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Online since: March 2012
Authors: Li Song, Yuan Yuan, Feng Tao Wei, Kun Shi
The characteristics of interface affect the behaviors of a whole structure considerably.
The characteristics of interface affect the behaviors of a whole structure considerably.
There are many complicated factors influencing the characteristic of the interface.
These principal influential factors include the materials, appearance of contact surfaces, the size of the pre-tightening force, the media between two mating surfaces, the size and geometry shape of interfaces and the characteristics of the dynamic forces of interfaces[1].
Part Ⅲ is the interface region, whose property parameter andcould be available from experimental data and formula (6) and (7).
Online since: August 2013
Authors: Yao Dong Gao, You Zheng Ma, Xiang Gang Kong
The front supporter is an important loaded part of the concrete mixer truck and its strength properties directly affect the loading capacity of the truck [2].
In terms of the concrete mixer truck, these simplified load cases need to be considered: in terms of power performance, the highest speed on the straight road; in terms of braking performance, ultimate braking; in terms of handling stability, turning on the level road; in terms of ride comfort, driving on the uneven road; in terms of torsional properties of the chassis, the torsion of the main frame.
On the basis of related design specifications, the safety factor should exceed 1.2.
Therefore, comprehensively considering various factors, the intermediate horizontal steel plate remains unchanged.
The safety factor is increased to 1.3.
Online since: November 2013
Authors: Bing Yuan, Yun Xia Liu, Jun Liang Yang
Introduction Sapphire is an alumina single crystal, also called corundum; it has excellent mechanical and physical properties, such as high hardness, high tensile strength, erosion resistance, thermal conductivity, mechanical stability and remarkable thermal impact properties.
During operation, you should avoid all possible interference factors; the tiny mechanical vibrations of equipment will greatly affect the quality of crystal.
A typical analysis process includes the following several steps: 1.creating/importing geometry model, 2.defining unit and material properties attribute, 3.meshing, 4.applying load, 5.solving and the processing with results[2].
The finite element model of key parts Static analysis of key parts The static stiffness of crystal furnace is determined by material, shape, size and many other factors, it is a very important indicator to measure the overall performance of equipment [5].
Journal of Mechanical Strength,2007,29(5):795-799
Online since: October 2011
Authors: Xiao Hong Zheng, Pei Yan Huang, Chuan Yu Zhao, Hao Zhou
The calculation values of SIF of the surface crack by FEM had the same properties when the shape and relative depth changed.
The conclusions were as follows: (1) Front side strengthening reduced the stress intensity factors of 3D semi-elliptical surface crack significantly, but the increasing amplitude of strengthening effects decreased gradually with increasing of thickness of CFL
(2) Back side strengthening also reduced the stress intensity factors, but it was not obvious as the front side strengthening.
Transactions of the Canadian Society for Mechanical Engineering, 33(2009) 399-409
Some Key Mechanical Problems on FRP Sheet Applied in Civil Engineering.
Online since: November 2016
Authors: Han Lin Liao, Sophie Costil, Robin Kromer, Sébastien Gojon, Emilie Aubignat, Christophe Verdy, Cécile Langlade
Laser-matter interaction is commonly described regarding three main factors: laser beam, materials and environment.
New materials with specific properties such as endurance life and/or lower environmental impact attract emerging technologies such as thermal spraying.
However, adhesive bond strengths have to be high enough to play a key role in surface properties.
Figure 3 represents the adherence values for all material combinations function of surface ratio factors (R).
Coddet, Pre-/ During-/ Post-Laser Processes to Enhance the Adhesion and Mechanical Properties of Thermal Sprayed Coatings with a Reduced Environmental Impact, J.
Online since: May 2020
Authors: Wei Yu, Huan Yang, Wen Gao Chang, Zeng Qiang Man, Yun Fei Cao
The experimental results show that M-A island is one of the important factors controlling the toughness of high strength steel in bainite structure.
However, bainite ferrite itself is also a very critical factor for the overall mechanical properties of steel [4].
When the final cooling temperature changes, the bainite structure changes, and the morphology and volume fraction of M-A island also change, which affects the mechanical properties of steel [6-9].
Its comprehensive mechanical properties are best at three different final cooling temperatures.
Liu, Microstructure and mechanical properties of a low carbon bainitic steel, J.
Online since: June 2014
Authors: Gang Xu, Zhi Guo Liu
The paper puts forward calculation method and influencing factors of coal wall stability ratio.
According to the pressure date comparison of Tiebei mine two coal faces, setting load is one of important factors inducing roof large area weighting.
The setting load value can affect the working face roof safety directly.
Figure .5 The analysis of shear failure of coal wall (1.7) where C=coal cohesion; =coal friction angle; S=shear stress; h=height of shear failure; q=concentrated load; α=angle between shear plane and coal wall; P=roof pressure; W=sip rock gravity; In Eq.1.7, ;;;,put theses equations into Eq.1.7: (1.8) According to Eq.1.8, coal wall stability coefficient is concerned with coal mechanical properties and concentrated load.
(4) The obeservation showes that low setting load is one of the important factors which cause working face roof cuting in large area.
Online since: December 2010
Authors: Yun Bo Zhang, You Qing Jiang
The mechanical breakdown of polymer may be related to a number of factors, such as polymer structure, molecular weight of polymer, mechanical force and temperature.
Hardness may have a significant effect upon other phsical properties.
Its aged state depends on the polymer internal factors, such as the chemical composition, molecular structure, physical state ; and the external factors such as light, heat, electricity, mechanical stress, oxygen, ozone and chemical media.
Some factors other than chemical factors such as oxygen in the air that reacts with the polymer, and caused the breakdown, crosslink and other reactions.
The blend was appropriate so that it presented good properties.
Online since: December 2014
Authors: Diogo Pedro, Jorge de Brito, Luís Evangelista
According to Tam et al. [14], the presence of pores and cracks in the mortar next to the interfacial transition zone (ITZ) causes a weak link in the microstructure of concrete, affecting the global strength.
Results and discussion This section presents and comments the results of the hardened concrete properties (mechanical and durability characteristics).
Figure 3 - 28-day modulus of elasticity These results show that this property is influenced by the cement paste, aggregate type, the bond and distribution of the concrete constituents, i.e. the factors that affect the overall deformability of the composite.
Rahal, Mechanical properties of concrete with recycled coarse aggregate, Build Environ. 42 (2007), 407–15
Kliszczewicz, Influence of recycled aggregates on mechanical properties of HS/HPC, Cem.
Online since: June 2015
Authors: Mohamad Rusop, Najwa Ezira Ahmed Azhar, Aimi Bazilah Rosli, A.K.S. Shafura, Shafinaz Shariffudin
There are various factors that can affect to electrical, structural and optical properties of ZnO thin films such as deposition temperature, time deposition and gas flow rate.
In this paper, the effect of gas flow rate ZnO nanotetrapods on structural and optical properties were explored.
Wang, “Zinc oxide nanostructures: growth, properties and applications,” J.
Lu, “Zinc oxide nanostructures: synthesis and properties.,” J.
Jacob, “Growth and luminescence properties of large-scale zinc oxide nanotetrapods,” Cryst.
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