Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: September 2022
Authors: Jian Yu Chen, Xiao Zhang, Jin Yang Zhang, Xian Shuai Chen
The FE analysis was used to investigate its static mechanical property.
The osseointegration ability of dental implants is one of the key factors to ensure the success of implant surgery [2].
However, these methods cannot accurately control the pore properties of the scaffold [11].
Fig. 2 a) Machined components of SPDI (including UCP, PTP, LRP and locking screw). b) Assembled SPDI Finite Element Analysis To determine the mechanical properties of SPDI, the FE model was created as shown in Figure 3.
Factors Affecting Crestal Bone Loss With Dental Implants Partially Covered With a Porous Coating: A Finite Element Analysis.
The osseointegration ability of dental implants is one of the key factors to ensure the success of implant surgery [2].
However, these methods cannot accurately control the pore properties of the scaffold [11].
Fig. 2 a) Machined components of SPDI (including UCP, PTP, LRP and locking screw). b) Assembled SPDI Finite Element Analysis To determine the mechanical properties of SPDI, the FE model was created as shown in Figure 3.
Factors Affecting Crestal Bone Loss With Dental Implants Partially Covered With a Porous Coating: A Finite Element Analysis.
Online since: November 2016
Authors: Giuseppe Barbieri, Francesco Cognini, Massimo Moncada, Antonio Rinaldi, Gabriele Lapi
The chemical compositions and the mechanical properties of all these alloys are summarized respectively in Table 1 and Table 2.
Alloy Designation Cr Cu Fe Mg Mn Si Ti Zn Others Each Total AA-6082 0.25 0.10 0.50 0.60-1.2 0.40-1.0 0.70-1.3 0.10 0.20 0.05 0.15 AA-5754 0.30 0.10 0.40 2.6-3.6 0.50 0.40 0.15 0.20 0.05 0.15 AA 5556 0.10 0.10 0.40 4.7-5.5 0.5-1.0 0.25 0.10 0.25 0.05 0.15 Table 2: Measured mechanical properties of aluminum alloys (UNI EN 755-2).
Using MINITAB16© a 23 factorial design with 3 factors and 2 levels was implemented.
The investigated parameter (factors) were the influence of the welding speed (V), the laser output power (P), and the wobble amplitude (K).
The results show that, in the butt joints, the factors that influenced the porosity are the laser source power and the filler wire amount.
Alloy Designation Cr Cu Fe Mg Mn Si Ti Zn Others Each Total AA-6082 0.25 0.10 0.50 0.60-1.2 0.40-1.0 0.70-1.3 0.10 0.20 0.05 0.15 AA-5754 0.30 0.10 0.40 2.6-3.6 0.50 0.40 0.15 0.20 0.05 0.15 AA 5556 0.10 0.10 0.40 4.7-5.5 0.5-1.0 0.25 0.10 0.25 0.05 0.15 Table 2: Measured mechanical properties of aluminum alloys (UNI EN 755-2).
Using MINITAB16© a 23 factorial design with 3 factors and 2 levels was implemented.
The investigated parameter (factors) were the influence of the welding speed (V), the laser output power (P), and the wobble amplitude (K).
The results show that, in the butt joints, the factors that influenced the porosity are the laser source power and the filler wire amount.
Online since: September 2013
Authors: Ming Hua Huang, Qing Hua Chen, Hui Dong, Di Ru Xu, Duan Cheng Wang, Yong Shun Cui
But as cartilage scaffolds, its degradation rate is rapid; the mechanical properties are poor; water-holding capacity is insufficient and the porosity is not high.
Its degradation and mechanical properties can be regulated by changing the crosslinking degree.
For the purpose of gaining the optimal experimental program of the cartilage scaffolds, in this study, carried out the four-factor three-level orthogonal design L9 (34) experiment in which the four factors were the KGM content, the COL II content, the ammonia content and the freeze temperature since they played a vital role in the structures and the comprehensive properties of the cartilage scaffolds.
The influence of each factor and level on the comprehensive properties is shown in Fig. 1.
Table2 Water absorption of KGM content (g) initial mass (g) water absorption (%) 1.0 0.168 829 1.5 0.275 846 2.0 0.298 892 different KGM content Fig.1 The curves of each factor and lever affecting comprehensive properties The Water Absorption Analysis.
Its degradation and mechanical properties can be regulated by changing the crosslinking degree.
For the purpose of gaining the optimal experimental program of the cartilage scaffolds, in this study, carried out the four-factor three-level orthogonal design L9 (34) experiment in which the four factors were the KGM content, the COL II content, the ammonia content and the freeze temperature since they played a vital role in the structures and the comprehensive properties of the cartilage scaffolds.
The influence of each factor and level on the comprehensive properties is shown in Fig. 1.
Table2 Water absorption of KGM content (g) initial mass (g) water absorption (%) 1.0 0.168 829 1.5 0.275 846 2.0 0.298 892 different KGM content Fig.1 The curves of each factor and lever affecting comprehensive properties The Water Absorption Analysis.
Online since: July 2012
Authors: Leonid Afremov, Yury Kirienko
Introduction
An important factor affecting the process of magnetization of an ensemble of small (single-domain)
particles is their magnetostatic interaction.
Both external magnetic field H and uniaxial mechanical stresses σ are applied along the Ozaxis. 5.
The saturation remanence of interacting nanoparticles changes in a similar way, due to the mechanical stresses.
This behavior of Hc and Irs is connected to the fact that the magnetostatic interaction stronger shuffles the magnetic moments of low-coercive nanoparticles, and has a smaller influence on the particles in the high-coercive states (see Fig.4с). 2 Here and below, a record «c = 0» means that the concentration is small, but nonzero (otherwise the magnetization of the sample would also turn to zero).Figure 4: (a) the dependence of the coercive force Hc and (b) saturation remanence Irs of an ensemble of non-interacting (solid curves) and interacting (dashed curves) spherical nanoparticles on the relative stress kσ; (c) the dependence of the relative coercive force Hc(c = 0.24)/Hc(c = 0) and the relative saturation remanence Irs(c = 0.24)/Irs(c = 0) on the mechanical stresses; q1 = 1, Ain = 0 Acknowledgments The work was partly supported by grants of Ministry of Education and Science: Federal Contract № 02.740.11.0549, «Magnetic properties and spin-transport phenomena in nanoscale
Kirienko, ``Effect of mechanical stresses on the coercive force of the heterophase non-interacting nanoparticles,'' Advanced Materials Research, vol. 472, p. 2199-2202, 2012
Both external magnetic field H and uniaxial mechanical stresses σ are applied along the Ozaxis. 5.
The saturation remanence of interacting nanoparticles changes in a similar way, due to the mechanical stresses.
This behavior of Hc and Irs is connected to the fact that the magnetostatic interaction stronger shuffles the magnetic moments of low-coercive nanoparticles, and has a smaller influence on the particles in the high-coercive states (see Fig.4с). 2 Here and below, a record «c = 0» means that the concentration is small, but nonzero (otherwise the magnetization of the sample would also turn to zero).Figure 4: (a) the dependence of the coercive force Hc and (b) saturation remanence Irs of an ensemble of non-interacting (solid curves) and interacting (dashed curves) spherical nanoparticles on the relative stress kσ; (c) the dependence of the relative coercive force Hc(c = 0.24)/Hc(c = 0) and the relative saturation remanence Irs(c = 0.24)/Irs(c = 0) on the mechanical stresses; q1 = 1, Ain = 0 Acknowledgments The work was partly supported by grants of Ministry of Education and Science: Federal Contract № 02.740.11.0549, «Magnetic properties and spin-transport phenomena in nanoscale
Kirienko, ``Effect of mechanical stresses on the coercive force of the heterophase non-interacting nanoparticles,'' Advanced Materials Research, vol. 472, p. 2199-2202, 2012
Online since: October 2012
Authors: Chun Yan Wei, Li Hua Lv, Yong Zhu Cui, Zheng Wu, Wang Xiao
According to the factors which affected the properties of the composites, the orthogonal table of L16 (45) was adopted.
Levels of the factors were shown in Table 1.
It thereby affected the other properties of the composites.
Integrating the results of the testing of mechanical properties, the conclusion was obtained that the composites could get better heat-resistance when length of fibers was 10mm.
If the addition of TAIC was too much, it would not only fail to increase HDT but also affect the other properties of the composites.
Levels of the factors were shown in Table 1.
It thereby affected the other properties of the composites.
Integrating the results of the testing of mechanical properties, the conclusion was obtained that the composites could get better heat-resistance when length of fibers was 10mm.
If the addition of TAIC was too much, it would not only fail to increase HDT but also affect the other properties of the composites.
Online since: April 2014
Authors: Petra Lacková, Ondrej Milkovič, Daniela Žabecká, Milan Škrobian, Matúš Bajcura
Mechanical properties, structure as well as symmetrically torsional fatigue of these alloys were evaluated.
Due to the alloying the selected aluminum alloys have a good formability, mechanical properties, weldability and corrosion resistance but on the other side they have a low fatigue resistance [2, 3].
The factors which influence fatigue resistance of the material are type and frequency of load, treatment, shape, and surface quality or other stress concentrators of material and influence of the environment where the material is located [5].
Results of mechanical properties evaluated as average value from six measurements are summarized in Table 2.
Table 2 Mechanical properties of aluminium alloys Material YS [MPa] UTS [MPa] A5 [%] Z [%] E [GPa] HV 10 [N.mm-2] HV 30 [N.mm-2] YS/UTS EN AW 6061 205 274 9 9 110 88 80 0.74 EN AW 6082 185 297 20 57 70 83 80 0.62 EN AW 7075 581 636 7 8 74 165 139 0.91 It is possible to estimate that the mechanical properties are the most dependent to type of treatment of materials (T3 and T4).
Due to the alloying the selected aluminum alloys have a good formability, mechanical properties, weldability and corrosion resistance but on the other side they have a low fatigue resistance [2, 3].
The factors which influence fatigue resistance of the material are type and frequency of load, treatment, shape, and surface quality or other stress concentrators of material and influence of the environment where the material is located [5].
Results of mechanical properties evaluated as average value from six measurements are summarized in Table 2.
Table 2 Mechanical properties of aluminium alloys Material YS [MPa] UTS [MPa] A5 [%] Z [%] E [GPa] HV 10 [N.mm-2] HV 30 [N.mm-2] YS/UTS EN AW 6061 205 274 9 9 110 88 80 0.74 EN AW 6082 185 297 20 57 70 83 80 0.62 EN AW 7075 581 636 7 8 74 165 139 0.91 It is possible to estimate that the mechanical properties are the most dependent to type of treatment of materials (T3 and T4).
Online since: February 2016
Authors: Chi Fai Cheung, Zhong Chen Cao
An Experimental Investigation of Effect of Process Parameters on Materials Removal Characteristics in Fluid Jet Polishing
Zhong-Chen Cao1, a and Chi Fai Cheung1,b
1 Partner State Key Laboratory of Ultra-precision Machining Technology, Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
a charles.cao@connect.polyu.hk, b Benny.Cheung@polyu.edu.hk
Keywords: Fluid jet polishing, material removal rate, ultra-precision machining, process factors, tool influence function.
They are mixed to become a slurry by mechanical stirring in a tank.
To study the effect of slurry pressure, standoff distance, and impingement angle on the polishing tool influence function, all these experiments were conducted by changing one process factor and keeping the other process factors constant as shown in Table 1.
The material property of the polished surface is also a factor that should be considered when understanding the effect of the standoff distance on the influence function.
Lee: Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Vol. 224 (2010) p.59
They are mixed to become a slurry by mechanical stirring in a tank.
To study the effect of slurry pressure, standoff distance, and impingement angle on the polishing tool influence function, all these experiments were conducted by changing one process factor and keeping the other process factors constant as shown in Table 1.
The material property of the polished surface is also a factor that should be considered when understanding the effect of the standoff distance on the influence function.
Lee: Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Vol. 224 (2010) p.59
Online since: February 2012
Authors: Raoul Plettke, Thomas Schneider, Michael Lechner, Marion Merklein
With THTP the mechanical properties of the material are locally modified by a short-term heat treatment.
The changes of the mechanical properties caused by the heat treatment were analyzed by tensile tests.
Heat treatment layouts and forming results Based on the knowledge of the mechanical properties and the heat-affected zone, appropriate heat treatment layouts have to be found in order to enhance the forming limit.
The key idea of THTP is to locally modify the mechanical properties of the profile.
Key idea is to modify partial the mechanical properties by a local laser heat treatment.
The changes of the mechanical properties caused by the heat treatment were analyzed by tensile tests.
Heat treatment layouts and forming results Based on the knowledge of the mechanical properties and the heat-affected zone, appropriate heat treatment layouts have to be found in order to enhance the forming limit.
The key idea of THTP is to locally modify the mechanical properties of the profile.
Key idea is to modify partial the mechanical properties by a local laser heat treatment.
Online since: November 2010
Authors: Gang Yi Zhou, Jun Liu, Xin Long Dong
There are many affecting factors in the precision of powder products, such as the design of mold shelf, manufacturing precision, sintering conditions and subsequent processing.
(4) Because the major parts of frame are welded or mechanical fastening.
Mechanical properties of Q235 are shown in Table 1.
Table 1 Mechanical property of Q235 Elastic odulus [GPa] Poisson's ratio Yield stress [MPa] Tensile strength [MPa] 206 0.3 235 375 ANSYS software based on finite element analyzed the frame of powder molding press.
This unit can analyze the stress of the structure, deformation, etc., conforming to material properties of realistic steel and the results of data analysis [10-11].
(4) Because the major parts of frame are welded or mechanical fastening.
Mechanical properties of Q235 are shown in Table 1.
Table 1 Mechanical property of Q235 Elastic odulus [GPa] Poisson's ratio Yield stress [MPa] Tensile strength [MPa] 206 0.3 235 375 ANSYS software based on finite element analyzed the frame of powder molding press.
This unit can analyze the stress of the structure, deformation, etc., conforming to material properties of realistic steel and the results of data analysis [10-11].
Online since: July 2020
Authors: Azwar Manaf, Novrita Idayanti, Dedi Dedi
Sangkuriang, Bandung 40135, Indonesia
anovrita13@gmail.com, bdediamada1@gmail.com, c*azwar@ui.ac.id
Keywords: Cobalt ferrite, crystallite structures, magnetic properties, mechanical alloying, sintering temperatures.
Among of spinel ferrites, CoFe2O4 is the most interesting to be explored because it has wide potential applications and good magnetic properties like high saturation magnetization value, high coercivity, strong anisotropy, chemically stable, and good mechanical properties [3].
The paper will provide information on the effect of sintering temperature on structural changes and magnetic properties of CoFe2O4 during the mechanical alloying process.
The magnetic properties were evaluated by a Permagraph (MAGNET-PHYSIK Dr.
The comparative of magnetic properties of CoFe2O4 under different conditions [19] Synthesis method and sintering condition Mean diameter D (nm) Remanence 𝑀r (emu/g) Magnetization at Maximum Field 𝑀s (emu/g) Remanence ratio R = 𝑀r/𝑀s Coercivity Hc (kOe) - Solid state (1200 °C, 8h) 380 13 78 0.16 0.32 - Citrate gel (300 °C, 2h) 24 26 66 0.39 1.38 - Polymer complex 32 30 67 0.45 1.63 - Mechanical alloying (1000 °C, 2h), This work 58 36 74 0.49 1.65 Conclusions The sintering temperature affects the microstructures and magnetic properties of CoFe2O4 during the preparation through the mechanical alloying process.
Among of spinel ferrites, CoFe2O4 is the most interesting to be explored because it has wide potential applications and good magnetic properties like high saturation magnetization value, high coercivity, strong anisotropy, chemically stable, and good mechanical properties [3].
The paper will provide information on the effect of sintering temperature on structural changes and magnetic properties of CoFe2O4 during the mechanical alloying process.
The magnetic properties were evaluated by a Permagraph (MAGNET-PHYSIK Dr.
The comparative of magnetic properties of CoFe2O4 under different conditions [19] Synthesis method and sintering condition Mean diameter D (nm) Remanence 𝑀r (emu/g) Magnetization at Maximum Field 𝑀s (emu/g) Remanence ratio R = 𝑀r/𝑀s Coercivity Hc (kOe) - Solid state (1200 °C, 8h) 380 13 78 0.16 0.32 - Citrate gel (300 °C, 2h) 24 26 66 0.39 1.38 - Polymer complex 32 30 67 0.45 1.63 - Mechanical alloying (1000 °C, 2h), This work 58 36 74 0.49 1.65 Conclusions The sintering temperature affects the microstructures and magnetic properties of CoFe2O4 during the preparation through the mechanical alloying process.