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Online since: June 2008
Authors: Yuri Estrin, Sergey V. Dobatkin, Rimma Lapovok, L.L. Rokhlin, Tatiana V. Dobatkina, N.I. Nikitina, Mikhail V. Popov, V.N. Timofeev
Structure and Properties of Mg-Al-Ca Alloy after Severe Plastic Deformation S.V.
The possibility of increasing the strength of the alloy in the UFG condition by a factor of 1.5-2, combined with a reasonable level of ductility and enhanced functional properties was thus demonstrated.
ECAP of annealed Mg-Al-Ca with the formation of UFG structure was shown to lead to increased yield strength (by a factor of 2) and enhanced tensile ductility (by a factor of 3).
Magnesium-based alloys are light-weight structural materials and their strength properties are of great importance.
Mechanical properties (a-YS; b-EL) of Mg-0.49%Al-0.47%Ca alloy at Ttesting = 20 o C and 160 oC (shaded) after different treatments: 1 - annealing; 2 - quenching; 3 - annealing + ECAP at 300 o C; 4 - quenching + ECAP at 300 o C; 5 - extrusion + ECAP at 300 o C.
Online since: April 2015
Authors: Xiang Li, Wei Feng Li, Liu Yun Xu
In the process of analyzing of mechanical behavior, many influence factors need to be considered, such as surface load, mode of soil, model of pipe, interaction between pipe and soil, etc.
The surface load mainly affects the local region under the acting surface of the soil. 4.3 Analysis of influence factors The surface load makes PSP having an elliptical deformation through the soil, which makes local area of the PSP in a high stress state.
To analyze the mechanical properties of PSP under non-axis symmetric surface load and their main influence factors, it is necessary to do research on internal pressure, properties of overlying soil, geometry parameters of PSP and surface load, etc. 4.3.1 Inner pressure A serial of inner pressure, ranging from 0.5MPa to 4MPa, are used to analyze the influence of inner pressure on PSP under the non-axis symmetric surface load.
Analyses on the short-term mechanical properties of Plastic Pipe Reinforced by Cross Helically Wound Steel Wires.
Experimental Investigation on Mechanical Properties of Plastic Pipes Reinforced by Cross Helically Wound Steel Wires.
Online since: March 2012
Authors: Bing Chen, Changjiang Wu, Yu Guang Fan, Bin Feng
Through the passivation experiment, we have done research on the impact that the change of concentration of Cl- and Na+, the temperature, pH of Na+, has on 304 stainless steel properties.
Orthogonal experiment Arrangements of Corrosive Factors.
The experimental design of four major corrosive factors was preceded.
Three levels of all factors are shown in Table 1.
The chloride ion concentration does not affect △S.
Online since: August 2013
Authors: Jing Na Sun, Tao Xue, Zhi Yuan Guo
Introduction Rolled magnesium alloy sheets are promising light-weight structural materials due to their excellent properties and large strength-to-weight ratio which are potentially suitable for applications in many industrial areas [1].
It has been documented that the microstructures, mechanical properties and texture evolution of Mg alloys are highly dependent on their primary deformation process, such as cross-rolling [4], different-speeds rolling [5], ECAP and ECAR [6].
It affects the mill set-up schedule, the thickness of the rolled metal, and the final product profile.
Rolling force is affected by many factors such as friction, metal properties and rolling deformation which show serious nonlinear relationship.
Chinese Journal of Mechanical Engineering.
Online since: August 2008
Authors: Shu Hsing Chen, Cheng Ho Li
This work applies this technique to study the changes of intracellular properties in response to environmental changes.
Introduction A typical application of dielectrophoresis is for distinguishing particles through their electric properties.
However, many factors with mechanical or electrical origins affect the motions of particles.
To extend the applicability of dielectrophoresis, further studies on those factors are needed.
Many factors, including those of mechanical and electrical origins, affect the motion of organelles.
Online since: November 2013
Authors: Wei Guo
The particle motion and power theory analysis of centrifugal field Wei Guo1, a * 1School of Mechanical Engineering, University of Jinan, Jinan250022,China agw420@126.com Keywords: test machine;particle motion;numerical analysis Abstract.
This paper discusses accelerated stress conditions of ore particles in the vertical impact test machine rotor passage through numerical analysis method, and to determine the relationship between the movement of particles and the power and the machine parameters.The results show that:In the test machine rotor, motion law of ore particles is determined, and by expression for the particle displacement, speed and power of the numerical analysis method.If the test machine, gravity effects are negligible;Speed is the main factor affecting the characteristics of particle movement, but should not exclude the influence of particle volume and surface quality;Chasing is never occur in the process of particles;With calculated by the theoretical formula of reasonable size of rotor.
Introduction The vertical shaft impact crusher with cubic energy consumption and product performance and Lower energy consumption, now in various gravel field is widely used, has replaced the other sand making equipment[1].But because the characteristics of technology and properties of its own, resulting in accelerated process of granular complex.In addition, the working environment of the extensive also determines the acceleration of particles is uncertain, the production efficiency and product quality to influence directly, because many crusher manufacturers and researchers pay enough attention.They focus on the principle, the performance of the ore particles impact crusher crusher[2-3], understand the dynamic characteristics and impact angle and particle size effect on impact results, the particle breakage reason and crushing manner, to determine the impact results.
The expression can know, speed is the main factor affecting the characteristics of particle movement, the rotor speed is greater at the same time particle moving distance; particle acceleration in never chase phenomenon.
Online since: October 2006
Authors: Jan Luyten, Jan Schrooten, Jos Vander Sloten, Tim Van Cleynenbreugel, Saartje Impens, Astrid Bakker, Frank P. Luyten
Such a screening should be based on the knowledge of mechanical, physical and (bio)chemical scaffold properties and their interaction with cell behaviour.
The global objective of this project is to gain substantial knowledge about guided bone regeneration, which is defined as the formation of new bone in the presence of artificial structures (inert, biodegradable or biologically activated) that contain bone stimulating factors (osteogenic cells, growth factors, …).
Altering the sintering temperature will influence the final mechanical and structural scaffold properties.
The mechanical properties of the Ti scaffold allow a load bearing application.
As an example a selection of properties is shown in Table 2.
Online since: January 2011
Authors: David Benavente, Anna Arizzi, Giuseppe Cultrone, Javier Martínez Martínez
The aim of this work was to link the microstructure of six different types of mortars with their mechanical properties during early carbonation ages (7, 15 and 60 days).
For that, micro-compressive essays were performed on micro-samples of each mortar and their behaviour was related to the textural properties studied at the same time intervals.
In Table 1 it is possible to observe the mechanical properties (strength and elastic modulus) of each mortar type, as well as its evolution during the carbonation process.
Porosity changes during the curing process do not involve significant variations in the mechanical properties of mortars with calcite aggregate.
Conclusions This study confirms that the carbonation process affects positively the mechanical properties of mortars, by producing an increase of strength of these materials, always higher in the external zone which is the most carbonated one.
Online since: December 2010
Authors: Yaozhi Luo, Ruo Fei Tong
For certain upper truss, the main affect factor of dynamic characteristics of a TSS are prestress of the cables, pole number, rise-span ratio and vertical span ratio.
In this paper, the mode testing experiment and finite element analysis is executed, to study the changes of the lower modal frequencies in different prestressed cables and to study the influence of the prestress to the dynamic properties of TSS.
With similar geometry and mechanical properties, these two type are all referred as string structure [1].
To certain truss, the main affect factor of dynamic characteristics of TSS is prestress of the cables, the pole number, rise-span ratio and vertical span ratio.
In this paper, the mode test experiment and finite element analysis is executed, to study the changes of the lower-order modal frequencies in different prestressed cables and to study the influence of the prestress to the dynamic properties of TSS.
Online since: May 2017
Authors: Abdelkader Djebli, Benhamena Ali, Bachir Bouiedjra Belabbess, Baltach Abdelghani, Aid Abdelkarim
Several searches have been conducted in the past, and continue to be until the present time to improve the parameters affecting the effectiveness of the composite patch repair.
The material properties of the 2024-T3 aluminum alloy plate, the Carbon/epoxy composite patch and the FM-73M adhesive are regrouped in table 1.
Table 1 Material properties.
The subscript p is used to distinguish properties of the patch composite.
Sih, Handbook of stress-intensity factors.
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