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Online since: April 2014
Authors: Dong Zhou, Chen Hui Liu, Bao Guo, Guan Yong Yue
The cementation get reinforced and the change of the content of closed air caused by the temperature curing may be the key factors.
Although the influence of temperature on engineering property of unsaturated soil is a very complicated process, a further research is still needed on the basic mechanical property.
Thus the cementation get reinforced. 4) The closed air in soil, which increases the elasticity and decreases the permeability of the soil, has important influence on the mechanical properties of cohesive soil.
However, it does indicates such a fact: On the researches of soil mass structure, the influence of the change of soil structure strength, which is caused by temperature, on the mechanical properties should be taken into consideration.
Mitchell, “Temperature effects on the engineering properties and behaviour of soils,” Highway Research Board, Special Report 103(1969) 9
Although the influence of temperature on engineering property of unsaturated soil is a very complicated process, a further research is still needed on the basic mechanical property.
Thus the cementation get reinforced. 4) The closed air in soil, which increases the elasticity and decreases the permeability of the soil, has important influence on the mechanical properties of cohesive soil.
However, it does indicates such a fact: On the researches of soil mass structure, the influence of the change of soil structure strength, which is caused by temperature, on the mechanical properties should be taken into consideration.
Mitchell, “Temperature effects on the engineering properties and behaviour of soils,” Highway Research Board, Special Report 103(1969) 9
Online since: February 2016
Authors: Paweł Kwaśniewski, Tadeusz Knych, Andrzej Mamala, Justyna Grzebinoga, Eliza Sieja-Smaga, Radosław Kowal, Grzegorz Kiesiewicz, Bartosz Jurkiewicz, Artur Kawecki, Wojciech Ściężor
By the suitable selection of the conductor’s material we have an influence for this factors.
It should be emphasized that these changes in the electrical properties of aluminum are affected by the alloying element, its amount, and also its localization in aluminum structure (it can be localized in solid solution or in precipitations).
Mechanical properties of Al, AlMo, AlAg wires with different amounts of alloy additions The Table 3 shows the basic mechanical properties of wires after drawing subjected to uniaxial tensile test.
As it can be seen, the mechanical properties of both groups of aluminum alloys are at a similar level.
Effect of heat treatment on the electrical properties of AlMo and AlAg alloys Conclusions There are following conclusions based on the conducted research: · silver addition in the studied range of temperatures and times does not exhibit significant decline of electrical properties of aluminum, · silver addition in aluminum does not change its mechanical properties and results in a significant reduction of temperature coefficient of resistance, · a molybdenum addition in the studied range of temperatures and times exhibits higher decline of electrical properties of aluminum than silver addition, · molybdenum addition in aluminum does not change its mechanical properties and raises the recrystallization temperature of aluminum.
It should be emphasized that these changes in the electrical properties of aluminum are affected by the alloying element, its amount, and also its localization in aluminum structure (it can be localized in solid solution or in precipitations).
Mechanical properties of Al, AlMo, AlAg wires with different amounts of alloy additions The Table 3 shows the basic mechanical properties of wires after drawing subjected to uniaxial tensile test.
As it can be seen, the mechanical properties of both groups of aluminum alloys are at a similar level.
Effect of heat treatment on the electrical properties of AlMo and AlAg alloys Conclusions There are following conclusions based on the conducted research: · silver addition in the studied range of temperatures and times does not exhibit significant decline of electrical properties of aluminum, · silver addition in aluminum does not change its mechanical properties and results in a significant reduction of temperature coefficient of resistance, · a molybdenum addition in the studied range of temperatures and times exhibits higher decline of electrical properties of aluminum than silver addition, · molybdenum addition in aluminum does not change its mechanical properties and raises the recrystallization temperature of aluminum.
Online since: April 2015
Authors: Ching Wen Lou, Jia Horng Lin, Ting Ting Li
The resulting coverings have excellent puncture resistance and acoustic absorbing properties.
Three types of plain woven fabrics—glass fabric, Kevlar fabric and carbon fabric, were supplied by Jinsor-Tech Industrial Corp., Taiwan, and their mechanical properties were listed in Table 1.
Results and Discussion Puncture-Resisting Properties of Wall Covering Composites Figure. 1.
The density and fineness of compound fabrics affect the flow resistance[4], which is responsiblefor difference acoustic absorbing property of compound fabrics.
Although C-CF has the highest absorption coefficient, its thickness is two factors of improvement for others.
Three types of plain woven fabrics—glass fabric, Kevlar fabric and carbon fabric, were supplied by Jinsor-Tech Industrial Corp., Taiwan, and their mechanical properties were listed in Table 1.
Results and Discussion Puncture-Resisting Properties of Wall Covering Composites Figure. 1.
The density and fineness of compound fabrics affect the flow resistance[4], which is responsiblefor difference acoustic absorbing property of compound fabrics.
Although C-CF has the highest absorption coefficient, its thickness is two factors of improvement for others.
Online since: March 2013
Authors: Y.Y. Guo, C. Zhao, Wei Hua Wu
Considering the milling force coefficient affected by each milling parameters, the orthogonal experiment of four factors and four levels are designed, and the milling coefficient is solved by MATLAB.
Aluminum alloy materials are widely used in national defense and aviation industry owing to its special properties.
Each factor has four levels, L16 (44) orthogonal test table is applied to the four factors of four levels in the experiment, such as shown in Table 1.
Huang, Chinese Mechanical Engineering, 141 (2003) 684 -686 [2] S.
Cao, Modern Mechanical, 10 (2010) 13 [5] X.
Aluminum alloy materials are widely used in national defense and aviation industry owing to its special properties.
Each factor has four levels, L16 (44) orthogonal test table is applied to the four factors of four levels in the experiment, such as shown in Table 1.
Huang, Chinese Mechanical Engineering, 141 (2003) 684 -686 [2] S.
Cao, Modern Mechanical, 10 (2010) 13 [5] X.
Online since: July 2012
Authors: Hua Yong Zhang, Cong Sheng Guan, Xiao Deng Yang, Tian Duo Li
The influencing factors including PPS resin content, molding pressure and molding temperature, and temperature holding time on the conductivity, flexural strength and density of the composite were investigated.
The properties such as the electrical conductivity, flexural strength and density of the composite were tested.
The factors of PPS resin content, the molding pressure, molding temperature, and the temperature holding time which affected the properties of the composite were investigated.
Liu, Study on the preparation and properties of novolac epoxy/graphite composite bipolar plate for PEMFC, Int.
Yin, Research on Properties of Poly (phenylene sulfide) /Graphite Composite Bipolar Plate, J.
The properties such as the electrical conductivity, flexural strength and density of the composite were tested.
The factors of PPS resin content, the molding pressure, molding temperature, and the temperature holding time which affected the properties of the composite were investigated.
Liu, Study on the preparation and properties of novolac epoxy/graphite composite bipolar plate for PEMFC, Int.
Yin, Research on Properties of Poly (phenylene sulfide) /Graphite Composite Bipolar Plate, J.
Online since: March 2008
Authors: Mamtimin Gheni, Halida Musha, Buhalqam Buhalqam
Metal welded bellows are a spring component of the mechanical seal.
It acts as an abirritation (shock absorber) in the Mechanical seal.
(a) (b) (c) (d) (a) V shape wave (b)U shape wave (c) S shape wave (d) cross section of S shape bellow in practice Fig3 Shapes of the bellow wave The mechanical properties of the metal welded seal are strongly affected by the structures of the wave.
All the other information was obtained locally and the cells communicated each other via diffusion of local factors.
Book .Bellow in mechanical seal。
It acts as an abirritation (shock absorber) in the Mechanical seal.
(a) (b) (c) (d) (a) V shape wave (b)U shape wave (c) S shape wave (d) cross section of S shape bellow in practice Fig3 Shapes of the bellow wave The mechanical properties of the metal welded seal are strongly affected by the structures of the wave.
All the other information was obtained locally and the cells communicated each other via diffusion of local factors.
Book .Bellow in mechanical seal。
Online since: April 2014
Authors: Tao Yu, Yang Yao, Yi Yang, Zhi Li Chen, Hong Fei Zheng
Murase et al. conducted a research on how heat collecting efficiency affects water-yielding [5].
This experiment is conducted in a closed room to reduce the affect to environment, maintaining the indoor temperature at 25℃.
The research on how different medium gas affects the performance of the transient cooling of seawater desalination facility a.
There are many reasons for this situation, in addition to medium gas heat preservation, initial temperature being the main influence factors.
To sum up, in summer, selecting carbon dioxide as medium gas can enhance the properties of system under the condition of plenty sunshine and enough radiation.
This experiment is conducted in a closed room to reduce the affect to environment, maintaining the indoor temperature at 25℃.
The research on how different medium gas affects the performance of the transient cooling of seawater desalination facility a.
There are many reasons for this situation, in addition to medium gas heat preservation, initial temperature being the main influence factors.
To sum up, in summer, selecting carbon dioxide as medium gas can enhance the properties of system under the condition of plenty sunshine and enough radiation.
Online since: November 2023
Authors: Sebastian Carrion Ständer, Alper Evirgen, Nora Barschkett, Graham Matheson, Evgeniya Kabliman
Precise control of the processing conditions during AM and post heat
treatment (HT) is required to tailor the final mechanical properties.
Amongst other alloy systems, recent literature studies have shown that the AM processing conditions, the chemical composition, and the HT parameters significantly affect the microstructure and mechanical properties of the well-known Al-Mg based alloys [2].
Precipitation-hardenable Al-Mg alloys with Sc, Zr, or Ti additions represent attractive AM alloy candidates showing excellent mechanical properties [3, 4].
More research is needed to control the precipitation during the AM process and the subsequent post HT, and thus the mechanical properties.
Further development is planned in the future, which considers the intrinsic cyclic HT during AM and the modeling of mechanical properties.
Amongst other alloy systems, recent literature studies have shown that the AM processing conditions, the chemical composition, and the HT parameters significantly affect the microstructure and mechanical properties of the well-known Al-Mg based alloys [2].
Precipitation-hardenable Al-Mg alloys with Sc, Zr, or Ti additions represent attractive AM alloy candidates showing excellent mechanical properties [3, 4].
More research is needed to control the precipitation during the AM process and the subsequent post HT, and thus the mechanical properties.
Further development is planned in the future, which considers the intrinsic cyclic HT during AM and the modeling of mechanical properties.
Online since: October 2023
Authors: Csaba Felho, Ziya Mehdiyev
The main purpose of this investigation is based on the key factors that affect the adoption of metal AM in the automotive industry and to identify potential areas for future research.
Thus, the used materials must be carefully selected to ensure about providing optimal mechanical properties and performance.
The surface finish of the parts produced by metal AM is affected by various factors such as the manufacturing process, material properties, and post-processing methods.
Seifi, “Metal Additive Manufacturing: A Review of Mechanical Properties,” Annu Rev Mater Res, vol. 46, no. 1, pp. 151–186, Jul. 2016
Anisotropy and heterogeneity of microstructure and mechanical properties in metal additive manufacturing: A critical review.
Thus, the used materials must be carefully selected to ensure about providing optimal mechanical properties and performance.
The surface finish of the parts produced by metal AM is affected by various factors such as the manufacturing process, material properties, and post-processing methods.
Seifi, “Metal Additive Manufacturing: A Review of Mechanical Properties,” Annu Rev Mater Res, vol. 46, no. 1, pp. 151–186, Jul. 2016
Anisotropy and heterogeneity of microstructure and mechanical properties in metal additive manufacturing: A critical review.
Online since: July 2008
Authors: Dong Ming Guo, Zhu Ji Jin, Ren Ke Kang, Y.P. Qiao
Introduction
The stability of metal structure (figures and dimensions), is major factor which affects the precision
and the reliability of apparatus mostly.
Based on the results of test before,the distributions of stresses in the layer were all set orthogonally, then only the mechanical properties in the grinding and cross directions were set.
It can be seen from Fig. 4 that the difference in state of stress between two directions affects distribution of structure deformation little.
In a word, the key control factor lies in the distribution of residual stress in grinding direction.
Owing to the poor thermal conductivity of Invar, the grinding thermal effect should impact the surface mechanical property specially, and then the problem about deformation and structural stability of Invar should be further solved in study on thermal effect of Invar's grinding.
Based on the results of test before,the distributions of stresses in the layer were all set orthogonally, then only the mechanical properties in the grinding and cross directions were set.
It can be seen from Fig. 4 that the difference in state of stress between two directions affects distribution of structure deformation little.
In a word, the key control factor lies in the distribution of residual stress in grinding direction.
Owing to the poor thermal conductivity of Invar, the grinding thermal effect should impact the surface mechanical property specially, and then the problem about deformation and structural stability of Invar should be further solved in study on thermal effect of Invar's grinding.