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Online since: March 2014
Authors: Istikamah Subuki, Muhammad Hussain Ismail, Ali Nurul Huda
Rheological Properties of Hydroxyapatite Synthesized Clamshell mix with Palm Stearin Binder System Istikamah Subuki1, a, Nurul Huda M.
Some of the critical issues by such process are inhomogeneity of the powder mixture which originated from many factors, such as powder shape and size, fraction and binder selection [8].
The desired rheological properties include low viscosity, low activation energy, consistent flow index and low yielding stress [11].
Owing to high viscosity for the synthesized HAp, mainly originated from the bimodal powder system, greater heat input was desired to get the optimum rheological properties.
Sapra: National Conference on Advancements and Futuristic Trends in Mechanical and Material Engineering (2010)
Online since: August 2013
Authors: Yi Zhang, Cai Li Zhang, Xiang Meng, Guo Qin Cao, Chuan Shuai Li
Introduction Magnesium and mg alloys have some advantageous properties that make it an excellent choice for a number of applications.
These properties make it valuable in a number of applications including automobile and computer parts, aerospace components, mobile phones, sporting goods, handheld tools and household equipment.
The factors of hydrolysis temperature, coating times, calcinations temperature and time were investigated in orthogonal experiment.
The level and factors is shown in the Table1.
However, its influence intensity is lightest in the factors.
Online since: July 2013
Authors: Zi Xu Wang, Chao Li, Jia Hong Zhang, Hua Gang Xie
In order to obtain the mechanical parameters, using 70.7 × 70.7 ×70.7mm mould to do eight groups of small specimens.
After 28 days, testing the small specimens with the Changchun Research Institute for Testing Machines Co., Ltd(CRITM) producing the CSS-55100 electronic testing machine, and through MTS's latest version of Test Works 4.0 software to collect, calculate and so on, getting physical and mechanical property parameter, the test results meet the similarity criteria, in Table 1.
Chose one unit from this area to analyze mechanical phenomena.
According to the rock fracture mechanics, fracture propagation process in its tip stress intensity factors[5] (7) Where, - quasi-static pressure, GPa; -fracture length, mm; -shot hole radius, mm; -stress intensity factor correction factor.
Blasting Effect UT Analysis Fig.2 Complex cutting seam cartridge The rock elastic wave velocity reflects the physical and mechanical properties of rock.
Online since: October 2009
Authors: Yan Chyuan Wu, Jenq Huey Shyu, I Tsung Lai, Ta Chang, Yun Cheng Wang, Hao Yi Lu
On the Firing Test Properties of Thinfilm Metallic Initiators Jenq-Huey Shuy 1, a , I-Tsung Lai 1,b , Ta Chang1,c, Yun-Cheng Wang1,d , Yan-Chn Wu1,e , and, Hao-Yi Lu1,f 1 Institute of Mechanical and Electrical Engineering, National Taipei University of Technology, 1,Sec. 3, Chung-Hsiao E.
The aim of this study was to investigate the firing test properties of NiCr alloy thin film bridge electro-initiators(detonators).
The purpose of the test is to explore how the process parameters of the thin film bridge detonator such as bridge shape, resistance etc. influence the firing properties of the electro-detonators and verify the firing properties with the firing test equipments.
Therefore, it is concluded that the bridge is the dominant factor influencing firing time.The different bridge connector shape in this sample group indicates the contact type between the two polars of the thin film bridge and the detonator GMS (pin and ring), and this factor does not affect the bridge width, thickness and length unless ectopic migration occurs in the bridge plating; in addition, it l w Substrate Thin film bridge Pin Ring should be noted that in the article the bridge area indicates the bridge shape area, the area of length x width, with the actual heating area ,which is relevant to the bridge thickness, being the total of the six side cross-sectional areas, and this applies to the next groups unless otherwise specified.
Fig.7 Function time vs. resistance Fig.8 The picture of GMS firing test Conclusion The research preliminarily verifies that the detonator (1.1~1.4Ω) firing time is about 180~200μs and that the shortest firing time is 120μs (3.165Ω).After the comparative study of the test, the factor influencing "firing function time" may be verified and deduced, and besides the "electronic heat power effect" and "resistance", it is also found and verified in the test that "bridge area" is the dominant factor influencing "firing function time" with the far greater influence than the "resistance" factor because of the "surface area heat dissipation effect" of the thin film.
Online since: December 2010
Authors: Ying Ren Zheng, Lian Zhuang Huang, Gang Chen, Tian Wen Dong
The judging condition and the safety storage factor (SSF) of SRM were built.
For the strength reduction of limit analysis finite element method (reduced the strength of material around, shortened as SRM) is used to research the ultimately loading of foundation in the papers, and some complex problem, example for the plastic-elastic deformation, the big deformation of geometrical body, the big stiffness grads and the interface mechanical properties, are synthetically taken into account.
The safety storage factors (F) of pile foundation was determined by the previous reduction value of the inflexion of F-s curve and the tine of V type of F-Qu curve when the pile top was done the ultimately load.
In the basis of unchanged the material property of ground, the method of changed material property of contact element was used to solve the influence.
The reduction factor-settlement curve (F-s curve) and the reduction factor-point resistance curve (F-Qu curve) were respectively in Fig.3 and Fig.4 by SRM.
Online since: August 2014
Authors: Ziaul Rehman Tahir, Parthasarathi Mandal
Asymmetric meshing affects predicted buckling load, buckling mode shape and post-buckling behaviour.
Asymmetric meshing affects only the stiffness matrix K and does not affect the loading vector F in F = Kx relationship.
The mechanical properties of CFRP are: Elastic modulus E11=52000 N/mm2, Elastic modulus E22=52000 N/mm2, Shear modulus G12=2350 N/mm2, Poisson’s ratio n12=0.302.
The load factors for AMTs AT1, AT2, AT3 and AT4 were 0.970, 0.956, 0.954 and 0.953 respectively.
The load factors for AMTs AF1, AF2, AF3 and AF4 was 0.957, 0.943, 0.940 and 0.939 respectively.
Online since: January 2010
Authors: Sandra M. Luz, Paulo M.C. Ferrão, C. Alves, M. Freitas, Armand Caldeira-Pires
To achieve the goals of this study, the tensile and flexural properties and Life Cycle Assessment (LCA) as a function of fiber content were performed.
Besides the good mechanical properties, natural fiber composites showed great environmental performance during the entire life cycle, mainly in the cultivation phase, when sugarcane consumes carbon while growing, contributing to global warming decreases.
By-products, like sugarcane bagasse, can be considered either as waste, affecting the environment, or as a resource when an appropriate valorization technology is implemented.
[8] ASTM D 638: Standard test methods for tensile properties of plastics (Philadelphia 1988)
[9] ASTM D 790: Standard test methods for flexural properties of unreinforced and reinforced plastics and electrical insulating materials (Philadelphia 1988)
Online since: February 2016
Authors: Ioan D. Marinescu, Hao Liu, Omar Bafakeeh, Long Zhao
All these three factors determine the material removal rate in the grinding process.
The lubricating properties of fluid affect the surface roughness directly.
The fluid’s physical and chemical properties will be studied to explain the different performances.
As a semi-synthetic fluid, TRIM® SC520 has similar properties to TRIM® C270.
Its viscosity is less than soluble oil, providing better settling and cleaning properties.
Online since: March 2007
Authors: Kwang Seon Shin, Sung S. Park, Jung G. Lee, Dae H. Kang, Nack Kim, Geun Tae Bae
Microstructure and Mechanical Properties of Twin-Roll Strip Cast Mg Alloys S.
These alloys were subjected to various thermo-mechanical treatments and their tensile properties were evaluated.
Mechanical Properties.
Discussion There are several factors which control the solidification microstructure, e.g., freezing range and degree of superheating (temperature gradient).
Presence of fine intermetallic particles in the microstructure is quite beneficial for mechanical properties.
Online since: June 2011
Authors: Mostapha Tarfaoui
The Abaqus computer code is used. 2D Modeling of the joint The mechanical and geometrical properties of the adherents and adhesive are given in table 1.
The properties of the ply are given in table 3.
However, it is not an easy task to determine the degraded properties of damaged material with certainty.
Those are affected by other factors like the density of crack, which complicates the execution of the numerical methods in macroscopic modeling of damage.
The material properties of the laminated composite were defined to be dependent upon two field variables
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