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Online since: July 2013
Authors: Yu Mei Ding, Jian Yun He, Zi Chen Xue, Wei Min Yang
In recent years, people pay more attention to study the relationship between the structure and properties of SGF-TPU composites.
The structure of SGF-TPU composites for example, fiber orientation, distribution and fiber length, has great effect on the properties of SGF-TPU composites [5].
So it is meaningful to further study the properties of SGF-TPU composites academically and experimentally.
The tensile properties were obtained from INSTRON 1185.
Kutty, Mechanical Properties of Short Polyethylene Terephthalate Fiber Thermoplastic Polyurethane Composite, Int.
The structure of SGF-TPU composites for example, fiber orientation, distribution and fiber length, has great effect on the properties of SGF-TPU composites [5].
So it is meaningful to further study the properties of SGF-TPU composites academically and experimentally.
The tensile properties were obtained from INSTRON 1185.
Kutty, Mechanical Properties of Short Polyethylene Terephthalate Fiber Thermoplastic Polyurethane Composite, Int.
Online since: April 2014
Authors: Yao Hong Huang, Yong Chang Guo
Introduction
Fiber reinforced polymer has many advantage , such as lightweight , high strength , corrosion resistance , etc , and gradually widely used in civil engineering .Domestic and foreign study and practice results show that externally bonded FRP reinforced concrete structures with good mechanical properties .
A large number of experimental studies have shown that the durability of CFRP is good, environment has little effect on its mechanical properties .
Then after 1 year , it has declined dramatically The durability of saturating resin which is one of components of fiber reinforced polymer and adhesive material of FRP and concrete, affects the property of FRP reinforced structure.
The results showed that the influence on the durability of the resin caused by combination of each factor of outdoor exposure was more serious than that caused by single accelerated factor.
However, few of the existing works focuses on the mechanical properties of FRP reinforced concrete structure under corrosive environment.
A large number of experimental studies have shown that the durability of CFRP is good, environment has little effect on its mechanical properties .
Then after 1 year , it has declined dramatically The durability of saturating resin which is one of components of fiber reinforced polymer and adhesive material of FRP and concrete, affects the property of FRP reinforced structure.
The results showed that the influence on the durability of the resin caused by combination of each factor of outdoor exposure was more serious than that caused by single accelerated factor.
However, few of the existing works focuses on the mechanical properties of FRP reinforced concrete structure under corrosive environment.
Online since: March 2013
Authors: Zhao Ning Zhang, Ke Xing Li
Due to the environment, climate, loads and other factors, the pre-stress applied to the beam is not a constant.
Introduction Being economical, applicable and good mechanical properties, the pre-stressed concrete box girder is widely used on highway and city bridges.
Therefore, scholars in China and other countries have made a thorough study of the main causes of bridge defects and found that the pre-stress loss is one of the main factors affecting the strength and stiffness of the pre-stressed concrete bridge in service.
In order to simplify the problem, the pre-stress loss of the beam at different location is regarded as a constant which comprehensively reflects the influence of the internal and external factors involved in pre-stress.
Due to the measured deflection of bridge under different time, temperature and other factors, the value is looked upon as a comprehensive value that is correspond with the particular period of time and particular condition.
Introduction Being economical, applicable and good mechanical properties, the pre-stressed concrete box girder is widely used on highway and city bridges.
Therefore, scholars in China and other countries have made a thorough study of the main causes of bridge defects and found that the pre-stress loss is one of the main factors affecting the strength and stiffness of the pre-stressed concrete bridge in service.
In order to simplify the problem, the pre-stress loss of the beam at different location is regarded as a constant which comprehensively reflects the influence of the internal and external factors involved in pre-stress.
Due to the measured deflection of bridge under different time, temperature and other factors, the value is looked upon as a comprehensive value that is correspond with the particular period of time and particular condition.
Online since: October 2010
Authors: Xiao Yu Zhao, Yan Feng Xing, Yan Song Wang
The
stiffness matrices of sheet metal components are usually not variational during the process of
tolerance analysis; however, material properties of the compliant parts may change in volume
production.
However, material properties of the compliant parts may change in volume production.
The average ( M ) of all level results for the factors is used to calculate the range R of every factor that can judge the importance of the factors.
The above work is only qualitative analysis for the factors.
Ceglarek: Journal of Mechanical Design, Vol. 125 (2003), p.673 [4] J.A.
However, material properties of the compliant parts may change in volume production.
The average ( M ) of all level results for the factors is used to calculate the range R of every factor that can judge the importance of the factors.
The above work is only qualitative analysis for the factors.
Ceglarek: Journal of Mechanical Design, Vol. 125 (2003), p.673 [4] J.A.
Online since: October 2010
Authors: Kong Yin Zhao, Jing Feng, Guo Yang Shi, Huan Zhang, Jun Fu Wei, Xiao Lei Wang
UV-induced grafting is a useful technique for the surface modification of polymers attributing to its low cost of operation without affecting the buck polymer [9].
Polysulfone was selected as the membrane due to its thermal, mechanical and chemical stability.
To examine the electrical property of the membrane, its streaming potential was measured.
There are many factors affecting the interaction between membrane surface and protein, such as surface charge, surface free energy and topological structure, solution environment and protein properties.
However, more work has to be done in order to achieve better properties for a desired permeability and retention.
Polysulfone was selected as the membrane due to its thermal, mechanical and chemical stability.
To examine the electrical property of the membrane, its streaming potential was measured.
There are many factors affecting the interaction between membrane surface and protein, such as surface charge, surface free energy and topological structure, solution environment and protein properties.
However, more work has to be done in order to achieve better properties for a desired permeability and retention.
Online since: June 2012
Authors: Xiao Hu Zheng, Ming Chen, Da Peng Dong, Ying Ying Wei, De Dong Yu
As the bones used in this study were taken from different bodies, the cutting force values are closely dependent on the mechanical properties of bones.
As the bone density is one factor affecting the drilling force most, so in the next stage, we will measure the bone density so as to do more analysis on the drilling force.
(3) For the great differences of mechanical properties among the bones, cutting forces of each bone were also different from each other.
In order to discover the influence factors to the cutting forces, other factors related to the mechanical properties should be concerned such as bone density.
Krause: Mechanical effects of orthogonal bone cutting, Ph.D.
As the bone density is one factor affecting the drilling force most, so in the next stage, we will measure the bone density so as to do more analysis on the drilling force.
(3) For the great differences of mechanical properties among the bones, cutting forces of each bone were also different from each other.
In order to discover the influence factors to the cutting forces, other factors related to the mechanical properties should be concerned such as bone density.
Krause: Mechanical effects of orthogonal bone cutting, Ph.D.
Online since: May 2006
Authors: Xing Dong Zhang, Y.M. Jiang, L. Zheng, J.M. Luo, T. Yuan
Material and
surface properties are known to have great impact on tissue-implant integration.
Materials and Methods Material, surface property, hole size and healing period during the two surgical stages, are factors that influence the biological activity of PD.
For the former, the integration of tissue and implant relies mostly on bioadhesive factors, which resulted in weak connections [4].
Material and the surface properties greatly influenced the integration of the tissue and implant.
It is the biological property of a material that affected the ingrowth of tissue through holes.
Materials and Methods Material, surface property, hole size and healing period during the two surgical stages, are factors that influence the biological activity of PD.
For the former, the integration of tissue and implant relies mostly on bioadhesive factors, which resulted in weak connections [4].
Material and the surface properties greatly influenced the integration of the tissue and implant.
It is the biological property of a material that affected the ingrowth of tissue through holes.
Online since: May 2012
Authors: Chuan Guo Cai
Based on these data, an analysis on various factors that affect the ductility of concrete filled steel tubular columns is conducted.
Based on the experimental data, the energy dissipation characteristics and the cumulative damage of the structure are compared with that of the numerical analysis by finite element method, to analyze the main factor affecting the plastic hinge formation.
Considering the above three factors, 7 specimens are tested based on the orthogonal method.
Fig. 4 Skeleton curves of the specimens with different influence factors.
In [8], the longitudinal tangential direction is compared with the horizontal cutting direction, and it is concluded that the basic mechanical properties in the horizontal cutting and vertical cutting are essentially similar.
Based on the experimental data, the energy dissipation characteristics and the cumulative damage of the structure are compared with that of the numerical analysis by finite element method, to analyze the main factor affecting the plastic hinge formation.
Considering the above three factors, 7 specimens are tested based on the orthogonal method.
Fig. 4 Skeleton curves of the specimens with different influence factors.
In [8], the longitudinal tangential direction is compared with the horizontal cutting direction, and it is concluded that the basic mechanical properties in the horizontal cutting and vertical cutting are essentially similar.
Online since: March 2010
Authors: Yu Jie Fan, Shu Huang, Jian Zhong Zhou, Min Wang, Yin Bo Zhu, Ling Ling Hu, Jian Fei Zhao
In this paper, the basic principle of µLSP and mechanism of wave-solid coupling were
introduced, the influence factors on strengthening effects, such as micro-size effect, anisotropy,
dislocation, stacking fault, grain boundary and surface energy were discussed from the microscopic
point of view, the results provide theoretical guidance for further study.
Distribution of dislocations in metal surface will have a direct influence on the mechanical, physical metallurgy and electrochemical properties of the material [15].
Stacking fault energy is a physical nature of metal materials, the value of stacking fault energy is closely related to motion mode of dislocation during the deformation of materials, and directly affects the mechanical properties of materials.
Summary LSPµ is an effective surface treatment method for improvement of physical and mechanical properties of micro-device structure.
Murr.: "Microstructure-Mechanical Property Relations," Shockwave and High-Strain-Rate Phenomena in Metals (Plenum Press, America 1981)
Distribution of dislocations in metal surface will have a direct influence on the mechanical, physical metallurgy and electrochemical properties of the material [15].
Stacking fault energy is a physical nature of metal materials, the value of stacking fault energy is closely related to motion mode of dislocation during the deformation of materials, and directly affects the mechanical properties of materials.
Summary LSPµ is an effective surface treatment method for improvement of physical and mechanical properties of micro-device structure.
Murr.: "Microstructure-Mechanical Property Relations," Shockwave and High-Strain-Rate Phenomena in Metals (Plenum Press, America 1981)
Online since: March 2006
Authors: In Shung Lee, Meng Kao Yeh
Since the electronic packages are made of many kinds of materials which may have
different properties at different temperature [6].
Many researchers [7-9] investigated the interfacial properties between different materials; they provided the useful equations and experiemntal data.
Lee and Lee [10] studied the mechanical properties of EMC which provided the fracture strength of EMC.
The stress intensity factors at interface and in the package were calculated first, then the strain energy release rates were obtained and used to evaluate the delamination growth.
In analysis, the stress intensity factors for mode I and mode II at the crack tip were found by extrapolating the data obtained at several points away from the crack tip and by making r approach zero.
Many researchers [7-9] investigated the interfacial properties between different materials; they provided the useful equations and experiemntal data.
Lee and Lee [10] studied the mechanical properties of EMC which provided the fracture strength of EMC.
The stress intensity factors at interface and in the package were calculated first, then the strain energy release rates were obtained and used to evaluate the delamination growth.
In analysis, the stress intensity factors for mode I and mode II at the crack tip were found by extrapolating the data obtained at several points away from the crack tip and by making r approach zero.