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Online since: May 2011
Authors: Yi Juan Liao, Li Cheng Huang, Xiao Ting Xiao
The material flow in the deep-drawing process and the factors that affect the flow were described, and the relationships between the factors and formability were also analyzed.
Its mechanical properties are shown in Table 1.
Table 1 Materal properties of SUS304 Youngs modulus 207Gpa Mass density 7.85g/cm3 Poissons ratio 0.28 Anisotropic coefficient 1.02 Results analysis Material flow: Draw-in values of different constraint degrees were shown as Fig.4.
References [1] Daxin E and Gaoer Shuiye, in: Journal of Mechanical Engineering. 2003, 39(4)49-52.
[2] Yuanzhong Wang, Dingfu Dong, Fufang Yu, in: The learned journal of Mechanical Engineering. 2005, 12(3)46-50.
Online since: June 2006
Authors: Yiu Wing Mai, Yao Gen Shen, Chun Sheng Lu
Relative to some traditional methods, mechanical properties of thin films can be determined directly from indentation load-displacement curves without need to image the indent impression.
Recent progress has shown that nanostructured thin films exhibit excellent mechanical properties that differ significantly from those of their components in bulk forms.
Nanoindentation test largely facilitates the measurement of mechanical properties at the micro- and nano-meter scales.
In addition to the lack of an absolute definition of hardness, many factors may affect the measured results of hardness and elastic modulus, which include external factors such as indenter geometry, tip rounding, machine compliance etc.; and material-related factors such as surface roughness, size effect, residual stress, coating thickness, substrate etc [1-3].
In Ti1-xAlxN thin films, no consensus has been reached on the influence of Al addition to TiN compound and the relationship between structures and their mechanical properties.
Online since: October 2014
Authors: Teresa Stryszewska, Stanisław Kańka
Insertion of salts into the ceramic materials of bricks causes a gradual loss of the original properties of the material.
As a very important factor that affects the stability of ceramic brick is its porosity, pore structure determination was performed by mercury intrusion porosimetry.
These three groups of body properties depend on raw material composition and technological process, especially heat treatment.
Materials and methods The research enabling an assessment of microstructure changes in the environment of magnesium sulphate was carried out on two types of ceramic porous materials E and B of different texture and physical and mechanical properties.
The selected properties of materials under investigation are presented in Table 1.
Online since: August 2012
Authors: Zheng Jian Li, Yan He
The detection and reinforcement of a flyover by fire Zhengjian Li1,a, Yan He1,b 1School of Civil Engineering & Architecture, Jiaozuo University, Jiaozuo, Henan, 454003,China a jzdxlzj@163.com, b anyihe@163.com Keywords: concrete bridge; fire; injury-testing; reinforcement; assessment Absract: Against the characteristic of the concrete bridge suffered from the fire, with an engineering example, some methods of detecting and estimating the damaged bridges are introduced in the paper, and the treatment plans for reinforcement are put forward, a useful reference for dealing with the concrete bridge with similar diseases. 0 Foreword The concrete bridge by fire, with a big change in mechanical features of the materials and different degrees of destruction in its structure, will not be reused until it is reinforced.
So it is a feasible way to restore the strength by reinforcement. 4 Einforcement design 4.1 The recommended plan of Preliminary strengthening Comprehending the site factors and after the various contrast demonstrates, we decide to choose the composite materials -- Fang Ren Glass Cloth to reinforce the structure【4】.
So we can get that it has good flexibility restore ability. 6 Conclusion After reinforced concrete bridge suffered the fire, the mechanical properties of materials will in great change, from the view of static force, it mainly includes: strength dropping causes to the decrease of the bearing capacity; Stiffness changes causes to the larger deformation, and then affect the normal use of the bridge.
"The buildings diagnosis and treatment after fire" [M], nanjing, jiangsu science and technology press 1994· [3] Wu Bo, "The mechanical properties of the reinforced concrete structures after fire" [M], Beijing: science press 2003 [4] Song Zhiyuan.
Online since: August 2004
Authors: M.L.Q. Andrade, S. Manrich, L.A. Pessan
Transport Properties and Solvent Induced-Crystallization in PET and PET-Clay Nanocomposite Films M.
Improvements have been reported in the barrier property [2], thermal stability [3] and tensile properties [4] in polymer-clay nanocomposites.
This morphology makes all the surfaces of the layers available for the polymer, maximizing polymer-clay interactions, which may lead to dramatically modified mechanical and physical properties [5].
Thermal properties of PET and nano-PET samples.
The transport properties were not affected by the incorporation of clay.
Online since: November 2013
Authors: Jian Quan Tang, Xian Yin Qi
Introduction Roof abscission layer is the unified external behavior of comprehensive action of ground stress, the mechanical properties of surrounding rock, rock structure, and anchor strengthening coefficient, roadway section and other factors, it is an integrated index which can predict the roadway stability and get all the attention at home and abroad in recent years.
Main Factors Influencing Roof Abscission Layer (1) In-situ stress In-situ stress is the basic reason for deformation and failure of roadway surrounding rock, with the increase of stress, elastic displacement, plastic displacement and dilatancy displacement of surrounding rock is a growing trend
(2) Rock mechanical behaviors Rock mechanical behaviors have important influence on roadway stability of surrounding rock, the higher mechanical parameters of surrounding rock, the smaller the deformation of roadway and the greater the roadway stability
(6) Size of chain pillars Size of chain pillars determines influence degree of the residual abutment pressure of adjacent goaf, which is the important influence factor of roof abscission layer.
(3) The critical value of roof abscission layer is affected by many factors.
Online since: August 2013
Authors: Sigit Pranowo Hadiwardoyo
The bitumen has properties that are sensitive to changes in temperature.
Rutting is believed to be affected by several properties of asphalt concrete (AC) in addition to temperature and loading effects.
The key factors that affect rutting must be identified to minimize the potential for rutting and to optimize the design process by modifying these important factors [2].
Table 1 Aggregate Properties No.
The curve illustrated in Figure 1 shows each loading cycle for the two types of asphalt concrete mixtures with different asphalt properties.
Online since: March 2006
Authors: J. Gerardo Cabañas-Moreno, Heberto Balmori-Ramírez, Francisco Cruz-Gandarilla, R. Gayosso-Armenta
The Transformation of Co-Rich Alloys Produced by Mechanical Alloying F.
Whichever the case, these results do not affect the main conclusions derived from the present study.
The fact that no singlephase Co2Ti specimen has been produced in the present work (or reported elsewhere, as far as we know) by heating mechanically alloyed mixtures with the corresponding compositions could be considered a result of a lack of compositional homogeneity over microscopic distances; however, the production of single-phase Co3Ti in mixtures having a suitable composition would seem to indicate that other factors are at work in addition to simple compositional heterogeneity.
Shiga: in Processing and Properties of Nanocrystalline Materials, pp.319, eds.
Weertman: in Processing and Properties of Structural Nanomaterials, pp.69, eds.
Online since: April 2014
Authors: Ming Liang Zhu, Yan Sun
Mechanical properties of this structure were investigated through nonlinear buckling analysis by the consistent imperfect buckling analysis method, compared with the single layer LICS.
In addition, some factors are studied including prestress level, bar section, length of bar, rise-span ratio, obliquity and so on, which may influence the ultimate bearing capacity of the SLICS.
Because of the introduction of prestressed cable-strut system, the stability properties of the SLICS are similar to the beam string structure.
The stability is mainly affected by the strength of materials.
Parameter analysis In order to study stability properties of the SLICS, Structure parameters including prestress level, member section, length of bar, rise-span ratio, obliquity were analyzed.
Online since: August 2013
Authors: Ru Wang, Man Wang, Ruixiang Bai
Many scholars at home and abroad made experimental studies on the tensile properties of composite laminates [3-7].
Although tensile test method is very simple, due to their own properties and structures of the carbon fiber composite laminates, the tensile test will appear a series of problems.
What’s more important, a unified testing standard for mechanical properties of fiber reinforced polymer composites did not reach an agreement.
Therefore, above-mentioned test data could not characterize the basic tensile properties of composite laminates and the test failed.
With above-mentioned factors, the finite element model was established for analysis.
Showing 13881 to 13890 of 25943 items