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Online since: December 2012
Authors: E.M. Mahdi, Meor Yusoff Meor Sulaiman, Paulus Wilfred, Mohd Hamdi Abdul Shukor
Each of these factors is crucial to the properties of the resulting TiO2.
These impurities will usually embed themselves in the Ti-O matrix in the form of subsitutional impurities, altering properties such as mechanical strength, band gaps and reactivity [16-18].
Optical Characterization of both commercial nano-TiO2 and nano-TiO2, with a) absorbance spectrum and b) transmission spectrum It is well established in [19] that the structural properties influence the optical properties of nanoparticles.
Due to its inverse relationship with absorbance, transmission is also affected by the same structural factors as absorbance, only differently.
Mao, Titanium Dioxide Nanomaterials: Synthesis, Properties, Modifications, and Applications, Chem.
Online since: April 2012
Authors: Yin Long Xing, Chun Fang Liu, Tong Wang
By designing fuzzy adaptive controller to adjust the scale factors of speed and position controller in time, ensure the robustness of a single suspension system.
This not synchronization suspension will arouse mechanical couple, it will affects the quality of work-piece, in severely, the work-piece may be scraped.
It will lead to beam tilt, affects machining accuracy.
For the output response, due to the structural properties of the system is symmetrical, the role of system structure for each output response is the same.
Online since: October 2010
Authors: Yong Lu, Chong Qiang Huang, Tian Yang Wang
FEM Analysis on the Performances of HSK-E50 Toolholder-Spindle Interface Yong Lu a, Chongqiang Huang b, Tianyang Wang c School of Mechanical and Electrical Engineering, Harbin Institute of Technology, Heilongjiang, Harbin, 150001, China a luyong@hit.edu.cn, bhuangcongqiang85@163.com, charbeer1986@hotmail.com Keywords: Toolholder-Spindle Interface, Finite Element Method (FEM), Interference, Clamping Force Abstract.
Then calculated the stress distribution of toolholder-spindle interface respectively effects by the spindle speed, interference and pull in force and finally find out how this three factors influence the connection characteristics of HSK-E50.
In addition, all bodies are considered to be elastically deformed, with the following physical properties: Young's modulus E = 206 GPa, Poisson's ratio v = 0.3, density ρ = 7.86 × 103 kg/m3, the coefficient of friction f = 0.2.
To find how it affect the connection characteristics of toolholder-spindle interface, the FEM model is simulated with pull in force on 11KN and 20KN in the case of interference value set as 6um.
Online since: October 2014
Authors: Gai Fei Peng, Juan Yang, Jing Yan Wang
Physical properties of coarse aggregates were shown in Table 1.
Properties of Recycled Coarse Aggregate and Its Influence on Recycled Concrete.
The Characteristics of Mechanical Properties of Recycled Aggregate Concrete and Influencing Factors [D].
Mechanical Properties of Recycled Aggregate Concrete with Fly Ash and Slag.
Concretes with Aggregates from Demolition Waste and Silica Fume, Materials and Mechanical Properties.
Online since: September 2015
Authors: Piotr Penkała, Katarzyna Kiryczuk
The implant prosthesis is used in the treatment of lesions within the joint or damage caused by mechanical stress.
The main factors are disease, that indication for arthroplasty include: rheumatoid arthritis, advanced degenerative changes, fractures proximal epiphysis of the femur and femoral head necrosis.
Although the X-ray is used, the same property of X-rays and is done mostly in two sections, which is associated with a too small amount of information for faithful reproduction of anatomical structures in the solid model.
Longitudinal section through the model of the femur with the selected cross-sections of the Medullary canal included in the shape of a rod Proper selection of the neck angle to the stem allows the correct settings of the limb to the trunk, which provides not only the proper function of the hip joint, but also the proper affects functioning of the knee.
Crisp, The Medical Devices Directives and their impact on the development and manufacturing of medical implants, in: Proceedings of the Institution of Mechanical Engineers Part H Journal of Engineering in Medicine, 210 (1996) 233-239
Online since: November 2013
Authors: Marek Kočiško, Stanislava Šoltésová, Petr Baron
Pattern for calculating of risk number: R = M x U – P x (M/30) (1) Where: R – is final value of risk number M – risk factor caused by machine U – risk factor caused by environment P – factor of person’s capability to handle the risk Value of coefficient which are assigned to each item of reviewed factors are from exactly defined intervals, even when sensitivity of scoring scale depends of specific conditions and lonely reviewers [11].
When we valuate chosen system (machine, activity, work space etc.) such properties, characteristics and aspects are identified which may be possible cause of damage, accident, health treat or other negative event.
Solitary selection of these variables for mentioned criteria of reviewed factors machine, work environment, human element is accessible only after confirming Edit button form menu of this form.
In frame of capability of person to handle the risk examination, following criteria regarding operator qualification, physical and mental factors and work organization are revied.
Among mental factors which may generate danger belong: · work load · spaciousness of workplace · influence of conflicts on workshop · influence of decision in affect · reactions in emergency situations During valuation of physical and mental factors mental and physical suitability of person for responsible work is examined.
Online since: December 2022
Authors: Muhammad Zaimi Zainal Abidin, Mohd Nur Azmi Nordin, Nik Mohd Ammar Zhafran Nik Ruzi, Mizah Ramli, Fadhli Syahrial, Mohamad Shukri Zakaria, Jeefferie Abd Razak
The presence of cellulose, which is hydrophilic in nature, lessens the mechanical properties of the bio-composites by increasing water uptake into the composites or also may affect the interfacial bonding between the polymer matrix and the fibers because the matrix is hydrophobic.
Introduction Polymer coating has become an important part of many applications and attracted much attention because of its unique properties.
Based on the finding from the literature, the number of coating layer and the duration of dipping becomes critical factors that contribute to the coating behaviors.
This might be due to the rise of coating thickness as discussed in the literature [11] where the thickness of the coating affects the water contact angle (Fig. 5 and Fig. 6).
Kondo, Dual-layered-coated mechanically-durable superomniphobic surfaces with anti-smudge properties, J.
Online since: November 2013
Authors: Lian Fa Yang, Yu Lin He, Ning Hua Wang
The accuracy of constitutive equation is a key factor in the research of material mechanism, finite element simulation accuracy and forming failure.
The establishment of constitutive equation is significant for the research on material properties, material plastic forming mechanism and forming failure.
In 2010, Zhan et al. [2] cut standard parent specimens and mixed material specimens, which were divided with weld and heat affected area, from welded tube for the tensile test.
The constitutive equation obtained from this method is more accurate to reflect material properties than the tensile test.
The theory analysis can accurately determine constitutive equation, but the using of assumptions will affect the precision of constitutive equation in the process of research.
Online since: December 2018
Authors: Michel Perez, Veronique Massardier, Gwenaelle Meyruey
Characterization and Modelling of the Precipitation Sequence of an Al-Mg-Si Alloy with Silicon Excess for the Prediction of the Mechanical Properties during Ageing V.
Namely, the silicon excess affects the size, number, density and distribution of the b’’ precipitates and reduces their Mg/Si ratio.
However, the decrease in mechanical strength after the peak (i.e. the over-ageing) occurs much more rapidly in the case of the High Si alloy.
It can be reminded that the classical relation used in KWN model for the nucleation rate is: dNdt=N0Zβ*exp-∆G*kbT1-exp⁡-tT with N0 the nucleation site density, Z the Zeldovitch factor, β* the condensation rate, T the temperature, t the time and kbthe Boltzmann constant.
It gives access to the mechanical properties of the overaged alloy with a good accuracy.
Online since: April 2021
Authors: Qiu Ming Wan
Composite materials show many excellent properties that traditional materials cannot achieve.
It determines that the structure and principle of the acoustic metamaterial will be not to seek the anti-electromagnetic response of the medium, but the abnormal mechanical vibration of the mechanical properties.
Thermal Metamaterial Due to the prosperous development of the metamaterials, their ideas soon spread from the initial light wave to the sound wave, mechanical wave and fluid, reflecting a variety of strange properties and applications.
The thermal concentrator can gather the heat flow in a specific region, and make the temperature gradient in the middle region rise without affecting the temperature distribution in the outer field.
Depending on its singular properties, thermal metamaterials will be widely used in the future.
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