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Online since: August 2018
Authors: Jie Guang Song, Yue Liu, Song Lin Guo, Xi Ling Zhang, Cai Liang Pang, Lin Chen, Xian Zhong Wang, Ming Han Xu, Jia Zhang
Yttrium aluminum garnet (YAG) materials have a number of unique properties, such that its application is extensive.
The YAG reinforcements in ceramic materials are optimized based on the sintering properties and mechanical properties of the reference.
In the preparation of ultrafine powder, the powder properties and preparation technology have considerable relevance.
It is both a solvent and a mineralizer and can also be used as a pressure transmission medium; by participating in the dialysis reaction and controlling physical and chemical factors, etc., the realization of inorganic compounds Formation and modification.
Jiang, Unique mechanical properties of nano-grained YAG transparent ceramics compared with coarse-grained partners, Mater.
Online since: December 2024
Authors: Irfan A. Rangkuti, Sugeng Mulyono, Vina Nanda Garjati, Dhiya Lugyana, Milah Muhamad Azam, Muslimin Muslimin
However, inorganic waste processing is still not optimal due to several factors, ranging from minimal processing technology to the dangers of side effects of processing, such as smoke and toxic gases, such as carbon monoxide, ammonia, and HCN.
Research has revealed that the sound absorption properties of a material are significantly influenced by its density, porosity, and elasticity [7].
At a sample temperature of 140oC, the rubber on the bottom of the sample does not melt too much, so it cannot stick perfectly to the fabric, affecting the soundproofing performance.
Kumar Panda, “Thermal and acoustic properties evaluation of waste tire and textile reinforced epoxy composites,” Mater.
Fei et al., “Morphological structure, rheological behavior, mechanical properties and sound insulation performance of thermoplastic rubber composites reinforced by different inorganic fillers,” Polymers (Basel)., vol. 10, no. 3, 2018, doi: 10.3390/polym10030276
Online since: July 2014
Authors: Long Chen, Wei Chen, Jian Dong Li, Si Ning Heng, Jia Wu
Research programs How sectional parameters of cooling pipes in hot stamping die affect the quenching performance was studied firstly.
Size of the rectangular box The blank used is boron alloy steel 22MnB5, whose thickness is 1.8 mm and thermodynamic properties can be seen in Table 2.
Thermodynamic properties of the steel Density [kg/m3] 7800 Thermal conductivity [w/(m·˚C] 32 Modulus of elasticity [GPa] 1011 Poisson's ratio 0.3 Specific heat [J/(kg·˚C)] 650 Structure parameters design Fig. 2 is the illustration of cooling pipe section, in which D is the diameter of cooling pipe, S is the distance between cooling pipes and H is the distance between cooling pipes and die surface.
Orthogonal experiments design Hot stamping process involves complex thermo-mechanical coupling.
In experiments, the initial value of D, S and H were taken as the benchmark, then changed the D value as 10mm, 12mm and 15mm, the S value as 30mm, 35mm and 40mm, the H value as 15mm, 20mm and 25mm, so the three factors and three levels orthogonal experiments were designed, as shown in Table 3.
Online since: May 2010
Authors: Sofien Bouzouita, Michelle Salvia, Hachmi Ben Daly, A. Dogui, E. Forest
Several studies are underway to improve the mechanical characteristics of these fibers and its matrix interface properties for better load transfer.
For the case of dried and Fibrolinetreated hemp fibers, large decrease in mechanical and interfacial properties was observed.
Indeed, the mechanical properties of natural fiber reinforced composites are not only dependent on the individual properties of fiber and matrix but also on the efficiency of load transfer between the two constituents.
Fiber mechanical properties Fibers were carefully extracted from hemp mats, and then pasted on cardboard supports (Fig. 2).
[9] Thygesen A., Properties of hemp fiber polymer composites.
Online since: December 2024
Authors: Oleksandr Radchuk
Assessment of the reliability of tailing dams is a complex task taking into account many factors that determine their condition, namely changes in technological parameters during TSF operations (dam height, slope, volume and type of stored material), significant variability of operating loads, impacts and soil properties of the tailings dam, which significantly complicates the choice of methods, calculating schemes and load combinations.
It is assumed that the strength properties of soils are accurately known, unchanged and homogeneous.
The essence of the probability approach is to determine the probability distribution function of the factor of safety (FoS), depending on the probability distribution functions of soil strength properties.
This software uses limit equilibrium theory to determine a critical factor of safety for slope stability of a geomechanical model, which describes the overall geometry, material zones with different strength properties and pore water pressure conditions.
The Mohr-Coulomb model is used to model soil properties containing three main input parameters: cohesion, friction angle and unit weight.
Online since: July 2008
Authors: Luciano A. Lourençato, Davi M. Benati, Eugênio José Zoqui
The development of new low-cost alloys and a new low-cost process could be the key factor for the dissemination of this technology.
Thus, the viscosity is more strongly affected by the amount of liquid than by the silicon content.
The holding time in the semisolid range affects materials in different ways.
Table 3 lists the preliminary tensile properties of samples tested after reaching the desired semisolid temperature, i.e., without holding time or at the highest apparent viscosity.
Additional heat treatments, at T4 or T6 for instance, could improve the final mechanical properties and lead to greater elongation.
Online since: July 2011
Authors: Eric M. Taleff, Michael D. Engelhardt, Todd Helwig, Mohammed Ali Morovat
Taleff2, c and Todd Helwig1, d 1Ferguson Structural Engineering Laboratory, The University of Texas at Austin, 10100 Burnet Road, Building 177, Austin, Texas 78758 USA 2Department of Mechanical Engineering, The University of Texas at Austin, 1 University Station, C2200, Austin, Texas 78712 USA amorovatma@mail.utexas.edu, bmde@mail.utexas.edu, ctaleff@mail.utexas.edu, dthelwig@mail.utexas.edu Keywords: creep buckling, fire, steel columns, time-dependent tangent modulus Abstract.
One of the critical factors affecting the strength of steel columns at elevated temperatures is the influence of material creep.
One of the critical factors affecting the strength of steel columns at elevated temperatures is the influence of material creep.
The parameters a, b and c are temperature-dependent material properties.
Fields and Fields [5] derived equations for these temperature-dependent material properties for ASTM A36 steel.
Online since: November 2013
Authors: Saidur Rahman, I.M. Mahbubul, A. Kamyar, Muhammad Afifi Amalina
Influence of Nanoparticle Type, Size and Weight on Migration Properties of Nanorefrigerant A.
Ding et al. [13] for the first time investigated the major factors influencing the migration characteristics of nanoparticles during pool boiling.
Table 1 shows the properties of TiO2 and Al2O3 nanoparticles.
Properties of nanoparticles used in this experiment.
Amalina, Migration properties of TiO2 nanoparticles during the pool boiling of nanorefrigerants, Ind.
Online since: July 2011
Authors: Ya Feng Ji, Hong Zhang, Qing Quan Duan, Yan Bin Cao
Through the mechanics analysis of CT with finite element method (FEM) in working state at the wellhead, the results show that high stress and high strain are the main factors which cause CT failure.
Although a few papers have been presented to describe the failure life of coiled tubing, the basic reasons affecting the coiled tubing working life are not discussed in detail.
The other way is mechanical analysis, much simpler than the first method.
To get the axial strain without internal pressure, considering the CT string fatigue life influencing factors and boundary conditions, CT fatigue life mechanical model is established at the wellhead.
Vol39(5), 2010, p10-13 [4] Bi, Z.Y., Xian, L.Y. and Jing, X.T: Low Cycle Fatigue Property and Life of Coiled Tubing under Large Deformation.
Online since: December 2013
Authors: Hamimah Abdul Rahman, Andanastuti Muchtar, Sufizar Ahmad, Hatijah Basri, M.F. Kamaruddin, Muhamad Subri Abu Bakar
Effects of Calcination Factors on the Composite Cathode Powder LSCF-SDC Carbonate by Using Dry Milling M.S.A Bakar1,a, M.F Kamaruddin1,b, S.
The effects of calcination factors on the La0.6Sr0.4Co0.2Fe0.8O3-δ-SDCC (LSCF-SDCC) composite cathodes powder were investigated.
Research has been conducted in developing LSCF with SDCC and this combination is expected to yield outstanding properties to serve as composite cathode materials for low temperature SOFCs (LTSOFCs).
The molten carbonate in SDCC powder exist as an amorphous phase and not affected the phase of the pure SDC.
Abdullah, Structure and thermal properties of La0.6Sr0.4Co0.2Fe0.8O3-δ – SDC carbonate composite cathodes for intermediate-to low-temperature solid oxide fuel cells, Ceramics International. 38 (2012) 1571-1576
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