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Online since: July 2015
Authors: Götz T. Gresser, Sathis Kumar Selvarayan, Ravand Ghomeshi, Benjamin Lehmann
One of the main aspects to be considered while optimizing the mechanical properties of CFRPs is the fiber-matrix-adhesion.
This is because the interface/interphase between fiber and matrix affects in large the properties of a composite material [3].
As discussed above, the adhesion between fiber and matrix is significant for the mechanical properties of the hybrid composite.
Fig. 5: Maximum bending stresses of composite samples The bending properties of the composite plates were also affected by the steel fiber integration.
Furthermore the amount of integrated steel fibers and the distance between fibers are major factors.
This is because the interface/interphase between fiber and matrix affects in large the properties of a composite material [3].
As discussed above, the adhesion between fiber and matrix is significant for the mechanical properties of the hybrid composite.
Fig. 5: Maximum bending stresses of composite samples The bending properties of the composite plates were also affected by the steel fiber integration.
Furthermore the amount of integrated steel fibers and the distance between fibers are major factors.
Online since: February 2011
Authors: Sheng Ling Xiao, Chen Li, Hong Lin
Analysis of the dosage of the birch fiber, starch adhesive and foaming agent and how do they affect the mechanical properties.
Material performance analysis There are many uncertain factors in the process of preparation, including the selection of raw material, dosage and processing condition.
Adding proper birch fiber can improve the properties.
Aspen fiber addition improves the mechanical properties of baked cornstarch foams.
Properties of biocomposites based on lignocellulosic fillers.
Material performance analysis There are many uncertain factors in the process of preparation, including the selection of raw material, dosage and processing condition.
Adding proper birch fiber can improve the properties.
Aspen fiber addition improves the mechanical properties of baked cornstarch foams.
Properties of biocomposites based on lignocellulosic fillers.
Online since: May 2020
Authors: Hai Jian Jiang, Xiao Chen Zhang, Mei Hui Song, Gui Ming Su, Yu Liang Ma, Ming Yue Chen, Xue Fang
In this paper, MWNTs were treated by Fendon oxidation method and mixed acid method, for finding the factors of functionalized effect affecting MWNTs.
Since the aromatic ring structure on the polyimide main chain is very stable, the polyimide has outstanding heat resistance, mechanical properties, and electrical properties [7-8].
The mechanical properties of the PI films were also the best.
Enhanced Mechanical and Electrical Properties of Polyimide Film by Graphene Sheets Via in Situ.
Dhami, Influence of Surface Modified MWCNTs on the Mechanical, Electrical and Thermal Properties of Polyimide Nanocomposites, J.
Since the aromatic ring structure on the polyimide main chain is very stable, the polyimide has outstanding heat resistance, mechanical properties, and electrical properties [7-8].
The mechanical properties of the PI films were also the best.
Enhanced Mechanical and Electrical Properties of Polyimide Film by Graphene Sheets Via in Situ.
Dhami, Influence of Surface Modified MWCNTs on the Mechanical, Electrical and Thermal Properties of Polyimide Nanocomposites, J.
Online since: January 2007
Authors: Woei Shyan Lee, Tien Yin Chan
The effects of the content of molybdenum on the dynamic properties of tungsten heavy
alloys were investigated.Increase in mechanical properties was observed in molybdenum-added
tungsten heavy alloys, due to the refined microstructure.
Among them, Mo was found to significantly promote the mechanical properties of the W-Ni-Fe alloys under quasi-static test.
The above observations are considered important factors affecting the properties of the tungsten alloys.
A quasi-static test is carried out herein to study the mechanical properties of the alloys.
The high strain rate mechanical properties of materials may be substantially different from their quasi-static properties, and the high strain rate properties should be the discriminating properties for penetrator materials.
Among them, Mo was found to significantly promote the mechanical properties of the W-Ni-Fe alloys under quasi-static test.
The above observations are considered important factors affecting the properties of the tungsten alloys.
A quasi-static test is carried out herein to study the mechanical properties of the alloys.
The high strain rate mechanical properties of materials may be substantially different from their quasi-static properties, and the high strain rate properties should be the discriminating properties for penetrator materials.
Online since: August 2013
Authors: Yin Zheng Liang, Si Chen Cheng, Yi Ping Qiu, Jian Meng Zhao
Poly(methyl methacrylate) has been one of the most widely studied in the last decades due to its outstanding and promising mechanical and chemico-physical properties[5].
Therefore, pore storage is the main factor affect the electrolyte uptake in electrospun PVDF/PMMA membrane.
Tensile properties.
The results show that mechanical properties were improved substantially by thermal treatment.
Besides, crystallinity is an essential factor of mechanical properties.
Therefore, pore storage is the main factor affect the electrolyte uptake in electrospun PVDF/PMMA membrane.
Tensile properties.
The results show that mechanical properties were improved substantially by thermal treatment.
Besides, crystallinity is an essential factor of mechanical properties.
Online since: May 2011
Authors: Nai Qi Jiao, Di Tao Niu, Yan Wang
In recent years, many researchers at home and abroad make a number of experiments and theoretical analysis on structural performance of steel fiber reinforced shotconcrete[1-6].Among them, Professor Du Guoping researches the enhancement mechanism of steel fiber reinforced shotconcrete from the viewpoint of its mechanical property [7] ; Professor Liu Xin carried out experimental study of basic mechanical properties of steel fiber reinforced shotconcrete from the viewpoint of this actual work [8]; But the research about the influence on concrete micro pore structure under different construction technology is still small.
According to the material constitutive relationship, concrete as a porous system materials, any of its properties are determined by their composition and microstructure.
Steel fiber reinforced shotconcrete (PSC) and model steel fiber reinforced concrete (MSC),that two different kinds of construction technology make much different on concrete forming and mechanical properties.In order to make the test to correspond with realistic engineering situations, all used specimens are made at the scene.After 2 days of conserve,dumoulded and sent to the laboratory for standard conserve.
of concrete[10-12], other properties of pore, such as pore size, pore size distribution, pore shape and orientation also affect the strength of concrete [13].
(3) Pore structure, pore size distribution, density and other factors which affect the durability of sprayed steel fiber concrete are less than model steel fiber reinforced concrete .
According to the material constitutive relationship, concrete as a porous system materials, any of its properties are determined by their composition and microstructure.
Steel fiber reinforced shotconcrete (PSC) and model steel fiber reinforced concrete (MSC),that two different kinds of construction technology make much different on concrete forming and mechanical properties.In order to make the test to correspond with realistic engineering situations, all used specimens are made at the scene.After 2 days of conserve,dumoulded and sent to the laboratory for standard conserve.
of concrete[10-12], other properties of pore, such as pore size, pore size distribution, pore shape and orientation also affect the strength of concrete [13].
(3) Pore structure, pore size distribution, density and other factors which affect the durability of sprayed steel fiber concrete are less than model steel fiber reinforced concrete .
Online since: March 2010
Authors: Jian Qiu Zhou, Lu Ma, Rong Tao Zhu
Strain Gradient Plasticity Theory Based on Dislocation - controlling
Mechanism for Nanocrystalline Materials
Jianqiu Zhou1,2a*
, Lu Ma2, b, Rongtao Zhu2,c
1
Department of Mechanical Engineering, Wuhan Institute of Technology, Wuhan, Hubei Province,
China, 430070
2
Department of Mechanical Engineering, Nanjing University of Technology, Nanjing, Jiangsu
Province, China, 210009
a
yyzjqcc@sohu.com, b malu41245@163.com, c rtzhu05@126.com
Keywords: nanocrystalline material, strain gradient plasticity, dislocation.
Due to their dissimilar properties and different deformation mechanisms between grain interior (GI) and grain boundary affected zone (GBAZ) in the nanocrystalline (NC) materials, a two-phase composite model consisting of GI and GBAZ was developed and adopted to build strain gradient plasticity theory.
Introduction Compared with conventional coarse-grained polycrystalline metals, nanocrystalline (NC) materials are structurally characterized by a large volume fraction of grain boundary (GB), which may significantly affect their overall physical, mechanical and chemical properties.
Therefore, the strain gradient effects near interfaces should be taken into account in analysis of the overall effective properties of NC materials.
So, the relationship of dislocation density with the increasing of γGI can be written as: (7) where M, b, dGI, and ξ are the Taylor orientation factor, Burgers's vector, size of the GI and proportionality factor, respectively; C20 and are constant, and m is inversely proportional to the temperature T.
Due to their dissimilar properties and different deformation mechanisms between grain interior (GI) and grain boundary affected zone (GBAZ) in the nanocrystalline (NC) materials, a two-phase composite model consisting of GI and GBAZ was developed and adopted to build strain gradient plasticity theory.
Introduction Compared with conventional coarse-grained polycrystalline metals, nanocrystalline (NC) materials are structurally characterized by a large volume fraction of grain boundary (GB), which may significantly affect their overall physical, mechanical and chemical properties.
Therefore, the strain gradient effects near interfaces should be taken into account in analysis of the overall effective properties of NC materials.
So, the relationship of dislocation density with the increasing of γGI can be written as: (7) where M, b, dGI, and ξ are the Taylor orientation factor, Burgers's vector, size of the GI and proportionality factor, respectively; C20 and are constant, and m is inversely proportional to the temperature T.
Online since: August 2016
Authors: Florian Pyczak, Thomas Ebel, Wolfgang Limberg, Alexandra Amherd Hidalgo
Oxygen affects the microstructure and the mechanical properties of titanium alloys.
Ti-6Al-7Nb is a promising alloy to use in PM due to its outstanding biocompatibility and mechanical properties required for load bearing medical implants.
The presence of oxygen causes high costs in the PM industry, affecting the mechanical behaviour of titanium alloys as it can significantly decrease its ductility [3,4].
There are some investigations about the microstructural factors influencing the fatigue properties.
Summary In the present work, the influence of oxygen on the mechanical properties of Ti-6Al-7Nb processed by MIM was investigated and evaluated
Ti-6Al-7Nb is a promising alloy to use in PM due to its outstanding biocompatibility and mechanical properties required for load bearing medical implants.
The presence of oxygen causes high costs in the PM industry, affecting the mechanical behaviour of titanium alloys as it can significantly decrease its ductility [3,4].
There are some investigations about the microstructural factors influencing the fatigue properties.
Summary In the present work, the influence of oxygen on the mechanical properties of Ti-6Al-7Nb processed by MIM was investigated and evaluated
Online since: July 2018
Authors: Rustam Kaibyshev, Ivan Zuiko, Vladislav Kulitckii
The effect of pre-straining prior to ageing on the precipitation behavior and its relation with mechanical properties of the AA2519 is considered.
Results and Discussion Mechanical properties.
So, pre-straining by tension and cold rolling provides increase in lattice dislocation densities by factors ~12 and ~16, respectively.
Kaibyshev, Effect of cold plastic deformation on mechanical properties of aluminum alloy 2519 after ageing, Mater.
Kaibyshev, Effect of pre-straining on the aging behavior and mechanical properties of an Al-Cu-Mg-Ag alloy, Mater.
Results and Discussion Mechanical properties.
So, pre-straining by tension and cold rolling provides increase in lattice dislocation densities by factors ~12 and ~16, respectively.
Kaibyshev, Effect of cold plastic deformation on mechanical properties of aluminum alloy 2519 after ageing, Mater.
Kaibyshev, Effect of pre-straining on the aging behavior and mechanical properties of an Al-Cu-Mg-Ag alloy, Mater.
Online since: October 2018
Authors: Xiao Min Chen, Dong Xu Li, Ying Jiang Qian, Xin Ling Hu
Platinum matrix composite is a new type of functional pottery material, which has excellent mechanical, electrical and optical properties.
For the Platinum matrix composite materials, the performance of the Pt-C compounds will be influenced by many induced factors, such as the electrical properties, mechanical properties and thermal properties, so the synthesis method of the Pt-C compounds will help other researchers a lot.
In this experiment, the hardness values are obtained at 100 ~ 500 nm scanning images, to ensure that the mechanical properties of the sample can reduce the error.
This increasing of mechanical properties may be related to the superlattice effect of the Pt-C compounds.
At the same time, the Pt-C compounds is a new type of functional pottery material with excellent performance, especially mechanical properties.
For the Platinum matrix composite materials, the performance of the Pt-C compounds will be influenced by many induced factors, such as the electrical properties, mechanical properties and thermal properties, so the synthesis method of the Pt-C compounds will help other researchers a lot.
In this experiment, the hardness values are obtained at 100 ~ 500 nm scanning images, to ensure that the mechanical properties of the sample can reduce the error.
This increasing of mechanical properties may be related to the superlattice effect of the Pt-C compounds.
At the same time, the Pt-C compounds is a new type of functional pottery material with excellent performance, especially mechanical properties.