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Online since: July 2017
Authors: Arne Breede, Frédéric Pascon, Arjen Kolovaar, Tom van Eekelen, Maarten Bach, Christian Brauner
In NX CAE also interfaces and mapping algorithm have been developed to read information’s like filling factors from RTMWorx.
First, the basic engineering properties have been derived with standard tensile tests (DIN ISO 527-3) as a starting point for the structural design of the component.
All thermal properties of the material (heat capacity, orthotropic conductivity) can then be defined as temperature and degree of cure dependent functions.
The stiffness properties of the fibers and the resin matrix are defined separately and they depend on the degree of cure X (matrix only) and on the temperature T.
Material properties such as viscosity and permeability have been analysed and are used as input for the simulations.
First, the basic engineering properties have been derived with standard tensile tests (DIN ISO 527-3) as a starting point for the structural design of the component.
All thermal properties of the material (heat capacity, orthotropic conductivity) can then be defined as temperature and degree of cure dependent functions.
The stiffness properties of the fibers and the resin matrix are defined separately and they depend on the degree of cure X (matrix only) and on the temperature T.
Material properties such as viscosity and permeability have been analysed and are used as input for the simulations.
Online since: October 2011
Authors: Bei Zhu, Jun Xiao, Ji Hua Liao
In order to guide the reservoir evaluation and hydrocarbon exploration of study area, it is therefore necessary to determine how high temperature and overpressure affect the physical properties of reservoir and their influence degrees.
Effects of High Temperature and Overpressure on Deep Reservoir The physical properties of deep reservoir in Qiongdongnan basin are not only doubly controlled by sedimentation (including grain size, sorting features, compositions) and diagenesis (e.g., compaction, cementation, and dissolution), but also profoundly affected by high temperature and overpressure.
Effects of High Temperature on Deep Reservoir Physical Properties.
The most important impact of high temperature on reservoir physical properties lies in accelerating the decrease of primary pores.
Effects of Overpressure on Deep Reservoir Properties.
Effects of High Temperature and Overpressure on Deep Reservoir The physical properties of deep reservoir in Qiongdongnan basin are not only doubly controlled by sedimentation (including grain size, sorting features, compositions) and diagenesis (e.g., compaction, cementation, and dissolution), but also profoundly affected by high temperature and overpressure.
Effects of High Temperature on Deep Reservoir Physical Properties.
The most important impact of high temperature on reservoir physical properties lies in accelerating the decrease of primary pores.
Effects of Overpressure on Deep Reservoir Properties.
Online since: December 2013
Authors: Yong Jun Zhang, Jing Tao Han, Hui Zhang, Yuan Dong, Jie Ren Hu
The analysis of microstructure at the defect
Due to the difference in the mechanical responses of austenite and ferrite under hot working conditions can lead to the formation of edge cracks or a poor surface finish.
The analysis on the factors influencing the sticking Sticking is not only affected by the microstructure and high temperature mechanical properties of rollers and rolled piece, but associate with rolling parameters such as rolling temperature, rolling speed, reduction, technological lubrication as well as the number and distribution of high temperature oxide.
To improve the rolling temperature can favorably affect the sticking. it does not generate higher volume fraction of oxides, but can induce infiltration-type oxide transform into layer type oxide, which can more significantly improve the high temperature hardness than the former.
Furthermore, on the premise of guaranteeing mechanical properties of the product, the decrease of the reduction appropriately can also reduce the incidence of sticking. 4.
The analysis on the factors influencing the sticking Sticking is not only affected by the microstructure and high temperature mechanical properties of rollers and rolled piece, but associate with rolling parameters such as rolling temperature, rolling speed, reduction, technological lubrication as well as the number and distribution of high temperature oxide.
To improve the rolling temperature can favorably affect the sticking. it does not generate higher volume fraction of oxides, but can induce infiltration-type oxide transform into layer type oxide, which can more significantly improve the high temperature hardness than the former.
Furthermore, on the premise of guaranteeing mechanical properties of the product, the decrease of the reduction appropriately can also reduce the incidence of sticking. 4.
Online since: February 2007
Authors: Seiji Ban, Masahiro Nawa, Hideo Sato, Y. Suehiro, H. Nakanishi
Introduction
Previous reports demonstrated that yttria stabilized tetragonal zirconia polycrystals (Y-TZP) and the
zirconia/alumina nanocomposite stabilized with cerium oxide (Ce-TZP/Al2O3 nanocomposite) have
excellent mechanical properties and can be applied to dental restoratives [1].
Especially, the Ce-TZP/Al2O3 nanocomposite showed excellent mechanical durability for low temperature degradation in various water-based condition encountered in dentistry and high reliability for dental restoratives such as all-ceramic bridges [1,2].
It is known that the mechanical properties of zirconia frame were affected by these treatments [3,4].
Furthermore, these surface finish affects the low temperature degradation of zirconia [5].
The two-way analysis of variance (ANOVA) for each material was applied with the biaxial flexure strength in MPa as a dependent variable, and sandblasting pressure and heat treatment as factors.
Especially, the Ce-TZP/Al2O3 nanocomposite showed excellent mechanical durability for low temperature degradation in various water-based condition encountered in dentistry and high reliability for dental restoratives such as all-ceramic bridges [1,2].
It is known that the mechanical properties of zirconia frame were affected by these treatments [3,4].
Furthermore, these surface finish affects the low temperature degradation of zirconia [5].
The two-way analysis of variance (ANOVA) for each material was applied with the biaxial flexure strength in MPa as a dependent variable, and sandblasting pressure and heat treatment as factors.
Online since: March 2009
Authors: De Hai Ping, Li Ming Yu, Satoshi Iwasaki, Fu Xing Yin
Introduction
Internal friction is defined as the mechanical energy dissipation property of materials, measured by
the energy dissipation ∆W, divided by the maximum elastic energy W during one cycle loading, i.e.
temperature, and the dipole shape factor, which is the intrinsic parameter controlling the peak height.
Since high damping alloys are also expected to have adequate mechanical properties, as well as the superior workability for the applications as Fig. 4.
Snoek relaxation peak shift and broadening observed in Nb-1%M alloys a), and Nb-50%V alloys b) [13,14]. structural materials, Ti based alloys involving such metallic solutes, Nb, Cr, or V, become the smart choice in such alloys design since β-Ti alloys show the good mechanical properties for engineering applications [7].
It is made clear that Ti and Cr show a larger binding effect than Nb in affecting the V-O relaxation.
temperature, and the dipole shape factor, which is the intrinsic parameter controlling the peak height.
Since high damping alloys are also expected to have adequate mechanical properties, as well as the superior workability for the applications as Fig. 4.
Snoek relaxation peak shift and broadening observed in Nb-1%M alloys a), and Nb-50%V alloys b) [13,14]. structural materials, Ti based alloys involving such metallic solutes, Nb, Cr, or V, become the smart choice in such alloys design since β-Ti alloys show the good mechanical properties for engineering applications [7].
It is made clear that Ti and Cr show a larger binding effect than Nb in affecting the V-O relaxation.
Online since: January 2016
Authors: Han Huang, Cheng Wei Kang
As the thin film layers have very different mechanical and material properties, traditional machining processes, such as grinding, often lead to delamination at layer interfaces [6].
The successful understanding of the delamination mechanisms for multilayered structures relies on not only the mechanical properties of individual film material, but also the stress concentration induced by the mismatch of materials properties at the interfaces.
The mismatch of material properties between two layers, i.e.
Summary For a multilayered thin film structure, both tensile stress and shear stress at interface is crucial factors in delamination mechanism.
The stress at the interface is caused by the mismatch in the plastic properties of the two neighboring layers.
The successful understanding of the delamination mechanisms for multilayered structures relies on not only the mechanical properties of individual film material, but also the stress concentration induced by the mismatch of materials properties at the interfaces.
The mismatch of material properties between two layers, i.e.
Summary For a multilayered thin film structure, both tensile stress and shear stress at interface is crucial factors in delamination mechanism.
The stress at the interface is caused by the mismatch in the plastic properties of the two neighboring layers.
Online since: August 2020
Authors: Aysar Hassan Subair, Ala Nasir Aljorany
Tsis the dimensionless stress ratio tensor TstrTs and, fb , fe, fd represent the pycnotropy and baratropy scalar factors described by Kolymbas [3].
The other soil properties are displayed in Table 1, the Direct Shear test is used to find the soil shear strength parameters (φ, c) performed according to [6].
Table (1) Soil Properties.
It has been found that the amount of sand, roughness of the base plate and funnel lifting rate are the factors that affect the value of the angle of repose obtained by using the abovementioned method.
The soil properties in Table 4 are used.
The other soil properties are displayed in Table 1, the Direct Shear test is used to find the soil shear strength parameters (φ, c) performed according to [6].
Table (1) Soil Properties.
It has been found that the amount of sand, roughness of the base plate and funnel lifting rate are the factors that affect the value of the angle of repose obtained by using the abovementioned method.
The soil properties in Table 4 are used.
Online since: August 2013
Authors: Xue Wei Zhao, Pei Qi Zhang, Meng Meng Lei, Zhang Cun Wang
Small amplitude oscillation shear testing is widely used to follow the structure and properties of wheat flour dough [1].
Beside gluten, starch is also believed to influence the mechanical properties of dough.
Previous studies in linear viscoelastic region suggested that starch plays some roles in the rheological properties of dough [5, 6, 7].
In addition, the source of starch is also a determining factor, while the size of starch is not a vital factor.
It will be interesting to reveal microstructural basis and the essential factors that contribute to the different viscosity of the doughs made from different source of starch.
Beside gluten, starch is also believed to influence the mechanical properties of dough.
Previous studies in linear viscoelastic region suggested that starch plays some roles in the rheological properties of dough [5, 6, 7].
In addition, the source of starch is also a determining factor, while the size of starch is not a vital factor.
It will be interesting to reveal microstructural basis and the essential factors that contribute to the different viscosity of the doughs made from different source of starch.
Online since: August 2010
Authors: Hai Yan Tan, Yan Hua Zhang
Mechanical properties, including modulus of rupture (MOR),
modulus of elasticity (MOE), internal bond strength (IB), and water resistance are very important
specifications for particleboards.
Mechanical properties were determined by using a testing machine and follows an ASTM standard method (GB/T 9846.1~9846.8, 2004).
Results and discussion Physical properties of Modified UF resin.
A critical factor for strorage stablity of resin is pH.
The results of this study demonstrated that the water-resistance and mechanical properties particleboard improved with increasing of melamine intensity.
Mechanical properties were determined by using a testing machine and follows an ASTM standard method (GB/T 9846.1~9846.8, 2004).
Results and discussion Physical properties of Modified UF resin.
A critical factor for strorage stablity of resin is pH.
The results of this study demonstrated that the water-resistance and mechanical properties particleboard improved with increasing of melamine intensity.
Online since: October 2013
Authors: Hong Lu, Talal Elsir, Gang Wang
Modeling of test platform was built to study the mechanical structure in theory.
However, the gear system displays undesirable characteristics such as the backlash, which becomes a mechanical imperfection.
Design of key part The platform uses a flexible coupling which allows a certain deviation in the case which does not affect the vibration and the life of the entire connection.
Gear meshing Fig.8 Total deformation Compared with the property of the material, the custom-made couplings can meet requirements.
Analysis static structure The backlash caused by shape-changed of the gears is one of the main influence factors, so it is important to analysis the static structure to find out the maximum deformation, equivalent (von-Mises) stress and equivalent elastic strain.
However, the gear system displays undesirable characteristics such as the backlash, which becomes a mechanical imperfection.
Design of key part The platform uses a flexible coupling which allows a certain deviation in the case which does not affect the vibration and the life of the entire connection.
Gear meshing Fig.8 Total deformation Compared with the property of the material, the custom-made couplings can meet requirements.
Analysis static structure The backlash caused by shape-changed of the gears is one of the main influence factors, so it is important to analysis the static structure to find out the maximum deformation, equivalent (von-Mises) stress and equivalent elastic strain.