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Online since: November 2010
Authors: Jun Liu, Bao Shou Sun, Gang Ming Wang
The constitutive equation of the rheological process includes not only the definition of rheological properties, also rheological dynamic equations of specific fluid and its boundary conditions.
Injection mold sets the gate position directly related to the melt flow in the mold cavity, thus affecting the polymer molecular orientation and warpage after molding.
Table 2 The results of flow and warp Maximum pressure at injection location [MPa] Maximum part temperature [°С] Differential cooling [mm] Differential shrinkage [mm] Orientation effects [mm] 45.77 89.51 0.0033 1.252 0.4828 Warp through the integrated analysis of the overall deformation is basically known to meet the design requirements, shrinkage factors the greatest impact on the warpage, but the impact of cooling and molecular orientation was relatively low.
In ensuring good cooling conditions, the shrinkage factor is the maximum affected warpage of plastic parts.
Li: Mechanical & Electrical Engineering Magazine, Vol. 24 (2007), pp. 5-8
Online since: November 2011
Authors: Hong Liang, Xing Liu, Bin Liu, Yan Chen, Yu Ting Wu, Wei Wang, Hong Guang Zhang
Using this way, the thermodynamic parameters should be calculated and the thermodynamic properties of this system with different working fluids should be analyzed.
However, the working fluid of the system will also affect the efficiency of the ORC system, so this paper mainly research which is the fittest working fluid of this ORC system by analyzing the thermodynamic properties with different working fluids.
This soft is the most popular spread and application in the refrigerant properties library.
The factors affecting the saturated temperature in the condenser are listed as follows. (1) The inlet temperature of water is related to the local ambience temperature.
Finally, the saturated temperature of fluid in the condenser is the sum of the mentioned factors, which is 318K.
Online since: October 2014
Authors: Waldo Stumpf, Charles Witness Siyasiya, Rorisang Maubane, Kevin Mark Banks, Alison Tuling
Introduction Microalloyed steels are widely used due to their good mechanical and microstructural properties [1-3].
The austenite grain size, d, affects both the recrystallisation and the phase transformation characteristics during processing and thus the final ferrite/pearlite microstructure and mechanical properties, particularly in air-cooled plates [4-7].
Grain refinement and strain accumulation - factors influenced by dislocation recovery (DRV), static and dynamic recrystallisation (SRX and DRX) and precipitation behaviour - are important for good properties [9].
During conventional rolling of peritectic microalloyed plates the final microstructure is mostly non-uniform and coarse due to small applied pass strains which negatively affect the recrystallisation behaviour and limits the potential strength and toughness properties in these steels.
For C-Mn and C-Mn-V steels final pass strains greater than 0.2 were sufficient to initiate DRX and refine the austenite grain size to less than 40µm. 3) Adequate mechanical properties of peritectic, microalloyed plates can be achieved without the need for additional heat treatment, by manipulating roughing schedules which optimizes the austenite microstructure prior to finishing.
Online since: October 2018
Authors: Hong Jie Luo, Xiao Tong Lu, Wei Yin, Qi Le He, Lin Li Wu
If the mechanical properties of porous Ti can be improved, it will be used for not only biomaterials, but also structural/functional applications.
The influence factors of preform formability were investigated.
Figure 5 shows the porosity and mechanical properties of porous titanium in different temperatures.
However, with the growth of the sintered neck, the bonding strength between the particles increases, resulting in an increase in compressive strength and elastic modulus. 3.4 Effect of Sintering time on Structure and Mechanical Properties of Porous Titanium The effect of sintering time on the structure and mechanical properties of porous titanium was studied in this section.
Figure 7 shows the porosity and mechanical properties of porous titanium at different sintering time.
Online since: September 2014
Authors: Yin Long Zhu, Hong Pin Zhou, Hua Ming Wang
The following factors maybe contribute to this deviation.
b) The experiment environment such as temperature and electrode material affects the experimental results.
Several factors that affect the DEA’s actuation characteristic including stiffness and original length of compressive spring, actuation voltages are all analyzed.
[14] Yeoh O.H., Characterization of elastic properties of carbon-black filled rubber vulcanizates, Rubber Chem.
Mechanical properties of living tissues, 2nd edn.
Online since: March 2023
Authors: Sanjib Kr Rajbongshi
Surface finish has much significance in machining properties like friction, corrosion resistance, wear resistance, fatigue strength etc.
The tool rake angle, clearance angle and nose radius has affected machining properties like surface roughness, tool wear, cutting forces etc.
From ANOVA, feed rate followed by the cutting speed was the most dominant controlling parameters affecting surface roughness.
Dirviyam and Palanisamy [11] conducted an experimental plan with Taguchi’s OA, ANOVA and S/N ratio for finding the influential factors and their optimum combinations affecting surface roughness during dry machining operation of AISI 304 austenitic stainless steel bars using TiC and TiCN coating tungsten carbide.
In Table 2, 1 and 2 represents low and high values of cutting factors respectively.
Online since: January 2012
Authors: Tomotsugu Shimokawa, Kazuyuki Shizawa, Yoshiteru Aoyagi, Yoshiyuki Kaji
We investigate comprehensively the effect of dislocation behavior on the material property of nanostructured metal.
The UFGM, whose grain size is less than 1mm, expresses remarkably peculiar behavior in material and mechanical aspects [1, 3] and a computational model predicting these properties is expected in the field of materials science and engineering.
It is considered that such unusual mechanical properties are originating in enormous volume fraction of grain boundary.
We investigate comprehensively the effect of dislocation behavior on the material property of nanostructured metal.
It is predicted that such differences of dislocation behavior affect on softening of nanostructured metal.
Online since: August 2006
Authors: Ji Heang Yu, Tae Ho Shin, Sang Hoon Hyun, In Sub Han, Sang Kuk Woo, Byung Koog Jang, Shi Woo Lee
Introduction In recent years, the nano-structure ceramic materials have received much attention due to their outstanding properties which is not observed by normal sintering process.
The microstructure of coating layer is a very important factor determining the corrosion and thermal resistance of the base material.
Stabilized zirconia has wide application fields of structural and electrochemical devices due to the excellent mechanical properties, chemical stability in reducing atmosphere, and high ionic conductivity.
However, it is inferred that oxygen flow rate is not the essential factor to determine grain size because the deposited YSZ films have a similar SEM micrograph each other as shown in Fig. 3.
Oxidizing atmosphere may affect on the microstructure more strongly at lower substrate temperature.
Online since: August 2013
Authors: Jittiporn Kruenate, Kowit Suwannahong, Torpong Kreetachat
Generally, various types of polymer are chosen to be used as a substrate for TiO2 with different types of petroleum based polymer such as polyethylene, polypropylene, polyvinyl chloride due to its low cost materials, good mechanical properties and light weight.
Biodegradable polylactic acid (PLA), polybutylene adipate-co-terephthalate (PBAT) and polybutylene succinate (PBS), which are biodegradable aliphatic polyesters, biopolymer polymer were interesting to replace other petroleum base polymer with many advantage e.g. biodegradable, easy to process and good mechanical properties.
The preparation of reaction temperatures were adjusted to optimum conditions, then the physical properties of the TiO2-biocomposite film were studied by x-ray diffraction, SEM, UV- near-IR spectrophotometer.
Surface morphology of TiO2 was one of the most important factors which affected to the efficiency of a photocatalytic films[10].
Accordingly, this TiO2 coating on the Bio-composite film could be excited by lower energy than the Bio-composite film without TiO2.Moreover,TiO2 coated biopolymer was suitable for photocatalyst because it was properties of semiconductor [6].
Online since: January 2016
Authors: Ivan Křupka, Petr Svoboda, David Kostal, Martin Hartl
Recently Cann et al. further experimented with the relationship between the film thicknesses [6], the properties of the lubricant and variable parameters: oil volume, speed, load and viscosity.
The thickness of the lubricant film in contact with non-conformal friction surfaces can be affected by a number of operational factors.
Mechanical Engineering, vol. 93, no. 1, pp. 44-50, 1971
Bearing performance limits with grease lubrication: the interaction of bearing design, operating conditions and grease properties
Correlation between Model Test Devices and Full Bearing Tests under Grease Lubricated Conditions: the interaction of bearing design, operating conditions and grease properties
Showing 13951 to 13960 of 25943 items