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Online since: June 2014
Authors: Jozef Majerik, Rozmarína Dubovská
According to the authors [15, 16, 17, 18], the causes of that trend are especially in improving the strength properties of sheets and development of technologies for hard milling and forming.
Material properties are assigned to the following parts of the 3D model.
Critical areas could be optimized by the change of radius area, as well as changing friction between the forming tool and blanks, alternatively by exchanging material with improved properties.
Gonzáles: Analysis of factors affecting the high-speed side milling of hardened die steels, Journal of Materials Processing Technology Vol. 162-163 (2005), p. 696-701 [23] F.
Balič: Influence of the Milling Strategy on the Durability of Forging Tools, Strojniški vestnik - Journal of Mechanical Engineering Vol. 57 (2011), p. 898-903 [29] C.
Material properties are assigned to the following parts of the 3D model.
Critical areas could be optimized by the change of radius area, as well as changing friction between the forming tool and blanks, alternatively by exchanging material with improved properties.
Gonzáles: Analysis of factors affecting the high-speed side milling of hardened die steels, Journal of Materials Processing Technology Vol. 162-163 (2005), p. 696-701 [23] F.
Balič: Influence of the Milling Strategy on the Durability of Forging Tools, Strojniški vestnik - Journal of Mechanical Engineering Vol. 57 (2011), p. 898-903 [29] C.
Online since: June 2020
Authors: Sayed Mahmoud, Abdelrahman A.M. Ismail, Ahmed Ali Showahy, Essam Ramadan Shaaban, Yasser A.M. Ismail
The J/V characteristics were performed soon after preparation of the complete devices to avoid any change in the photoelectric properties caused by age.
It is well known that, the increase in spin coating speed of the sol-gel solution for preparation of ZnO films tends to decrease film thickness and, therefore, tends to change optical, structural and other properties of ZnO film as stated in many literatures [22-24].
Therefore, the observed variation in device performance parameters, as shown in Fig. 7, may be attributed to a variation occurred in film thickness and other its properties with increasing spin coating speed of the ZnO layer.
Mehra, Effect of thickness on structural, electrical, optical and magnetic properties of Co and Al doped ZnO films deposited by sol-gel route, Appl.
Sahdan, Influence of Spinning Speed on the Properties of Sol-Gel Spin Coated ZnO Films, Advanced Materials Research 970 (2014) 115-119
It is well known that, the increase in spin coating speed of the sol-gel solution for preparation of ZnO films tends to decrease film thickness and, therefore, tends to change optical, structural and other properties of ZnO film as stated in many literatures [22-24].
Therefore, the observed variation in device performance parameters, as shown in Fig. 7, may be attributed to a variation occurred in film thickness and other its properties with increasing spin coating speed of the ZnO layer.
Mehra, Effect of thickness on structural, electrical, optical and magnetic properties of Co and Al doped ZnO films deposited by sol-gel route, Appl.
Sahdan, Influence of Spinning Speed on the Properties of Sol-Gel Spin Coated ZnO Films, Advanced Materials Research 970 (2014) 115-119
Online since: June 2013
Authors: Xiao Xing Liu, Qi Ying Pan, Hao Su
Tianjin University has done a lot of experimental study on flow law of fluid in the filter chamber of rotating disk dynamic filter[15]; in 1996, by theoretical analysis of flow mechanism of fluid in the filter chamber, mathematical model of fluid flow was established and tested via experiments; the theoretical calculation method was obtained, and factors influencing filtration rate of dynamic filter was studied via dynamic test.
Factors influencing filter efficiency are numerous, but under the condition of fixed filter medium, what influences filter efficiency most are rotational speed of rotating disk, distance between blade and filtering surface and radius size of disk, which directly affect forming condition of filter cake.
Main factors influencing filtration rate is roughly analyzed via orthogonal test, dynamic pressure influence coefficient is determined via comparative test between dynamic pressure cross-flow filtration and normal cross-flow filtration, and the curve is made; 6) Make a research on several factors influencing dynamic pressure cross-flow filtration rate, including rotational speed of inner rotating cylinder, width of annular space, material concentration, filter medium and so on, find influence law of these factors on dynamic pressure cross-flow filtration rate, make objective analysis of influence degree of all influencing factors on filtration rate, and it will test and be tested by theoretical analysis.
Discussion about Material Property, Separation Method and Operation Condition.
Influencing Factors and Amplification Law of Filtration Velocity of Dynamic Rotating Filter Press (2).
Factors influencing filter efficiency are numerous, but under the condition of fixed filter medium, what influences filter efficiency most are rotational speed of rotating disk, distance between blade and filtering surface and radius size of disk, which directly affect forming condition of filter cake.
Main factors influencing filtration rate is roughly analyzed via orthogonal test, dynamic pressure influence coefficient is determined via comparative test between dynamic pressure cross-flow filtration and normal cross-flow filtration, and the curve is made; 6) Make a research on several factors influencing dynamic pressure cross-flow filtration rate, including rotational speed of inner rotating cylinder, width of annular space, material concentration, filter medium and so on, find influence law of these factors on dynamic pressure cross-flow filtration rate, make objective analysis of influence degree of all influencing factors on filtration rate, and it will test and be tested by theoretical analysis.
Discussion about Material Property, Separation Method and Operation Condition.
Influencing Factors and Amplification Law of Filtration Velocity of Dynamic Rotating Filter Press (2).
Online since: December 2024
Authors: Darmadi Darmadi, Adisalamun Adisalamun, Muhammad Zaki, Aula Chairunnisak
Heat treatment can modify its properties, reducing water-induced expansion and enhancing stability for dynamic system applications.
Honeycomb monoliths offer advantages, including reduced pressure drops, improved mass efficacy, and compelling physical and thermodynamic properties [21].
The study primarily focused on characterizing the adsorbent's mechanical properties, particularly compressive strength and pressure drop.
The analyses were essential for understanding how changes in pressure affect the adsorbent structure.
Notably, in terms of mechanical properties, bentonite exhibited higher compressive strength, reaching a maximum of 16.3 MPa, in comparison to zeolite.
Honeycomb monoliths offer advantages, including reduced pressure drops, improved mass efficacy, and compelling physical and thermodynamic properties [21].
The study primarily focused on characterizing the adsorbent's mechanical properties, particularly compressive strength and pressure drop.
The analyses were essential for understanding how changes in pressure affect the adsorbent structure.
Notably, in terms of mechanical properties, bentonite exhibited higher compressive strength, reaching a maximum of 16.3 MPa, in comparison to zeolite.
Online since: May 2015
Authors: Sheng Min Tsai, Cherng Shing Lin, Min Gen Wu
A Case Study on a Fire Disaster in a Textile Factory
Cherngshing Lina, Mingen Wub, Shengmin Tsaic
Department of Mechanical Engineering Yuan Ze University, Taoyuan 32003 Taiwan, R.O.C.
Factory fires typically cause substantial casualties and property losses, and have therefore become a focal point for research.
Findings have shown that escapee response time, walking time, and waiting time are the three fundamental factors influencing overall evacuation time.
Therefore, the materials stacked at the bottom were unaffected or partially affected by the fire.
Factory fires typically cause substantial casualties and property losses, and have therefore become a focal point for research.
Findings have shown that escapee response time, walking time, and waiting time are the three fundamental factors influencing overall evacuation time.
Therefore, the materials stacked at the bottom were unaffected or partially affected by the fire.
Online since: June 2017
Authors: Bo Yang Liu, Bin Bin Liu, Feng Ye
With the structural relaxation, both the mechanical and physical properties vary in dependence of the annealing time.
Previous studies revealed that the electrical resistance changes due to structure relaxation (R-relaxation = ρrelaxed - ρunrelaxed) could be affected by the composition of amorphous alloys[12].
The basic features of such complicated behaviors have been attributed to different origins, such as free volume relaxation [13,16], compositional/topological short-range ordering [17]; some peculiarities of the activationenergy spectra [18] and change of the structural factors implied by the Ziman theory for the resistivity of liquid metals [13,19,20].
This suggests that the heat treatment at 445 K affects the electrical resistance in glass transition region.
Previous studies revealed that the electrical resistance changes due to structure relaxation (R-relaxation = ρrelaxed - ρunrelaxed) could be affected by the composition of amorphous alloys[12].
The basic features of such complicated behaviors have been attributed to different origins, such as free volume relaxation [13,16], compositional/topological short-range ordering [17]; some peculiarities of the activationenergy spectra [18] and change of the structural factors implied by the Ziman theory for the resistivity of liquid metals [13,19,20].
This suggests that the heat treatment at 445 K affects the electrical resistance in glass transition region.
Online since: February 2011
Authors: Chao Hui Zhang, Si Si Liu, Han Bing Zhang
Meniscus and Viscous Forces during the Nanoscale Separation of Sphere-on-sphere Contact Surfaces
Sisi Liu1, a, Chaohui Zhang1, b and Hanbing Zhang1, c
1School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, China100044
a09116326@bjtu.edu.cn, bzhhzhang@bjtu.edu.cn, c09121851@bjtu.edu.cn
Keywords: Meniscus Force, Viscous Force, Dynamic Contact Model, Contact Angle, Wettability
Abstract.
Cai [7] had focused on the effect on adhesive forces of factors such as the size of the surface, liquid properties and operating conditions.
The volume is unchanged in the separation, so it is one of the most important parameters affect the fracture height.
Analytical models have been presented in the past to determine how separation time affects adhesion force in ambient air.
Cai [7] had focused on the effect on adhesive forces of factors such as the size of the surface, liquid properties and operating conditions.
The volume is unchanged in the separation, so it is one of the most important parameters affect the fracture height.
Analytical models have been presented in the past to determine how separation time affects adhesion force in ambient air.
Online since: December 2007
Authors: Carlos H. Cáceres, A.H. Blake
There are two additional factors to consider: twinning, and the development of
short range order (SRO) in the concentrated alloys.
Twinning only effect if to slightly shift the K-M curves to the right in pure Mg and the lower alloys in Figs. 8 through 9, but it does not affect their maximum slope, suggesting than the rate of athermal hardening is not changed by twinning [1].
Zn in solution does not affect the rate of athermal strain hardening.
Seeger, in: Dislocations and mechanical properties of crystals, edited by J.C.
Twinning only effect if to slightly shift the K-M curves to the right in pure Mg and the lower alloys in Figs. 8 through 9, but it does not affect their maximum slope, suggesting than the rate of athermal hardening is not changed by twinning [1].
Zn in solution does not affect the rate of athermal strain hardening.
Seeger, in: Dislocations and mechanical properties of crystals, edited by J.C.
Online since: May 2016
Authors: Wantanee Buggakupta, Sirithan Jiemsirilers, Chanyanud Tianthong
Glass ceramic bodies with superior physical, chemical and mechanical properties came from a vitrified mixture of which the dust to ash ratio was 1:9 undergoing heat treatment at 900 oC for 5 hours.
Fractions of ZnO and Fe2O3 were varied from 0-3 wt% and 0-25 wt%, respectively to determine how they affected oil spot formation.
Compositions of the glaze directly affected the mechanism of spot evolution.
Thickness is one of the important factors for oil spot formation [8-9].
Fractions of ZnO and Fe2O3 were varied from 0-3 wt% and 0-25 wt%, respectively to determine how they affected oil spot formation.
Compositions of the glaze directly affected the mechanism of spot evolution.
Thickness is one of the important factors for oil spot formation [8-9].
Online since: July 2007
Authors: Ze Kun Yao, Hong Zhen Guo, J. Zhao, S.C. Yuan, Z.L. Zhao
In this paper, superplastic properties of 1933 aluminium alloy were evaluated and
the effect of hot ECAP on grain refinement and superplasticity was investigated.
Compared with original samples annealed at 400°C, the superplastic elongation of samples processed by ECAP for 4 passes increases by a factor of 130% about, and the range of superplastic temperature varies from 140°C to 210°C.
Moreover, the alloy with fine-grained microstructure usually exhibits excellent physical and mechanical properties.
It is also seen that the microstructure of clamping head (no deformation, only affected by heat) of sample is coarsened than the microstructure (Fig.1 (b)) of original forged block of 1933 alloy remarkably and grains are distinctly more homogeneous (Fig.4 (b)).
Concerned about actual productivity and microstructure, properties of pressed samples, ECAP processing for 4 passes at 300°C is recommended in this paper
Compared with original samples annealed at 400°C, the superplastic elongation of samples processed by ECAP for 4 passes increases by a factor of 130% about, and the range of superplastic temperature varies from 140°C to 210°C.
Moreover, the alloy with fine-grained microstructure usually exhibits excellent physical and mechanical properties.
It is also seen that the microstructure of clamping head (no deformation, only affected by heat) of sample is coarsened than the microstructure (Fig.1 (b)) of original forged block of 1933 alloy remarkably and grains are distinctly more homogeneous (Fig.4 (b)).
Concerned about actual productivity and microstructure, properties of pressed samples, ECAP processing for 4 passes at 300°C is recommended in this paper