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Online since: January 2022
Authors: Mohamad Bashree Abu Bakar, Mazlan Mohamed, Nur Athirah Zulkipli, Siti Hajar Mohd, Nurul Ainnabilah Mohd Rosdi
According to Zhou et al., the properties of the composite treated fiber using silane treatment indicate an improvement in the mechanical properties of the composites influenced by the chemical reactions between the fiber and the silane coupling agent.
The fiber loading content in composites plays a crucial factor that enhances the mechanical properties, mainly the tensile and flexural modulus.
Alagirusamy, Mechanical properties of natural fibre- reinforced composites, Textile Progress, 44(2) (2012) 85-140
Mohamed, Physical, mechanical and thermal properties of sugar palm yarn fibre loading on reinforced unsaturated polyester composites.
Alagirusamy, Mechanical properties of natural fibre- reinforced composites, Textile Progress, 44(2) (2012) 85-14.
The fiber loading content in composites plays a crucial factor that enhances the mechanical properties, mainly the tensile and flexural modulus.
Alagirusamy, Mechanical properties of natural fibre- reinforced composites, Textile Progress, 44(2) (2012) 85-140
Mohamed, Physical, mechanical and thermal properties of sugar palm yarn fibre loading on reinforced unsaturated polyester composites.
Alagirusamy, Mechanical properties of natural fibre- reinforced composites, Textile Progress, 44(2) (2012) 85-14.
Online since: June 2013
Authors: Xiang Zhao, Liang Zuo, Chang Shu He, Dong Wang, Zhen Yu Qi, Hao Wang
The microstructures and mechanical properties of welded joint were studied by scanning electron microscope and tensile test methods.
These kinds of wrought Al-Si alloy has good mechanical properties and marketing prospects, but studies on their weldability and welding procedures have only just stared.
The investigation has been performed to research the microstructure and mechanical properties of Al-12.7Si-0.7Mg alloy welded joints. 2.
Table 1 shows mechanical properties for welded joints and base materials of extruded Al-12.7Si-0.7Mg and 6063 alloys.
Fig. 4 Engineering stress-strain diagrams of specimens from welded joint and base material Fig.5 SEM fractographs of the tensile tested specimens Table 1 Mechanical properties for welded joints and base materials of extruded Al-12.7Si-0.7Mg and 6063 alloys Alloy State YS(MPa) UTS(MPa) Elongation (%) Al-12.7Si-0.7Mg T1 108 201 11.37 Al-12.7Si-0.7Mg Weld 106 189 8.96 6063 (GB/T 6892-2000) T4 65 130 12.00 6063 (ISO 15614-2-2005) Weld Joint efficiency factor 91 — 0.7 4.
These kinds of wrought Al-Si alloy has good mechanical properties and marketing prospects, but studies on their weldability and welding procedures have only just stared.
The investigation has been performed to research the microstructure and mechanical properties of Al-12.7Si-0.7Mg alloy welded joints. 2.
Table 1 shows mechanical properties for welded joints and base materials of extruded Al-12.7Si-0.7Mg and 6063 alloys.
Fig. 4 Engineering stress-strain diagrams of specimens from welded joint and base material Fig.5 SEM fractographs of the tensile tested specimens Table 1 Mechanical properties for welded joints and base materials of extruded Al-12.7Si-0.7Mg and 6063 alloys Alloy State YS(MPa) UTS(MPa) Elongation (%) Al-12.7Si-0.7Mg T1 108 201 11.37 Al-12.7Si-0.7Mg Weld 106 189 8.96 6063 (GB/T 6892-2000) T4 65 130 12.00 6063 (ISO 15614-2-2005) Weld Joint efficiency factor 91 — 0.7 4.
Online since: February 2021
Authors: Thirapat Kitinirunkul, Prakob Kitchaiya, Chesda Kiriratnikom, Paisarn Boonyarat, Suchuchchai Nuanklai
This study focused on the mechanical properties and ablation properties of liner insulation in rocket motors for improving rocket performance by means of tensile strength, elongation, ablation rate and density.
The mechanical properties were measured by using a universal testing machine (Instron 5966).
Mechanical Properties.
Ablation Properties.
Saim: Mechanical properties of HTPB-IPDI-based elastomers.
The mechanical properties were measured by using a universal testing machine (Instron 5966).
Mechanical Properties.
Ablation Properties.
Saim: Mechanical properties of HTPB-IPDI-based elastomers.
Online since: May 2011
Authors: Xiao Hong Bai, Xiao Qiang Dong, Yong Kang Lv, Peng Ju Han
The Influence of pH Value and SO42- Concentration on
Strength of Cemented Soil
Xiaoqiang Dong1,2,a, Xiaohong Bai1,b,Yongkang Lv 2,c,and Pengju Han1,d
1 College of Architecture and Civil Engineering, Taiyuan University of Technology,
Taiyuan 030024, China
2 Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province ,Taiyuan University of Technology, Taiyuan 030024, China
aE-mail: dongxiaoqiang@126.com, bE-mail: bxhong@tyut.edu.cn
cE-mail: lykang@tyut.edu.cn, dE-mail: hanpengju1013@163.com
Keywords: Cemented soil, Unconfined compressive strength, Reduction factor, pH value
Abstract: The pH value and SO42- concentration in corrosive environment may affect mechanical property of cemented soil inturn to cause some serious damage to structure.
Finally a equation is set up based on the relationship of compressive strength and factors affected, which contain the reduced coefficient of compressive strength, pH value, SO42- concentration and corrosive time.
,and Han,P.J..Experimental study on mechanical property of cemented soil under environmental contaminations [J],Chinese Journal of Geotechnical Engineering, 2007, 29(8): 1260-1263 [5] DONG Xiao-qiang, BAI Xiao-hong, ZHAO Yong-qiang.
A study of electrical property of cemented soil eroded by H2SO4 solution.
Mechanical behavior of soil cement under ambient with sulfate conditions [J], Rock and Soil Mechanics, 2008, 29 Supp (11):659-662
Finally a equation is set up based on the relationship of compressive strength and factors affected, which contain the reduced coefficient of compressive strength, pH value, SO42- concentration and corrosive time.
,and Han,P.J..Experimental study on mechanical property of cemented soil under environmental contaminations [J],Chinese Journal of Geotechnical Engineering, 2007, 29(8): 1260-1263 [5] DONG Xiao-qiang, BAI Xiao-hong, ZHAO Yong-qiang.
A study of electrical property of cemented soil eroded by H2SO4 solution.
Mechanical behavior of soil cement under ambient with sulfate conditions [J], Rock and Soil Mechanics, 2008, 29 Supp (11):659-662
Online since: August 2012
Authors: Li Gang Zhang, Hong Zhu, Xiang Dong Qi, Jian Wang
Wall-thickness and wall-face connective curvature radius are found to be the two independent factors affecting relative density.
Introduction With high specific strength, low thermal conductivity ect, cellular materials become popular to fabricate structural component and heat insulation for aviation and astronautics fields, hence their mechanical properties have been widely investigated[1-3].
The tetrakaidecahedron is an ideal model to simulate mechanical properties of cellular materials, based on this model, linear elastic properties of open-cell foams were studied and better results were obtained[4-6]; elastic properties of closed-cell cellular materials were studied and gained forecasting formula of elastic modulus[7]; influence of wall-thickness variation on elastic properties of closed-cell cellular materials was studied[8]; by finite elements method, elastic properties of cellular materials were analyzed[9].
Conclusions The solid which surface tension draws to cell-edge has influence on relative density increment, wall-face connective curvature radius is the primary factor, wall-thickness is the secondary factor, wall-thickness and wall-face connective curvature radius can be simplified as two independent factors of relative density.
Ashby: Cellular Solids: Structure and Properties (Pergamon Press, Oxford 1997)
Introduction With high specific strength, low thermal conductivity ect, cellular materials become popular to fabricate structural component and heat insulation for aviation and astronautics fields, hence their mechanical properties have been widely investigated[1-3].
The tetrakaidecahedron is an ideal model to simulate mechanical properties of cellular materials, based on this model, linear elastic properties of open-cell foams were studied and better results were obtained[4-6]; elastic properties of closed-cell cellular materials were studied and gained forecasting formula of elastic modulus[7]; influence of wall-thickness variation on elastic properties of closed-cell cellular materials was studied[8]; by finite elements method, elastic properties of cellular materials were analyzed[9].
Conclusions The solid which surface tension draws to cell-edge has influence on relative density increment, wall-face connective curvature radius is the primary factor, wall-thickness is the secondary factor, wall-thickness and wall-face connective curvature radius can be simplified as two independent factors of relative density.
Ashby: Cellular Solids: Structure and Properties (Pergamon Press, Oxford 1997)
Online since: May 2014
Authors: Yuan Tong Gu, Hai Fei Zhan, Ye Wei
This observation indicates that a higher Q-factor will be deduced for the graphene with 1.77% N-dopant comparing with that of the graphene with 0.88% N-dopant, i.e., the increase of the percentage of N-dopant is not necessary corresponding to a lower Q-factor and other factors (e.g., locations or distributions of the N-dopant) might also play a critical role in affecting the resonance properties of the graphene.
Shenoy, Mechanical properties of methyl functionalized graphene: a molecular dynamics study.
Shenoy, A molecular dynamics study of the mechanical properties of hydrogen functionalized graphene.
[23] Zhang, Y., et al., Mechanical properties of bilayer graphene sheets coupled by sp3 bonding.
[26] Mortazavi, B., et al., Nitrogen doping and vacancy effects on the mechanical properties of graphene: A molecular dynamics study.
Shenoy, Mechanical properties of methyl functionalized graphene: a molecular dynamics study.
Shenoy, A molecular dynamics study of the mechanical properties of hydrogen functionalized graphene.
[23] Zhang, Y., et al., Mechanical properties of bilayer graphene sheets coupled by sp3 bonding.
[26] Mortazavi, B., et al., Nitrogen doping and vacancy effects on the mechanical properties of graphene: A molecular dynamics study.
Online since: May 2019
Authors: Muthumari Chandrasekaran, Santosh K. Tamang, Shubhajit Das, Sutanu Samanta
Analysis of variance showed that sliding speed and load were the significant factor affecting WR and COF respectively.
As a result, it leads to severe wear damage, affecting failure of the component leading to huge economic loss.
Currently, researchers are focusing on developing hybrid metal matrix nano composites (HMMNCs) because of its improved mechanical and tribological properties.
In recent times, the tribological properties of ceramic reinforced AMMCs have been examinedby changing internal factors like reinforcement composition (single/ hybrid reinforced), percentage content of reinforcement, microstructure [3, 4] and external factors like sliding velocity, sliding distance, applied load, sliding time etc. [4].
Emamy: Microstructure and wear properties of A356-10% B4C cast composites, Mater.
As a result, it leads to severe wear damage, affecting failure of the component leading to huge economic loss.
Currently, researchers are focusing on developing hybrid metal matrix nano composites (HMMNCs) because of its improved mechanical and tribological properties.
In recent times, the tribological properties of ceramic reinforced AMMCs have been examinedby changing internal factors like reinforcement composition (single/ hybrid reinforced), percentage content of reinforcement, microstructure [3, 4] and external factors like sliding velocity, sliding distance, applied load, sliding time etc. [4].
Emamy: Microstructure and wear properties of A356-10% B4C cast composites, Mater.
Online since: May 2013
Authors: Stiliana Raynova, De Liang Zhang, Kenneth Sichone
Factors affecting the separation of Ti-Al alloy in the TiPro process
Kenneth Sichonea, Deliang Zhangb, Stiliana Raynovac
Waikato Centre for Advanced Materials, School of Engineering, The University of Waikato, Private Bag 3105, Hamilton 3240.
Introduction Despite its high abundance in the earth’s crust and the inherent favorable properties, titanium continues to be under-utilized and the global production is low due to the high cost associated with the extraction from its ores and subsequent fabrication into products.
The input powders are only mechanically activated into an extremely reactive composite powder by high energy mechanical milling (HEMM).
Conclusion The temperature of the combustion synthesis products attained and the extrusion pressure applied are the major primary factors influencing solid/liquid separation and the yield of Ti-Al alloys produced by the TiPro process.
The combustion temperature is determined by interdependent factors such as the rate of heating the reactants, milling time and the thermal mass.
Introduction Despite its high abundance in the earth’s crust and the inherent favorable properties, titanium continues to be under-utilized and the global production is low due to the high cost associated with the extraction from its ores and subsequent fabrication into products.
The input powders are only mechanically activated into an extremely reactive composite powder by high energy mechanical milling (HEMM).
Conclusion The temperature of the combustion synthesis products attained and the extrusion pressure applied are the major primary factors influencing solid/liquid separation and the yield of Ti-Al alloys produced by the TiPro process.
The combustion temperature is determined by interdependent factors such as the rate of heating the reactants, milling time and the thermal mass.
Online since: December 2010
Authors: Jian Lin Li, Jing Guo, Rui Hong Wang, Yu Zhou Jiang, Li Dang
The rock masses containing joints have completely different mechanical properties with the intact ones.
The rock mass containing joints has completely different mechanical properties with the intact one [1-7].
The results show that the mechanical properties of jointed rock mass are significantly affected by the direction, length, filling material, degree of closure, connectivity rate and etc. of containing joints.
Although there has been some research on the mechanical properties of rock mass containing throughout joint cracks, as to the rock mass containing intermittent joints, for the complexity of its mechanics properties, it's still necessary to make a further exploration on its mechanical mechanism.
Prefabricated joint is the main factor that affects the failure pattern of rock mass.
The rock mass containing joints has completely different mechanical properties with the intact one [1-7].
The results show that the mechanical properties of jointed rock mass are significantly affected by the direction, length, filling material, degree of closure, connectivity rate and etc. of containing joints.
Although there has been some research on the mechanical properties of rock mass containing throughout joint cracks, as to the rock mass containing intermittent joints, for the complexity of its mechanics properties, it's still necessary to make a further exploration on its mechanical mechanism.
Prefabricated joint is the main factor that affects the failure pattern of rock mass.
Online since: September 2007
Authors: R. Aleksić, I. Balać, V.J. Radojević, P. S. Uskoković, D. Stojanović
Effect of Silane Coupling Agents on Mechanical Properties of Nano-SiO2
Filled High-Density Polyethylene Composites
D.
The influence of the particle treatment on the mechanical properties of composites was determined by compression and indentation tests.
Introduction Incorporation of inorganic particulate filler is an attractive way to improve various mechanical, thermal and chemical properties of polymers.
The extent to which these properties are affected is influenced by many factors, including the geometry and size of the filler as well as the degree of agglomerate dispersion into the polymeric matrix.
The trend in mechanical properties observed is such that the properties increase: untreated SiO2→GLYMO1→MEMO2→MEMO1, clearly indicating that the nature of dispersion and aggregation of particles can affect the properties of composites significantly.
The influence of the particle treatment on the mechanical properties of composites was determined by compression and indentation tests.
Introduction Incorporation of inorganic particulate filler is an attractive way to improve various mechanical, thermal and chemical properties of polymers.
The extent to which these properties are affected is influenced by many factors, including the geometry and size of the filler as well as the degree of agglomerate dispersion into the polymeric matrix.
The trend in mechanical properties observed is such that the properties increase: untreated SiO2→GLYMO1→MEMO2→MEMO1, clearly indicating that the nature of dispersion and aggregation of particles can affect the properties of composites significantly.