layer without affecting the chemical composition of the substrate material.
Liu, Microstructural evolution and mechanical properties of Ti–Zr beta titanium alloy after laser surface remelting.
Liu, Multi-scale microstructural development and mechanical properties of a selectively laser melted beta titanium alloy, Addit.
Online since: February 2024
Authors: Takeshi Gonda, Masaki Yakabe, Yasutaka Hayamizu, Shinichi Morita, Toshihiko Kawabe, Kento Nishinaka
Mechanical Design Using Open-Source Software (Eigenvalue Analysis by Parametric Study)
Takeshi GONDA1,a*, Masaki YAKABE1,b, Yasutaka HAYAMIZU1,c,
Shin-ichi MORITA2,d, Toshihiko KAWABE3,e and Kento NISHINAKA3,f
1Department of Integrated Engineering (Mechanical Systems Division), National Institute of Technology (KOSEN), Yonago College, 4448, Hikona-cho Yonago City, Tottori, 683-8502, Japan
2Division of Mechanical and Electrical Engineering, Faculty of Engineering, Kitami Institute of Technology, 165 Koen-cyo, Kitami City, Hokkaido, 090-8507, Japan
3Tsurumi Manufacturing Co., Ltd., 2700, Yomi-cho,Yonago City, Tottori, 683-0851, Japan
at-gonda@yonago-k.ac.jp, byakabe@yonago-k.ac.jp, chayamizu@yonago-k.ac.jp,
ds-morita@mail.kitami-it.ac.jp, etoshihiko_kawabe@tsurumipump.co.jp, fkento_nishinaka@tsurumipump.co.jp
Keywords: open-source software, numerical analysis, parametric study, FEM
Abstract.
To overcome this challenge, open-source CAE software (hereafter “open CAE software”) can be used for product development because CAE systems comprise open-source structural analysis software and mesh creation tools that do not require extensive deployment costs and achieve the same functionality as standard commercial CAE software without being limited by economic factors; this means that parallel calculations and multitasking can exist simultaneously[1].
Other than the beam length, the dimensions and physical properties of the mesh were fixed, and a hexahedral quadratic element, which was a cube of H5×B5×l5 mm was used for the mesh.
The analysis was executed on the first-order mode results, and the dimensions and physical properties were calculated using the same values as those in previous section, except for the rib thickness.
Based on the above, we can see that the pipe thickness affects the eigenfrequency by up to 10% under the current conditions.
To overcome this challenge, open-source CAE software (hereafter “open CAE software”) can be used for product development because CAE systems comprise open-source structural analysis software and mesh creation tools that do not require extensive deployment costs and achieve the same functionality as standard commercial CAE software without being limited by economic factors; this means that parallel calculations and multitasking can exist simultaneously[1].
Other than the beam length, the dimensions and physical properties of the mesh were fixed, and a hexahedral quadratic element, which was a cube of H5×B5×l5 mm was used for the mesh.
The analysis was executed on the first-order mode results, and the dimensions and physical properties were calculated using the same values as those in previous section, except for the rib thickness.
Based on the above, we can see that the pipe thickness affects the eigenfrequency by up to 10% under the current conditions.