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Online since: March 2022
Authors: Khairil Azman Masri, Ramadhansyah Putra Jaya, Mohd Safwan Hakim Norbi, Shamimi Mohd. Zali Nur Syafiqah
Mechanical Properties of Stone Mastic Asphalt Incorporating Nano Titanium Modified Asphalt Binder Mohd Safwan Hakim Norbi1,a, Khairil Azman Masri1,b*, Nur Syafiqah Shamimi Mohd.
This study focuses on the mechanical properties enhancement of SMA with the existence of nano-titanium (TiO2) modified asphalt binder.
These reflect to the improvement of bitumen properties.
Shafabakhah, 2016, "Evaluating mechanical properties of stone mastic asphalt modified with Nano Fe2O3."
Mechanical properties of porous asphalt with nano silica modified binder.
Online since: October 2020
Authors: Yong Guo Wang, Y. Li, W. Yang, W.P. Dong, Wen Wang
There are many factors influencing the cutting temperature, such as the properties of workpiece materials, geometric parameters of the tool, the use of cutting fluid and so on.
Introduction Titanium alloy material has excellent mechanical properties, low density and good corrosion resistance, it is the main consumption material of aerospace industry.
In order to reduce the number of experiments, based on the determination of the factors and levels of the experiment, this paper selects four factors and three levels orthogonal table L9(34) for orthogonal test design.
The chemical composition and mechanical properties of TC18 titanium alloy are shown in table 3 and table 4 respectively.
Materials & Design, 2014,63:798-804 [16] Sun SY, Lv WJ (2016) Microstructure and Mechanical Properties of TC18 Titanium Alloy.
Online since: September 2013
Authors: Lian Hua Zhao, Xiao Bo Wei, Xiao Guang Li
The pros and cons of the five rubbers are analyzed by friction and wear properties of the above experimental.
Conveyor belts is between the metal rotor and rubber bushing under dry friction condition, the dry friction of rubber wear will directly affect the life capacity of belt [5-8].
Friction coefficient with time under dry sliding (a) CR (b) blended rubber by 8:2 ratio (c) blended rubber by 5:5 ratio (d) blended rubber by 2:8 ratio (e)EPDM Sliding process, the working conditions (load and speed), friction and wear is often due to temperature rise caused a lot of material mechanical properties (elastic modulus and hardness), and lubricating properties as the interface temperature rise degradation, thus affecting their tribological behavior [9].
Loads must change at the same speed, with increasing load , the test conditions of rapid temperature rise would have an impact , to do the test of change load , when the load is low , the impact of load variation on the friction coefficient significantly in the temperature on the friction coefficient , when the load increases to a certain value , the change of load on the friction coefficient is weakened the temperature change has become a major factor influencing the fluctuations in the friction coefficient , but the determinants of the coefficient of friction is the material properties.
An investigation of mechanical and rheological properties of EPDM/PVC blends: influence of anhydride additives, mixing procedure and EPDM form.
Online since: June 2012
Authors: Hai Qing Ren, Yong Zhong, Wan Li Lou, Xia Zhen Li
Therefore, the effects of defects such as knots on the mechanical properties of dimension lumber need further research.
While, the full scale test is at the initial stage in china and the effect of knots on the mechanical properties of full scale specimens is still in blank.
Results and Discussions Effect factors of the MOE for clear wood specimens.
There were close relationships between density and mechanical properties of wood specimens [9, 10].
Meanwhile, as to the dimension lumber whose bending strength was affected by the defects of knots, the predictive bending strength was more consistent with the measured values when density and knots as the main effect factors [13, 14]. 26 full scale specimens were initiated in the weakest location of the knot.
Online since: June 2022
Authors: Cui Liang, Jin Jun Tang, Chen Guang Xu
It can exist in the alloy matrix with a large mass fraction and maintain high mechanical and physical properties at high temperature.
Therefore, the effects of the type, content, morphology and distribution of Ni rich heat resistant phase on the high temperature mechanical properties of the alloy were studied[5,6].
Thus, the sharp decline of mechanical properties of the alloy caused by the increase of temperature is greatly delayed.
The main factors affecting the thermal strengthening of these second phases are the properties of the second phase and the shape, size and distribution of the second phase.
As shown in Figure 4, M142 is a eutectic aluminum alloy with small scale of primary Si phase and good mechanical properties.
Online since: March 2014
Authors: Ping Cao, Zhan Jun Zhang, Yong Qiang Zhu, Feng Gao
The physical properties of the finished product also tend to have higher requirements.
These two indexes have indicative function in paper physical properties.
The work will investigate the effects on the improvement of the paper physical properties and the production environment of papermaking industry by comparing the physical properties of paper pattern with new cleaning additives.
K - Conversion factor of the range of measurement.
A brief talk on the influence factors of the stiffness and ring crush strength [J].
Online since: May 2012
Authors: Wei Shao, Bin Lin
Freezing pressure and its influencing factors of deep clay layer in the Huainan mining area Wei Shao1 , Bin Lin2 1Huainan Coal Mine Survey and Design Institute, Huainan, Anhui Province,232001 2The School of Civil Engineering and Architecture, AnHui University of Science and Technology Anhui, Huainan 232001, Email: linbin8910@163.com Key words: deep calcareous clay, formation, freezing pressure, temperature Abstract: Gu Bei coal mine deep shaft freezing pressure of calcareous clay dynamic monitoring showed that the freezing pressure of the calcareous clay fastest grow in the first 2 weeks after the sidewall concrete pouring , freezing pressure has obvious direction .
According to Gu bei check of shaft hole of geologic histogram , Hefei Coal Design Institute sidewall structure design diagrams and the Gu bei permafrost physical and mechanical performance test and other data , two horizontal earth pressure monitoring .
Influence factors of freezing stress Research has shown that [1-2], Freezing pressure of the soil is mainly affected by the freeze wall deformation , soil properties , depth of frost heave on the wall refreezing thawed soil and soil water swelling the combined effect of the deformation and wall permafrost temperature and construction process and other factors,Laboratory test results show that [3], the less water-absorbent expansive calcareous clay, and under certain conditions and construction technology of soil, the thick layer of calcareous clay freezing pressure is mainly affected by the deformation of the frozen wall of frost heave and temperature control. 3.1 The influence of side wall temperature on the freezing pressure Found by the monitoring of the freeze sidewall temperature in different directions ,the temperature variation of the well to help is also showing a similar trend as the freezing pressure ( Figure 3) Temperature change also presents a similar freezing pressure
Comparison of Figure 1 and Figure 8 illustrates, shaft face rate freeze for floor pressure is affecting, freezing pressure of growth rate and the rate there is a positive correlation between floor. 3.3 Effects of frost-heaving force of freezing pressure Wall concrete hydration hot will led to part freeze wall melted, its back frozen Hou of frozen expansion force is constitute freeze pressure of a main part, due to in limited segment high of deep calcium stick soil in the, while its itself moisture and permeable sexual are lower, on the around phase p formation are is freeze State, so impossible has too more of free water on back frozen layer for water supply.
Online since: October 2011
Authors: Shu Li Wang, Dun Wu Chen, Ran Wang
For deep excavation, it is the bad strata that affect the slope stability, the seepage prevention and anchoring effects.
It is the main bad strata to affect the foundation and cause environmental hazards.
The mechanical properties used in numerical analysis are indicated in Table 2.
Table 2 Mechanical properties used in numerical analysis a. see reference [3]~[6]; b. see reference [2]~[6] soil cohesion (kPa) friction (°) layer thick (m) unit weight (kN/m³) elastic modulus (MPa) bearing force (kPa) Poisson’s ratio ν plain fill 12 15 4.6 18 6 20 0.3 silty clay with sludgy 15 20 7.8 17 2.5 60 0.31 slate 35 30 - 23 30 300 0.26 Stone columna 20 ~40 - 20 ~2 150 0.3 Deep mixing columnb 10.5 35 - 16 100 - 0.2 Numerical Analysis of the Foundation The Fig. 2 is the foundation model designed.
The Strength Reduce Factor (SRF) is the critical strength reduction factor.
Online since: January 2005
Authors: Changjiang Song, Zhen Ming Xu, Jian Guo Li
So the parts obtained by it are incontaminated, homogeneous,fine microstructure and better mechanical properties, and it has potential applications to the high melting or active metals, etc [3-6].
Experiments and Results Effect Factors of Temperature Field and Electromagnetic Force.
All the effect factors of the electromagnetic force are also the effect factors of the temperature field.
In addition, there are other factors affect the temperature field in the EMCS process, for example the cooling ability of the coolant and the drawing speed of shaped sample.
The effect factors of the electromagnetic force and the temperature field were summarized.
Online since: May 2012
Authors: Tian Li, Yang Wang
The goals of the study were two fold, firstly to compare with traditional stud and secondly to search the affect factors of capacity, get calculation equations .We present an analysis of double-nut stud, include different concrete strength and different stud size.
Fig. 1 Specimen of double-nut stud Fig.2 Load-slip curve of two stud Table 1 Details of specimen Specimen Numbers (N/mm2) d(mm) h(mm) d1(mm) h1(mm) d2(mm) h2(mm) D23C25 25 19 100 28.5 9.5 23 20 D23C30 30 19 100 28.5 9.5 23 20 D23C40 40 19 100 28.5 9.5 23 20 D23C50 50 19 100 28.5 9.5 23 20 D26C30 30 19 100 28.5 9.5 26 20 D30C30 30 19 100 28.5 9.5 30 20 D35C30 30 19 100 28.5 9.5 35 20 Performance factors of double-nut stud Concrete strength Fig3. shows the load-slip curve of double-nut stud with different concrete strength C25, C30, C40 and C50.
(1) (2) Where , d for stud diameter, fu for ultimate tensile strength of stud , fck for compressive strength of concrete standard values, Ecm for concrete average elastic modulus, γv for partial safety factor for resistance=1.25, α according to the following circumstance value: When , (3) When , (4) Nie Jianguo[4],get the fixed formula, take calculation formulas into account, which is ECCS in 1981 and Canada steel structure design codes
Table2 Comparation of simulated bearing capacity and calculation equations Specimen Numbers Simulated /kN EC4 Document[4] GB50017-2003 /kN /kN /kN D23C25 122.5 62.7 0.51 91.2 0.74 70.4 0.57 D23C30 129.4 71.2 0.55 99.2 0.77 79.8 0.62 D23C40 130.2 85.4 0.66 99.2 0.76 96.0 0.74 D26C30 164.9 71.2 0.43 99.2 0.60 79.8 0.48 D30C30 196.8 71.2 0.36 99.2 0.50 79.8 0.41 Conclusions In this paper, analysis the new stud, through the comparison with the traditional stud, take the mechanical properties and affect factors into account.
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