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Online since: September 2014
Authors: Aeslina binti Abdul Kadir, Ahmad Shayuti Bin Abdul Rahim, Hidra Hasbee Bin Jamil
Physical and mechanical properties were also determined which are compressive strength, shrinkage, density and initial rate of suction.
Materials and Method Physical and Mechanical Properties Mosaic sludge waste was collected at the mosaic manufacturer in Johor.
Water content is an important factor affecting the quality of the brick, therefore compaction test was conducted to determine the optimum moisture content (OMC).
Shrinkage depends upon several factors.
These factors include the properties of the components, the proportion of the components, mixing manner, the amount of moisture, dry environment and member size.
Materials and Method Physical and Mechanical Properties Mosaic sludge waste was collected at the mosaic manufacturer in Johor.
Water content is an important factor affecting the quality of the brick, therefore compaction test was conducted to determine the optimum moisture content (OMC).
Shrinkage depends upon several factors.
These factors include the properties of the components, the proportion of the components, mixing manner, the amount of moisture, dry environment and member size.
Online since: January 2014
Authors: Xiao Long Li, Nan Liu, Peng Mou, Dong Xiang, Gang Shen, Yong Yang, Jing Min Jiang
Because the working condition of bridge crane is complicated, adding work load randomness, the main carrying structure of bridge crane endure fatigue load, which increases uncertain factors for bridge crane's safety and reliability.
The key problem is that welding quality of welding places is to achieve the design standard, in addition to steel plates meeting mechanical properties.
In addition to the influence of welding quality, there exists an important factor affecting fatigue failure of main girder which is complicating alternated load in the bridge crane service process.
Chemical properties of material are shown in table 1 and mechanical properties of material are shown in table 2.
Table 1 The chemical properties of material Q345B steel Chemical elements C Si Mn P S Measured value 0.14 0.13 0.37 - 0.01 Standard value 0.12~0.20 ≤0.30 0.30~0.70 ≤0.045 ≤0.045 Table 2 The mechanical properties of material Q345B steel Mechanical properties Tensile strength MPa Yield strength MPa Elongation % Measured value 485 345 31 Standard value 375~500 ≥235 ≥26 Test results.
The key problem is that welding quality of welding places is to achieve the design standard, in addition to steel plates meeting mechanical properties.
In addition to the influence of welding quality, there exists an important factor affecting fatigue failure of main girder which is complicating alternated load in the bridge crane service process.
Chemical properties of material are shown in table 1 and mechanical properties of material are shown in table 2.
Table 1 The chemical properties of material Q345B steel Chemical elements C Si Mn P S Measured value 0.14 0.13 0.37 - 0.01 Standard value 0.12~0.20 ≤0.30 0.30~0.70 ≤0.045 ≤0.045 Table 2 The mechanical properties of material Q345B steel Mechanical properties Tensile strength MPa Yield strength MPa Elongation % Measured value 485 345 31 Standard value 375~500 ≥235 ≥26 Test results.
Online since: September 2009
Authors: Hua Li, Zhen Yin, Zheng Li
Study on the Properties of New Ultrasonic
Vibration Internal Grinding System
Hua Li1,a
, Zhen Yin
2,b and Zheng Li3,c
1,2
School of Mechanical & Electrical Engineering, Suzhou University of Science & Technology
Suzhou,China, 215011
1,2,3
School of Mechanical & Electrical Engineering, Henan University of Technology,
Zhengzhou, China, 450007
a
Lihua@haut.edu.cn, b
yinzhen12@yahoo.com.cn, c20575845@qq.com
Keywords: FEM, Ultrasonic vibration, Internal grinding
Abstract.
Based on the FEM, the properties of the vibrator and the shaft in new ultrasonic vibration internal grinding system were studied in this paper.
The vibration mode of the vibrator is affected by sleeve.
The vibration amplitude of abrasive wheel is one of the primary performance factors in the process of ultrasonic vibration internal grinding.
Fig.18 Test points of on the outer sleeve Fig.19 The vibration amplitude Conclusions Based on the FEM , the characteristics of the whole vibrator and shaft in the new UVG system have been analyzed, and the design method of new system is proposed based on the influencing factors.
Based on the FEM, the properties of the vibrator and the shaft in new ultrasonic vibration internal grinding system were studied in this paper.
The vibration mode of the vibrator is affected by sleeve.
The vibration amplitude of abrasive wheel is one of the primary performance factors in the process of ultrasonic vibration internal grinding.
Fig.18 Test points of on the outer sleeve Fig.19 The vibration amplitude Conclusions Based on the FEM , the characteristics of the whole vibrator and shaft in the new UVG system have been analyzed, and the design method of new system is proposed based on the influencing factors.
Online since: March 2014
Authors: Ching Wen Lou, Rui Wang, Jia Horng Lin, Cheng Wang, Ruo Si Yan
The results showed that the addition of Kevlar fibers enhanced the mechanical properties of hybrid nonwovens.
Two key factors during thermal treatment are temperature and duration.
Tear properties Figure 3 demonstrates the tear strength of HRBP/Kevlar hybrid nonwovens as a result of various thermal treatment conditions and fiber blending ratios.
Bursting properties Bursting strength is mainly related to the tensile strength and elongation of the nonwovens.
The hybrid nonwovens exhibited excellent mechanical properties with the addition of Kevlar fibers.
Two key factors during thermal treatment are temperature and duration.
Tear properties Figure 3 demonstrates the tear strength of HRBP/Kevlar hybrid nonwovens as a result of various thermal treatment conditions and fiber blending ratios.
Bursting properties Bursting strength is mainly related to the tensile strength and elongation of the nonwovens.
The hybrid nonwovens exhibited excellent mechanical properties with the addition of Kevlar fibers.
Online since: November 2012
Authors: Long Lu, Guang Guang Feng
Analyses of substrate negative bias voltage on morphology thickness of the film, bonding strength and micro hardness and other properties.
Introduction In multi-arc ion plating, the morphology, composition, thickness, etc. will change with different process parameters on the film, and then affecting the performance of the film.
Substrate negative bias is one of the important factors in the coating process.
The effect of substrate negative bias on the morphology and microstructure composition and properties of multilayer composite films was studied on this paper.
There are two major factors for the increase of adhesion.
Introduction In multi-arc ion plating, the morphology, composition, thickness, etc. will change with different process parameters on the film, and then affecting the performance of the film.
Substrate negative bias is one of the important factors in the coating process.
The effect of substrate negative bias on the morphology and microstructure composition and properties of multilayer composite films was studied on this paper.
There are two major factors for the increase of adhesion.
Online since: May 2010
Authors: Chen Ning, Ming Hui Wang
This research seeks to examine the premise that VMA is indeed a valid critical parameter
and that the sole aggregate factor affecting the magnitude of critical VMA is the nominal maximum
aggregate size.
2 Material properties
It was decided that the asphalt used for the study would be a grade commonly used in China, an
unmodified 70-A binder.
(2) Aggregates Because the focus of the study was how aggregate-related factors affect critical VMA it was essential to select aggregates that were measurably different using common aggregate tests, e.g., fine and coarse aggregate angularity, flat and elongated particles, etc.
Ideally, it would have been desirable to select aggregates based on specific (i.e., predetermined) test properties for comparison, but this is not practically possible.
For each mixes that became plastic (i.e., unsound), the volumetric properties were calculated at the critical point.
(3) Critical VMA is different in three AC-20 asphalt mixtures that mean graded type decision of critical VMA shows the important factors.
(2) Aggregates Because the focus of the study was how aggregate-related factors affect critical VMA it was essential to select aggregates that were measurably different using common aggregate tests, e.g., fine and coarse aggregate angularity, flat and elongated particles, etc.
Ideally, it would have been desirable to select aggregates based on specific (i.e., predetermined) test properties for comparison, but this is not practically possible.
For each mixes that became plastic (i.e., unsound), the volumetric properties were calculated at the critical point.
(3) Critical VMA is different in three AC-20 asphalt mixtures that mean graded type decision of critical VMA shows the important factors.
Online since: August 2017
Authors: Charnnarong Saikaew, Worakarn Sawatwor
Many researchers have studied the effects of heat treating processes on mechanical properties, corrosion and wear resistance of various martensitic stainless steels.
It is crucial to comprehensively understand the role of heat treating processes on the mechanical properties of the steels with a systematic approach.
Many researchers have studied the effects of heat treating processes, especially quenching temperature, quenching time, tempering temperature and tempering time, on mechanical properties.
Wen et al. [3] studied the influences of tempering temperature on the volume fraction of retained austenite and a variety of mechanical properties by holding the quenching temperature constant at 1050 ºC and varying tempering temperature range of 550-750 ºC in order to improve the strength and impact energy of Cr15 super martensitic stainless steel.
ANOVA was used to investigate whether there was statistically significant factor of quench soaking time affecting hardness and impact energy of the heat-treated martensitic stainless steel AISI 440C.
It is crucial to comprehensively understand the role of heat treating processes on the mechanical properties of the steels with a systematic approach.
Many researchers have studied the effects of heat treating processes, especially quenching temperature, quenching time, tempering temperature and tempering time, on mechanical properties.
Wen et al. [3] studied the influences of tempering temperature on the volume fraction of retained austenite and a variety of mechanical properties by holding the quenching temperature constant at 1050 ºC and varying tempering temperature range of 550-750 ºC in order to improve the strength and impact energy of Cr15 super martensitic stainless steel.
ANOVA was used to investigate whether there was statistically significant factor of quench soaking time affecting hardness and impact energy of the heat-treated martensitic stainless steel AISI 440C.
Online since: September 2013
Authors: Li Qiang Jin, Jin Ba, Wen Run Yao
Its rheological properties were also discussed.
Its rheological properties were also discussed.
Rheological properties.
Brookfield LVDV-IIIrheometer was used to analyze rheological properties of tara gum solutions with varied concentration.
Both viscosity and elasticity of tara gum solution, are easily affected by the effect of shear stress.
Its rheological properties were also discussed.
Rheological properties.
Brookfield LVDV-IIIrheometer was used to analyze rheological properties of tara gum solutions with varied concentration.
Both viscosity and elasticity of tara gum solution, are easily affected by the effect of shear stress.
Online since: January 2013
Authors: Xi Na Gong, Jin Feng Sun, Kun Quan, Yong Qiang Meng
The property of titanium carbonitride synthesized by each method is affected by raw materials, parameters and external conditions.
The other factors include: the kinds of the sintered materials, thermal runaway in the heating, difficulty for temperature measurement and controling, cracking of the sintered body and low sintered production.
The composition, properties and application of YN series of Ti(C,N) based cermet cutting tools were listed in table 2.
The grade, composition and properties of the foreign Ti(C,N) based cermet cutting tools were listed in table 3[11].
Mechanical industry press, 2006: 104-105.
The other factors include: the kinds of the sintered materials, thermal runaway in the heating, difficulty for temperature measurement and controling, cracking of the sintered body and low sintered production.
The composition, properties and application of YN series of Ti(C,N) based cermet cutting tools were listed in table 2.
The grade, composition and properties of the foreign Ti(C,N) based cermet cutting tools were listed in table 3[11].
Mechanical industry press, 2006: 104-105.
Online since: January 2005
Authors: Zin Hyoung Lee, Seong Ho Yang
The formation of nitrogen gas pores is affected by various factors such as solidification
sequence, solubility of nitrogen, cooling rate, melt pressure, nitrogen content etc.
Introduction Nitrogen alloying to stainless steel is very effective for improving not only mechanical properties but also corrosion resistance such as pitting resistance in NOx environment [1].
And the factors to affect the nitrogen gas pores were discussed. 2.
It is thought that the formation of nitrogen gas pores is mostly affected by nitrogen content, since solidification sequence doesn't change from FA mode to A mode at a given variation of nitrogen content. 3.3 The effect of cooling rate It is known the fact that increasing cooling rate increases porosity, because higher cooling rate leads to larger segregation [11].
Conclusions Nitrogen porosity in Fe-16Cr-3Ni-9Mn stainless steel was investigated and the factors to affect nitrogen porosity were discussed.
Introduction Nitrogen alloying to stainless steel is very effective for improving not only mechanical properties but also corrosion resistance such as pitting resistance in NOx environment [1].
And the factors to affect the nitrogen gas pores were discussed. 2.
It is thought that the formation of nitrogen gas pores is mostly affected by nitrogen content, since solidification sequence doesn't change from FA mode to A mode at a given variation of nitrogen content. 3.3 The effect of cooling rate It is known the fact that increasing cooling rate increases porosity, because higher cooling rate leads to larger segregation [11].
Conclusions Nitrogen porosity in Fe-16Cr-3Ni-9Mn stainless steel was investigated and the factors to affect nitrogen porosity were discussed.