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Online since: June 2007
Authors: Hiroyuki Kawada, Souta Kimura, Takayuki Hama, Jun Koyanagi
Introduction Mechanical properties of fiber-reinforced plastics (FRP) are strongly dependent on a control of the adhesion between the matrix and fiber.
The coefficients A and B are functions of the elastic and plastic properties of the constituents given by Okabe and Takeda [5].
The coefficients 1β and 2β are functions of the elastic and plastic properties and the geometric factors of the constituents given by Okabe and Takeda [5].
The mechanical properties of the fiber and matrix are listed in Table 1.
Fig.3 Size and dimension of specimen E (GPa) Poisson's ratio ν c (10 -6K -1) 2a (µm) Carbon 377 0.2 - 5.2 Epoxy 3.00 0.4 65.0 - Table 1: Mechanical properties of fiber and matrix Results.
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: August 2011
Authors: Jin Mei Dong, Qian Qian Liu, Hongfa Yu
Accelerated aging procedure and SIC test method have been used to determine the mechanical property of glass fiber reinforced magnesium oxychloride cement (GRMC).
The mechanism of mechanical property degradation has been concluded based on the analysis of testing data.
Mechanical property degraded because of the formation of leptophyllous Mg(OH)2, the looseness of interface region of matrix and glass fiber and corrosion of glass fiber.
Hydration product, microstructure and corrosion degree of glass fibers have been analyzed in the oxychloride magnesium cement matrix by XRD and SEM in order to study the reason of mechanical property degradation.
The mechanism of mechanical property degradation has been concluded based on the analysis of testing data.
Online since: December 2012
Authors: Tao Wang
While Hooke's law is the foundation for the mathematical modeling, drill site conditions such as ground formation, borehole design and drilling process will be defining the factors and parameters in the formula.
Considering the influence of deviated pipe thickness and the use coupling joints, it is applicable to adjust the value of operational factors along with proper drill string parameters [2]. 2.
All this will affect the accuracy of the calculation.
Therefore, we will not go into details in this article about how to decide these two factors.
The K-factor is related to the characteristics of the drill string, such as pipe specifications, material standard and mechanical properties, which can generally be determined by calculation in advance [4].
Online since: March 2015
Authors: Hussein Mohamed Hussein, Shailendra Kumar, Sachin Kashid
Selection, Modeling and Prediction of Life of Stripper of Compound Die Sachin Kashid1,a, ShailendraKumar1,b and Hussein Mohamed Hussein2,c 1Department of Mechanical Engineering, S.V.
National Institute of Technology, Surat, India 2Advanced Manufacturing Institute, King Saud University, Riyadh - 11421, Saudi Arabia, and Mechanical Engineering Department, Faculty of Engineering, Helwan University, Cairo, Egypt akashid32@ gmail.com, bskbudhwar@med.svnit.ac.in, chmahuss@hotmail.com Keywords: Sheet metal, Knowledge based system, CAD Abstract.
Various factors affecting life of stripper are investigated through FEM analysis and the critical simulation values are determined.
Proposed ANN model for prediction of life of stripper The life of stripper depends on various factors such as sheet thickness, sheet material, stripping force.
In Ansys workbench software user needs to enter properties of stripper material.
Online since: August 2017
Authors: Juana Coello, Nuria Medina, Valentín Miguel, Alberto Martínez-Martínez, María Carmen Manjabacas
For that, turning processes were carried out on two different materials since their physical and mechanical properties have a relevant influence on the chip formation.
Although many factors influence on chip type, in the experience herein described only the feed rate is considered.
The camera is positioned in such a way that the complete material cutting process is viewed in order to analyse the different factors associated with it, as shown in Fig. 1.
Test strategy design The different tests were defined for two materials that presented very distinct physical and mechanical properties.
All these factors can affect the final finish of workpieces to a greater or lesser extent.
Online since: October 2010
Authors: Nan Sang
ABAQUS can be done not only single components of the mechanical and multi-physical field analysis, but also can be done the complexity of system-level analysis and research at the same time.
High or low credibility of FEA results are directly affected by the analytical model, load handling, constraint conditions and the actual mechanical properties of engineering structures in line with the degree of impact, FEA model to establish when it is necessary to accurately reflect the actual structure of the important mechanical properties, but also less as far as possible the unit cell and simple form, in order to ensure higher accuracy and to reduce the scale of problem-solving.
This is generally taken to include geometric modeling, the definition of material properties and it is constant (according to the geometric properties of unit to set up, some units there is no real constant), the definition of cell type, mesh, add constraints and load, etc [3, 4].
The boundary constraints imposed whether it is reasonable will directly affect correctness and rationality of analysis results.
Therefore, the components strength lies in the size not merely the size, its structure quality is affects its strength and the rigidity extremely important factor.
Online since: December 2010
Authors: Wei Jun Yang, Deng Xiang Zhang
Introduction Cement hydration is a physical and chemical process that the cement components and water react with each other, it is very complicated process affected by water-cement ratio, cement chemical composition, fineness, temperature, humidity, additives and other factors.
The study of hydration of concrete not only has a high theoretical value, but also the hydration mechanism of hardening pastes directly affects the microstructure and the development of various mechanical properties of concrete, and further affects cracking resistance, durability of concrete.
Laboratory method requires good laboratory conditions, and the results vary widely because of many influencing factors.
However, the study work of cement hydration is very difficult due to the complex components of cement and so many influencing factors.
After the ANNs was trained in the 37 training cases, it was tested to see how well it would recognize various material properties.
Online since: August 2020
Authors: Ivan Holly
Real concrete structures are affected by environmental conditions.
The bond between GFRP and concrete is influenced by several factors: surface shape and mechanical properties of reinforcement (CNR-DT 203/2006) [6] as well as rebar diameter, concrete compressive strength, anchoring length and confinement of reinforcement [7].
Tab. 1 Geometric and mechanical properties of GFRP reinforcement Diameter [mm ] Tensile strength [MPa] Modulus of elasticity [GPa] 15.5 1069 54.7 Tab. 2 Concrete specification Test day Compressive cube strength [MPa] Modulus of elasticity [GPa] 3 19.83 37.8 28 45.92 38.5 Experimental Set-Up and Testing Procedure The cube forms with 200 mm side were used as a mould for concreting of each concrete sample, see Fig. 1a.
As the slip of the bar increases, the mechanical interlocking increases considerably.
M., Investigation of Bond Properties of Glass Fibre Reinforced Polymer Bars in Concrete under Direct Tension, Master´s thesis, Department of Civil Engineering, University of Toronto, (2012)
Online since: November 2011
Authors: I. Bravo-Imaz, A. García-Arribas, E. Gorritxategi, M. Hernaiz, A. Arnaiz, J. Terradillos, J.M. Barandiarán
Among others, one of the most remarkable properties of this sensing principle is the capability of being used through a wide viscosity range.
This is the reason why oil must be replaced before it loses its lubricant properties.
But the aging process of the oil is not the same in all circumstances, because lots of variable factors are involved (environmental, fuel quality…), so the preventive maintenance is normally conservative and usually leads to premature oil changes.
Viscosity is one of the most important properties for a lubricating oil to accomplish its mission.
Experimental Magnetoelastic materials display a coupling between their magnetic and elastic properties.
Showing 13461 to 13470 of 26166 items