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Online since: August 2013
Authors: Pornsri Pakeyangkoon, Monreudee Dejsukdipol, Manit Nithitanakul
The mechanical properties and decomposition temperatures (Td) increased with increasing filler content from 0 to 10 wt%.
A lot of effort was invested to determine the factors which affect the cellular structure and cell size of the resulting porous polymers and in 1997, Cameron and co-worker [4] have described the production of polyHIPE materials with high internal surface areas, employing methodologies similar to those used in porous polymer bead preparation.
Thermal behavior and mechanical properties of poly(DVB)polyHIPE foam filled with different amount of M-PSO (wt%).
Mechanical properties of poly(DVB)polyHIPEs, prepared from different amount of M-PSO content, were carried out.
The chemical composition, the structure of the M-PSO influenced the mechanical and thermal properties of the poly(DVB)polyHIPE foam.
Online since: March 2018
Authors: Darika Jaaoh, Roseleena Jarawae, Maimoon Intan, Huseng Chaidana
The morphology along with electrical and mechanical properties, and specifically the electrostrictive coefficient, were studied.
The increase of the permittivity is one of the key factors for increasing the capability of electrostrictive polymers.
The host matrix provides the mechanical properties, while the conductive fillers provide conductivity to the composite.
The mechanical properties of the neat NR and NR/Graphene composites.
This results showed a closely relation of the electrical and mechanical properties with the electrostriction effect.
Online since: January 2024
Authors: Jesi Tiastuti, Tri Budi Utami, Harnowo Supriadi, Zulhanif Zulhanif, Mohammad Badaruddin
However, excessive pre-deformation can lead to brittle metal, thereby reducing the mechanical and fatigue properties [5].
When material components are subjected to dynamic loading, so that the fatigue life and mechanical properties decrease.
In addition, initial cracks usually appear at the contact of the wheel with the rail, which can be two major factors in the design of the fatigue life of the material.
Lamellar structure of carbides (Fe3C) in ferrite matrix significantly determines the mechanical properties of steel.
Salimor, Experimental investigation of mechanical properties of cold-drawn AISI 1018 steel at high-temperature steady-state conditions, J.
Online since: January 2005
Authors: Jan Ji Sha, J. Yu, J.S. Park, Akira Kohyama, Tatsuya Hinoki
Acceptable performance of high temperature CMCs depends upon judicious selection and incorporation of ceramic fiber reinforcement with the proper chemical, physical and mechanical properties.
However, the mechanical properties and microstructure of reinforced fibers are very sensitive to the service environments [3-5].
Table 1 lists fibers' properties provided by the manufacturers.
The creep resistance of SiC fibers decreased with increasing the oxygen partial pressure, which is possibly controlled by the extrinsic and intrinsic factors.
For the intrinsic factors, when the fibers tested in low oxygen partial pressures, the grain growth/coarsening will occur due to coalescence of β SiC grain [11].
Online since: December 2012
Authors: Te Li Su, Shu Wen Wang
We can use these entire data to make a Response Table, then to proceed all factors effects analysis.
If some factor’s main effects value is larger, its influence to the system is larger than other factors.
In addition, as learned from main effect analysis from Table 2 spinneret temperature and gear sped are prominent factors that affect the tenacity.
Kung, Experimental analysis and optimization of the synthesizing property of nitrogen-modified TiO2 visible-light photocatalysts, J.
Su, Study on an optimal design of mechanical properties for PP/PET nonwovens, Fibres Text.
Online since: April 2014
Authors: Qing Lin Pan, Yi Lin Wang, Lei Feng, Li Li Wei
Currently, many investigations have been carried out on the microstructure, properties and processes of the Al-Zn-Mg-Cu alloy thick plates.
Mechanical tests.
The tensile properties and fracture toughness results of experimental alloy plates in L-T and T-L orientation are shown in Table 1.
Conclusions The tensile properties, fracture toughness and fatigue properties of T7451 Al-Zn-Mg-Cu alloy thick plates vary in different orientations or plate thicknesses.
The samples in L-T orientation possessed better mechanical properties, higher fracture toughness and fatigue resistance than those in T-L orientation.
Online since: October 2012
Authors: Qiang Guo, Xiao Jun Hu, Zhen Yong Zheng
Fig. 1 Tensile curves of low carbon steel There are three external factors affecting the yield stress of materials: temperature, strain rate and stress state.
Instability in the torque in coiling process will lead to inaccuracy in tracking torque, affecting constant tension control.
Owing to temperature directly affecting strip hardness, the coiling torques can be compensated according to the variable temperature [7].
It includes a gain factor and the bending torque.
Shin: Journal of Mechanical Science and Technology, Vol. 19 (2005) No.4, p.958.
Online since: September 2013
Authors: De Shen Zhao, Dong Liang Guo
This paper, taking Dalian Spring Street subway station as the background, uses the finite difference software to establish 3-D finite element analysis model to simulate the effects of tunnel excavation on underground pipeline, in which different embedment, material properties and diameters are considered.
By analyzing of the settlement and deformation law of pipeline, the least affected pipeline conditions are drawn to provide corresponding guidance for subsequent underground projects.
This series of unfavorable factors will have an adverse impact on pipeline buried into the surrounding soil, and even cause serious safety hazards on State Property, the normal life of the people [3-4].
To seize the main laws, ignoring secondary factors, the calculation process uses the following assumptions: Ÿ Consider pipelines as linear elastic constitutive, for its same diameter, wall thickness, and insignificant geometry deformation
This paper simulates the effects of a double-tube parallel tunnel excavation on underground pipeline in different embedment, material properties and diameters conditions.
Online since: September 2016
Authors: Alain Sellier, Laurie Buffo-Lacarriere, Hugo Cagnon, Stéphane Multon, Thierry Vidal
Previous studies about delayed mechanical behavior of concrete have pointed out an increase of delayed strains with the temperature rise: the basic creep can be multiplied by a factor 10 at 80°C, and coupling between creep and heating can lead to damage and to transient thermal creep.
So, the material properties just before the LOCA depend on the solicitation history since the concrete pouring.
Chemical reaction with pore pressures: Alkali reaction and delayed ettringite formation belong to this second family of chemical reaction affecting the concrete behavior.
Struct. 44 1821–35 [9] Multon S and Sellier A 2016 Cement and Concrete Research Multi-scale analysis of alkali – silica reaction ( ASR ): Impact of alkali leaching on scale effects affecting expansion tests Cem.
Eng. 1–26 [11] Schutter G De and Taerwe L 1996 Degree of hydration-based description of mechanical properties of early age concrete Mater.
Online since: December 2013
Authors: Denni Kurniawan, M.Y. Noordin, S. Sharif, P.Y.M. Wibowo Ndaruhadi
Cutting direction and the tool coating are categorical factors, while the cutting speed and feed rate are numerical factors in the input data.
Variants 1 and 2 on each categorical factors were determined based on the general conditions used, while low (-1) and high (+1) numerical factor levels on each factor is assigned to the low and high value, respectively.
Considering the low cutting parameters set and the low cutting force involved in bone machining (although not measured here), the surface properties of the cutting tools at their initial stage are of importance.
Hence, the analysis that the better surface roughness of the machined bone is likely due to the properties of the coating when compared to the results obtained from uncoated tool.
In: AKM Nurul Amin (Ed.), Titanium Alloys, Towards Achieving Enhanced Properties for Diversified Applications, InTech., Croatia (2012), p. 117-138 [7] A Muhammad, M Rahman, WY San, Ultraprecision ductile mode machining of glass by micromilling process.
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