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Online since: October 2013
Authors: Xiao Cong He
The metallurgical and mechanical properties of laser welded joints have been the subject of a considerable amount of experimental and numerical studies.
Due to the complex welded joint geometry and its three dimensional nature, it is very difficult to obtain governing equations for predicting the metallurgical and mechanical properties of laser welded joints.
The modelled volumetric heat source took into account a scale factor, and the shape factors given by the attenuation of the beam within the workpiece and the beam intensity distribution.
Process simulation An accurate knowledge of the laser welding process is important for predicting the metallurgical and mechanical properties of the laser welded structures.
The obtained results allow for determination both the material properties, and stress and strain state in the joint.
Online since: August 2009
Authors: Jin Xin He, Xia Dong, Zhao He Zheng
Introduction Disperse dye dispersion properties are very important for consumer industries such as dyeing and printing of the polyester.
If aggregates are present, the end-use properties including fastness, levelness and storage stability will be highly affected.
A fine and homogeneous dispersion is needed and dispersant additives are often used to increase the dispersion stability, solubility, leveling and fastness properties of the dyes [1-3].
These materials have many attractive properties such as low toxicity and good biocompatibility, biodegradable, and are widely used in pharmaceutical, medical, food and pesticide formulations.
The performance of these dye-polyether derivatives, which build a protective shell around the particles and prevent them from flocculating, also depends on a number of factors such as the molecular weight and the degree of hydrophilicity/hydrophobicity of the polyether.
Online since: June 2014
Authors: Min Zhang, Yu Xi Jia, Chuan Zhen Huang, Jin Long Liu
The Inverse Prediction for Profile Extrusion Die Based on the Finite Element Method Min Zhang1, 2,a, Chuanzhen Huang 1, 2, b, Yuxi Jia 3, c ,Jinlong Liu 1, d, 1School of Mechanical Engineering, Shandong University, Jinan 250061, China 2Ministry of Education Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Shandong University, Jinan 250061, China 3School of Material Science and Engineering, Shandong University, Jinan 250061, China a zhangmin2616@sdu.edu.cn, bsdu_huang2013@163.com, cjia_yuxi@sdu.edu.cn, dliujinlongfirst@163.com Keywords: Viscoelastic Fluid; Extrudate swell; Inversed simulation; Finite Element Method; Die design Abstract: Considering the extrudate swell, the polymer extrusion process was calculated by the inversed simulation based on the visco-elastic ecology theory.
There are so many factors, such as the material properties, molding temperature, and extrusion speed, which affect the results.
The area of the die lip is 21085.4 mm2.Compared to the product section area, 225600 mm2, the extruded swell ratio is 21.411%.Because of the extrudate swell affect, there are quite difference between the shape of the die lips and product section.
Online since: February 2012
Authors: Ajai Jain, Gian Bhushan, Mohinder Pal Garg
Gian Bhushan 3, c 1 Assistant Professor, Department of Mechanical Engg., M.
The experiments are conducted using one-factor-at-a-time approach.
Titanium and its alloys are considered excellent materials for their applications in aerospace and automobile industries because of their improved mechanical and physical properties like high strength, high strength to weight ratio, high toughness, corrosion resistance and oxidation resistance.
However these properties also make titanium and its alloys difficult to shape and machine into a precise shape and size.
The effect of this factor appears to very weak as compared to effect of TON and TOFF.
Online since: June 2011
Authors: Hui Xu, Jin Liang Huang, Li Hua Li, Ke Zhang, Yong Jun Gu, Xiao Wang, Qian Li, Xiao Hua Tan
Introduction Texture structured ceramics have attracted increasing attentions because of their improved properties compared with random ceramics.
It is reported that the template particles in the range of 5-50μm have been successfully used to fabricate textured ceramics; and enhanced anisotropic properties of so-synthesized textured ceramics, mimic the properties of single crystals of the same composition, can be obtained[7].
SrBi4Ti4O15/BaBi4Ti4O15 graded ferroelectric thin films prepared by sol-gel technique was also reported and the annealing conditions affected its optical properties greatly[13].
As mentioned above, although some investigations on the preparation of BBT have been published, the factors affecting the preparation of BBT templates are not mentioned explicitly.
It was well known in single crystal growth that the morphology of crystal is determined by two factors: (a) the crystalline habit and (b) the driving force for grain growth[16].
Online since: October 2014
Authors: Ting Zhi Liu, Hao Yu Wang, Shuai Li, Yuan Liu
Its initial properties were shown in Table 1.The COD and color of the water were 4181mg/l and 2541C.U..
Table1 Properties of the original APMP pulping effluent CODCr 4181mg/L Color 2541C.U. pH 7.4 Solid content 0.923% Suspended solids 170mg/L Turbidity 63NTU Effect of culture time on COD removal and Color Fig. 1 Effect of culture time on COD removal and color We first investigated the effect of culture time on the removal of COD and color.
The second was that an alkaline condition had a negative affecting on adsorption of color components of activated sludge, and had contributed to dissolution of organic matter.
The metabolic activity will affected by the temperature negatively while the temperature over or below the optimum temperature.
Compared to other influential factors, the culture time and activated sludge concentration were dominant.
Online since: October 2013
Authors: Yin Suo Dai, Jian Dang Ding, Yue Hu Tan, Xiao Jun Yuan, Chun Hua Lu, Zi Ming Gong
Successful grouting depends on grouting performance and material properties.
Markou et al. [10] studied the effect of many factors such as grain sizes, water to cement, superplasticizer, on effectiveness of cement grouting and compression strength and permeability coefficient.
Single fluid jet-grout strength and deformation properties [J].
Effect of superplasticizers on the rheological properties of cements [J].
Factors Affecting Engineering Properties of Microfine Cement Grouted Sands [J].
Online since: October 2015
Authors: Ciprian Firican, Iulian Riposan
The main development of high performance components include diesel engine blocks, automotive powertrains, turbo housings, exhaust manifolds and many other parts in which the combination of strength, weight and heat conductivity properties are of great importance.
Of the present production, iron castings represent more than 75% of all castings worldwide mainly due to the package of physical and mechanical properties associated with competitive costs.
The main shape factors used for evaluating graphite morphologies on 25 mm bar samples are presented in Table 3 and Figure 5.
The main shape factors used for graphite morphology evaluation No.
Destefani, ASM Handbook, 'Properties and selection: Irons, steels, and high-performance alloys', 1990, Vol. 01, pp. 100-120, Ohio, USA, Materials Park
Online since: June 2010
Authors: Takashi Goto, Takayuki Narushima, Hiroshi Kawamura, Kyosuke Ueda, Jun Kurihara
Finally, the factors that should be considered in fabricating biomedical coating films were discussed.
The crystallinity of the calcium phosphate coating films is one of the factors that determine the biological performance of the coated implant.
Factors Considered in Biomedical Coating on Metallic Biomaterials Figure 8 shows the factors that should be considered when fabricating biomedical coating films on metallic biomaterials by vapor deposition.
The high bonding strength between a coating and metallic biomaterial, which depends on the physical and chemical properties and surface morphology of substrates, is also a crucial aspect.
Fig. 8 Factors considered in the fabrication of biomedical coating films on metallic biomaterials by vapor deposition.
Online since: March 2017
Authors: Yung Chuan Chiou, Chao Ming Lin, Chun-Yi Chu
Investigating the Deformation, Breakage and Number on Conductive Particle of Flim-on-Glass Packaging Using Anisotropic Conductive Film Bonding Chao-Ming Lin*,1,a, Yung-Chuan Chiou2,b, Chun-Yi Chu3,c 1Department of Mechanical and Energy Engineering, National Chiayi University, Taiwan, R.O.C. 2Department of Biomechatronic Engineering, National Chiayi University, Taiwan, R.O.C. 3Department of Mechanical Engineering, WuFeng University, Taiwan, R.O.C.
This paper utilizes the microscope technology to investigate the bonding properties of the conductive particles, and consider the electrical resistance effects after packaging.
The results show the deformation shape, breakage type, and number of conductive particles will be quantitatively affect the electrical performances, and one can measure the area, diameter, and roundness of the deformed particles’ projection in the glass-side view to evaluate the ACF packaging quality.
During compression, the bonded pressure within the resin matrix is a major factor influencing the deformation and conductivity of the conductive particles.
Tsai, Mechanical phenomena of a new-type anisotropic conductive film adhering to the outer lead bonding.
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