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Online since: August 2022
Authors: Katarína Gajdošová, Robert Sonnenschein, Michaela Štefanovičová
Therefore, the investigation of bond properties plays an important role in the design of structures reinforced with GFRP bars.
Bond behavior between FRP bars and concrete is a complex mechanism affected by numerous factors: the type of reinforcement (material and surface treatment), the geometry of the rebar (shape and diameter), the location of the rebar in the reinforced concrete (RC) member, the length of the anchorage, the thickness of the concrete cover, the compressive strength of the concrete, type of loading, etc. [1].
The standard methods for experimental determination of bond properties are the pull-out test and the beam-bond test.
Bond properties are defined as Reinforcement bond with use of the bond model by Bigaj (1999) [7].
Kaklauskas, “Mechanical Properties of the Bond Between GFRP Reinforcing Bars and Concrete,” Mech.
Online since: February 2015
Authors: Fan Yi Bai, Hai Yun Song, Bao Wei Zhang, Lei Cao
It has difficult engineering properties, high water and toxic content.
Improper disposal of river sludge can easily cause secondary pollution affecting the life and work of the people who live around.
Categorization of River Sludge Based on the analysis of the chemical properties and physical composition the classification method and standard have been proposed.
It has the similar properties to sandy soil in silt type, composition, grain size distribution, soil and mechanical characteristics, contaminants content etc. that complies with the criteria for fill materials used in road embankment construction.
TABLE 1, DETAIL INDEX TABLE FOR DIFFERENT TYPES OF SLUDGES Type Particle diameter Mechanical properties Composition Heavy metal Extraction properties Type I(Can be used directly) Even, compact, PD<100mm: can be used for roadbed, PD<150mm: can be used for road foundation.
Online since: June 2020
Authors: Amr Osman, Abdelmoty Elhakeem, Abdalla Ahmed, Saleh Kaytbay
Epoxy resins are one of the most desired packaging materials owing to their elegant adhesion, mechanical and insulation properties.
The structure of the nanofillers strongly affects the particle-to-particle and particle-to-matrix interactions which control the whole properties of the polymer composites [21].
Peijs, Mechanical, electrical and thermal properties of in-situ exfoliated graphene/epoxy nanocomposites, Compos.
Jiang, Mechanical properties of epoxy composites filled with silane-functionalized graphene oxide, Compos.
Ansari, Mechanical properties of graphene oxide (GO)/epoxy composites, HBRC J. 11 (2015), pp. 151–156
Online since: July 2020
Authors: Sukarni Sukarni, Muklisul Anwar
The kinetic evaluation resulted in the respective activation energy (E), pre-exponential factor (log A) and reaction order (n) are 53.57 kJ/mol, 4.4 min-1, and 1.73.
According to Sukarni et al., [4] understanding the thermal decomposition of biomass is important related to a release rate of volatile matter, quantity, and composition that will be affecting the stability and temperature profile during combustion processes.
The thermodynamic property that represents the total heat content of a system including the internal energy is defined as ΔH, and ΔG is a quantity of energy derived from chemical reactions that can be converted into work, whereas ΔS is a parameter thermodynamics which states the amount of energy in the system per unit of temperature that cannot be converted into mechanical work as a result of irreversibility [9].
Complete results of the slope, intercept, activation energy, and frequency factors were presented in Table 2.
Wardana, Potential and properties of marine microalgae Nannochloropsis oculata as biomass fuel feedstock, Int.
Online since: November 2006
Authors: Dong Xia Li, Ying Mei, Fang Jia, Bao Chun Jia
The mechanical properties of the steels are given as follows: The ultimate strength� b is 490 MPa, the yield strength is 343 MPa and the percent elongation� is 22%. 2.
The effect of welding repaired TIG-dressing on fatigue properties of the weld bead The fatigue life of specimen after TIG-dressed increases 100% than that hasn't been TIG-dressed.
The conclusion The imperfection in welding toe is the key factor of the fatigue life.
A STUDY OF FATIGURE STRENGTHS AND LOWER TEMPERATURE PROPERTIES OF TIG DRESSED WELDED JIONTS.
Journal of Mechanical Strength. 2005,27(1): A126~A129
Online since: June 2011
Authors: Rafael Agnelli Mesquita, Hans Jürgen Kestenbach
Several reports have been published in the literature about the effects of such modifications on mechanical properties and tool performance, but only a few of these studies were concerned with the effects on secondary carbide formation.
In fact, this effect has been proven thermodynamically [18], which also affects cementite Spheroidization[19].
The relationship between M3C (cementite) and M7C3 carbide formation is thus found to be the main cause for the different distributions of alloy carbides and for the final mechanical properties after long tempering.
This is a rather surprising result, because very little information is shown in literature about the effect of cementite on the properties of H11 steel, especially when considering the very strong effect on toughness [3].
The second factor is related to C availability, which depends on cementite dissolution [3]; and this dissolution may be delayed by a possible stabilization effect of Cr, Mo and V in solid solution in cementite (Table 2).
Online since: February 2018
Authors: Guang Bao Mi, Liang Ju He, Pei Jie Li, Xian Ye Liang
The first category was the direct method of using wear as a material property of the model.
The Archard model is widely used in the numerical calculation of wear due to its linear properties.
There are many factors that affect the wear rate: (i) the proportion of the surface asperity particles, (ii) the ratio of the deformation volume before and after wear (iii) is proportional to the number of cycles of the contact load (iv) in different processes Percentage of abrasive particles (v) Wear due to periodic changes in stress [8].
The first step analyzes the normal load of 5N at the top of the pin, The elastomeric material properties of the pin affect the contact surface and the contact stress; the second analysis step apply 40rad/S rotation speed at the center of rotation of the disc, wear analysis is also carried out in this analysis step.
A simulation method of thermo-mechanical and tribological coupled analysis in dry sliding systems ☆[J].
Online since: February 2013
Authors: De Yu Tu, Xu Wang, Ai Hua Xu, Xin Chen, Yun Hu
In this paper, the mechanical characteristics of the die holes were analyzed to set up mathematical model in the briquettes forming process.
Jens etc. [4-5] established the mechanical characteristics model of the ring die pelletizing process and the testing results showed the model accuracy.
The finite element mesh model of the die hole is shown in fig.3 and the object material properties are shown in table 2.
Conclusions In this paper, the mechanical characteristics of die holes were analyzed to set up mathematical model in the briquettes forming process.
So that, the inlet angle should be determined by the overall consideration of various factors. 4) If other structural parameters are determinate and equivalent, the length-diameter ratio could impact on the stress distribution of the die hole in shave-preserving section.
Online since: December 2014
Authors: A.M.M. Arouca, F.O. Arouca, L.G.M. Vieira, G.C. Gerkman, J.J.R. Damasceno
Many factors can affect the process of filtration and consequent formation of the filtration cake.
Results and Discussion Tests were conducted with the operating system without mechanical vibration.
These tests were compared to trials conducted in different mechanical vibration tracks: 8, 13, 14, 16, 17, 18, 19 and 21 Hz.
The vibration frequency of 8 Hz has provided 26.5% increase in cycle time of the system without mechanical vibration.
The influences of different vibration values on the properties of the filter cake are mutually independent, and they are decisive for the performance of the proposed system.
Online since: July 2015
Authors: Syarifah Abd Rahim, Nornizar Anuar, Noor Ashila Ramle, Omar El-Hadad
Co-crystal provides a new approach to tailor the physicochemical properties such drug solubility, dissolution rate, stability, bioavailability, hygroscopicity and mechanical properties while maintaining the biological functions of an API [1,2,3,4].
CBZ was of interest because it was one of the water-insoluble drugs; faced issues regarding its poor solubility, bioavailability, stability and mechanical properties [8].
Most of co-crystal solubility studies emphasized on kinetic measurements of dissolution [2] which are mostly influenced by factors such as surface area, phase transformation, particles size distribution, and fluid dynamics [10,11].
Thermal properties were analyzed using differential scanning calorimetric (DSC) at 10 oC/min heating rate under nitrogen atmosphere (50 ml/min).
Kim, Structures and physical properties of the cocrystals adefovir dipivoxil with dicarboxylic acids, J.
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