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Online since: July 2007
Authors: Gerhard Hirt, H. Justinger
Introduction
As can be found in the literature, the miniaturization of forming processes is affected by several
different factors [1].
These factors were considered as two of the main influencing factors, because - the ratio dK / s0 affects the strength of the material.
These two maxima are affected in different ways by the influencing factors in the experiments, so that the combined process of deep drawing and ironing is very helpful for the identification of relevant factors.
Fujita: Effect of Specimen Thickness on mechanical Properties of polycrystalline Aggregates with various Grain Sizes, Acta Metallurgica, Vol. 27, pp. 855-862, 1978 [6] S.
Fujita: Effects of Grain Size and Specimen Thickness on Mechanical Properties of Polycrystalline Copper and Copper-Aluminum Alloy, Trans.
These factors were considered as two of the main influencing factors, because - the ratio dK / s0 affects the strength of the material.
These two maxima are affected in different ways by the influencing factors in the experiments, so that the combined process of deep drawing and ironing is very helpful for the identification of relevant factors.
Fujita: Effect of Specimen Thickness on mechanical Properties of polycrystalline Aggregates with various Grain Sizes, Acta Metallurgica, Vol. 27, pp. 855-862, 1978 [6] S.
Fujita: Effects of Grain Size and Specimen Thickness on Mechanical Properties of Polycrystalline Copper and Copper-Aluminum Alloy, Trans.
Online since: May 2013
Authors: A.P. Kravchuk, V.D. Danchuk
It is shown that one of the factors that determine the appropriate rheological properties of bitumen is the existence in certain temperature ranges rotational phase of hydrocarbon components.
Therefore, at the first stage it is advisable to study in depth the properties of relatively simple model hydrocarbon components.
This will detect the influence of the main features of the processes that occur in these materials on their rheological properties.
This leads to dramatic (nonlinear) changes in structural and mechanical properties of hydrocarbon components of bitumen, namely, sharp on some orders, reducing their viscosity even at temperatures below the melting point.
Thus, there is reason to believe that one of the factors that determine the appropriate rheological properties of bitumen is the existence in certain temperature ranges rotational phase of hydrocarbon components.
Therefore, at the first stage it is advisable to study in depth the properties of relatively simple model hydrocarbon components.
This will detect the influence of the main features of the processes that occur in these materials on their rheological properties.
This leads to dramatic (nonlinear) changes in structural and mechanical properties of hydrocarbon components of bitumen, namely, sharp on some orders, reducing their viscosity even at temperatures below the melting point.
Thus, there is reason to believe that one of the factors that determine the appropriate rheological properties of bitumen is the existence in certain temperature ranges rotational phase of hydrocarbon components.
Online since: May 2014
Authors: Wassanai Wattanutchariya, Pornpatima Yenbut
Nonetheless, such materials have limitations regarding their mechanical, biodegradability, and other properties [9].
However, phosphate glass has weak mechanical properties.
Therefore, HA was added to enhance the scaffold’s mechanical properties.
Consequently, sintering temperature may have an effect on mechanical properties.
Future research could emphasize the improvement of related scaffold characteristics such as mechanical and biological properties.
However, phosphate glass has weak mechanical properties.
Therefore, HA was added to enhance the scaffold’s mechanical properties.
Consequently, sintering temperature may have an effect on mechanical properties.
Future research could emphasize the improvement of related scaffold characteristics such as mechanical and biological properties.
Online since: January 2005
Authors: Hak Cheol Lee, Jin Won Choi, Jin Keun Oh, Nack Kim
Besides such defects, investment cast
alloy welds have microstructural features much different from those of conventionally processed
titanium alloys, which may have adverse effects on mechanical properties.
In the present study, the effects of load ratio and environment on the fatigue properties of investment cast Ti-6Al-4V alloy welds are investigated.
Effects of welded microstructures on fatigue properties were analyzed, and microstructural factors occurring at and phases and at interfaces between them were examined by observing the fatigue crack propagation behavior and fractured surfaces.
Fatigue Properties.
This finding indicates that the fatigue crack propagation behavior of Ti-6Al-4V alloy was strongly controlled by intrinsic factors such as microstructure rather than by extrinsic factors such as crack closure.
In the present study, the effects of load ratio and environment on the fatigue properties of investment cast Ti-6Al-4V alloy welds are investigated.
Effects of welded microstructures on fatigue properties were analyzed, and microstructural factors occurring at and phases and at interfaces between them were examined by observing the fatigue crack propagation behavior and fractured surfaces.
Fatigue Properties.
This finding indicates that the fatigue crack propagation behavior of Ti-6Al-4V alloy was strongly controlled by intrinsic factors such as microstructure rather than by extrinsic factors such as crack closure.
Online since: December 2013
Authors: Teng Li, Zhong Qiu Wang, Hong Ru Wang, Su Yu Wang
By summarizing of Tonpilz and Janus-type transducer influence factors,such as transducer structure type, geometry parameters, the rule of redressing the mechanical quality factor Qm is investigated, and the trend of extending the frequency band by multi-mode coupling is got.
Piezoelectric ceramic sheet thickness and the number play a major role in the operating frequency of the transducer, the mechanical quality factor and electrical impedance properties.
The character of Janus transducer is that, compact structure, simple design, can be used for middle or high-power acoustic signal transmitting, easily usage for array, good physical properties, manufacturing technology is more mature, and its own symmetrical structure of the transducer can effectively reduce the mechanical quality factor Qm value when it subject to the same fluid resistance.
Their common purpose is to decrease the mechanical quality factor Qm value, thereby increase bandwidth.
It is shown that the cavity radius and height is a most important influential factor that can affect transmitting voltage response.
Piezoelectric ceramic sheet thickness and the number play a major role in the operating frequency of the transducer, the mechanical quality factor and electrical impedance properties.
The character of Janus transducer is that, compact structure, simple design, can be used for middle or high-power acoustic signal transmitting, easily usage for array, good physical properties, manufacturing technology is more mature, and its own symmetrical structure of the transducer can effectively reduce the mechanical quality factor Qm value when it subject to the same fluid resistance.
Their common purpose is to decrease the mechanical quality factor Qm value, thereby increase bandwidth.
It is shown that the cavity radius and height is a most important influential factor that can affect transmitting voltage response.
Online since: October 2013
Authors: Bo Lin He, Jing Liu, Ying Xia Yu, Jian Ping Shi
The fatigue property will affect the life span of the bogie and the travelling crane safety of the vehicles [2~3].
Among the influence factors, residual stress is one of the factors that affect the joint fatigue life [6-7].
The test material is 16MnR, the chemical composition and mechanical properties was shown in Table 1 and Table 2.
Among the three influence factors, the residual stress contributed to fatigue life may be around 16%.
References [1] Lixing Huo: Fracture Properties of Welded Structure and Evaluation.
Among the influence factors, residual stress is one of the factors that affect the joint fatigue life [6-7].
The test material is 16MnR, the chemical composition and mechanical properties was shown in Table 1 and Table 2.
Among the three influence factors, the residual stress contributed to fatigue life may be around 16%.
References [1] Lixing Huo: Fracture Properties of Welded Structure and Evaluation.
Online since: April 2012
Authors: Yu Bai, Yan Cao, Xiao Fen Zhang
The result is the parameters that take into account all the existing restrictive factors.
Therefore, when the cutting parameters are determined, it needs to consider all factors.
The factors that affect the cutting parameter selection constitute input parameters.
Finally, in terms of different types of machine tools, the factors that affect the cutting parameter selection are different, different selection processes are established for different machine tools.
Title Bar Table Area Property Area Parameter Area Scale Factor Results Area Button Area Figure 1.
Therefore, when the cutting parameters are determined, it needs to consider all factors.
The factors that affect the cutting parameter selection constitute input parameters.
Finally, in terms of different types of machine tools, the factors that affect the cutting parameter selection are different, different selection processes are established for different machine tools.
Title Bar Table Area Property Area Parameter Area Scale Factor Results Area Button Area Figure 1.
Online since: January 2013
Authors: Min Yuan Huang, Zong Ren Zou
The in-depth study of external prestressing curved beam’s mechanical properties and construction techniques will effectively grip external prestressing curved beam’s mechanical properties and deformation laws.
In external prestressing curved beam’s corresponding mechanical properties analysis, the corresponding reasonable value of the structure key parameters is the realization of external prestressing curved beam optimization design of key factors, which is mainly concentrated in the following areas.
And the axial force data is also the monitoring factors of the strengthening construction.
Therefore, the mechanical properties of external prestressing curved beam and reasonable adjustments will be the effective means of structure stress and have significant economic benefit.
Too large or too small diameter will affect the mechanical performance of external prestressing curved beam.
In external prestressing curved beam’s corresponding mechanical properties analysis, the corresponding reasonable value of the structure key parameters is the realization of external prestressing curved beam optimization design of key factors, which is mainly concentrated in the following areas.
And the axial force data is also the monitoring factors of the strengthening construction.
Therefore, the mechanical properties of external prestressing curved beam and reasonable adjustments will be the effective means of structure stress and have significant economic benefit.
Too large or too small diameter will affect the mechanical performance of external prestressing curved beam.
Online since: July 2015
Authors: Jaafar Sahari, Hendra Suherman, Irmayani Irmayani
Composite that has electrical conductivity property known as conductive polymer composites (CPCs).
The electrical conductivity of the composite bipolar plate obtained was less than 6 S/cm, although the bipolar plate had excellent mechanical and gas barrier properties.
Although the moulding parameters are the important factors on the resulting high electrical conductivity of the CB/G/EP composite, the optimization of the moulding parameters has been given less attention in the literature, especially in fabrication CB/G/EP composite.
The moulding parameters such us moulding temperature (A), moulding pressure (B), and moulding time (C) were selected as control factors.
ANOVA results show that the most significant factor in affecting the electrical conductivity of the CB/G/EP composite was moulding time (C) with percentage contribution of 59.98%. 4.
The electrical conductivity of the composite bipolar plate obtained was less than 6 S/cm, although the bipolar plate had excellent mechanical and gas barrier properties.
Although the moulding parameters are the important factors on the resulting high electrical conductivity of the CB/G/EP composite, the optimization of the moulding parameters has been given less attention in the literature, especially in fabrication CB/G/EP composite.
The moulding parameters such us moulding temperature (A), moulding pressure (B), and moulding time (C) were selected as control factors.
ANOVA results show that the most significant factor in affecting the electrical conductivity of the CB/G/EP composite was moulding time (C) with percentage contribution of 59.98%. 4.
The Impact of Plant Hedgerow in Three Gorges on the Soil Chemicophysical Properties and Soil Erosion
Online since: January 2012
Authors: Wen Xing Lü, Hong Jiang Zhang, Yu He Wu, Jin Hua Cheng, Jian Qiang Li, Xing Wang
The formula of anti-corrosion index S is shown as follows:
Fig 1 Effects on soil physical caused by plant hedgerows
Results and Analysis
The impact of hedgerow on soil physical properties
Soil density, porosity and mechanical component are important indices of soil physical properties, reflecting the soil's water, air, texture and structure of integrated physical properties, which have reflected water, gas, texture, structure and other complex physical characteristics.
In the sampling field of plant hedgerow, due to the inserting of root as well as retaining at the base of plant hedgerow and soil reinforcement, combined with the factors such as leaves’ decay and decomposition, the physical properties of sloped farmland soil are obviously improved.
The impact of plant hedgerow of soil chemical properties Plant hedgerows can slow the decline speed of chemical properties’ index content to play a role in fertilizer conservation.
In corn fields without plant hedgerow, the index contents of chemical properties are lower.
This is also because the plant hedgerow affects the distribution of clay.
In the sampling field of plant hedgerow, due to the inserting of root as well as retaining at the base of plant hedgerow and soil reinforcement, combined with the factors such as leaves’ decay and decomposition, the physical properties of sloped farmland soil are obviously improved.
The impact of plant hedgerow of soil chemical properties Plant hedgerows can slow the decline speed of chemical properties’ index content to play a role in fertilizer conservation.
In corn fields without plant hedgerow, the index contents of chemical properties are lower.
This is also because the plant hedgerow affects the distribution of clay.