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Online since: July 2021
Authors: Sergii G. Guziy, Vasyl Lashchivskiy, Olena Guzii
Resource-saving materials, structures, buildings and structures: Coll.
Increasing the strength of adhesive joints of wooden structures.
Guzii (2016), Influence of the ratio of oxides and temperature on the structure formation of alkaline hydro-aluminosilicates, Eastern-European Journal of Enterprise Technologies.
Features of the process of carbonization of wooden structures of long service life.
Chemistry,160 p
Online since: August 2017
Authors: Alexis Daniel Negrea, Ileana Nicoleta Popescu, Florina Violeta Anghelina, Carmen Popa, Ivona Petre, Dan Nicolae Ungureanu, Elena Valentina Stoian, Vasile Bratu, Ionica Ionita
Aluminum alloys lend themselves too many engineering applications because of their improved mechanical properties offer great advantages for use in aero-structures through density reduction, stiffness increase, increases in fracture toughness and fatigue crack growth resistance and low cost [1,2].
Slatina, they can be used on aircraft, electronics and electrical, hydraulic valves bodies, pistons, bushings, orthopedic structures, etc.
Thus, to characterize the fine structure of batch was investigated a sample taken from the middle of the specimen, with 20x20 mm dimensions.
As well as S / S 'phase formation which appears to have a variable fine structure from Mg2Si consistency to coherence with the matrix.
Mesrati, Characterization and Modeling of the Mechanical Behavior of Aeronautical Alloy Based Composite, Universal Journal of Chemistry 4(1) (2016) 10-19
Online since: November 2023
Authors: Vjačeslavs Zemchenkovs, Vjaceslavs Lapkovskis, Viktors Mironovs, Jekaterina Kuzmina, Vadims Sokolovs, Viktorija Stankevica
Investigation of a Shock Freezing Concept with Additional Electromagnetic Field Exposure Viktors Mironovs1,a, Vadims Sokolovs2,b, Vjaceslavs Zemcenkovs1,c, Jekaterina Kuzmina1,d, Viktorija Stankevica1,e and Vjaceslavs Lapkovskis3,f* 1Riga Technical University, Faculty of Mechanical Engineering, Institute of Biomedical Engineering and Nanotechnologies, Kipsalas str 6B, Riga, LV-1048, Latvia 2SIA “Freezerbergs”, Pilsoņu Str. 22A k-2, Jūrmala, LV–2015 3Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena str. 3/7, Riga, LV-1048, Latvia aviktors.mironovs@rtu.lv, bvsokolov2003@gmail.com, cvjaceslavs.zemcenkovs@rtu.lv, djekaterina.kuzmina_2@rtu.lv, eviktorija.stankevica@rtu.lv, fvjaceslavs.lapkovskis@rtu.lv Keywords: shock freezing of products, cooling, chilling, electromagnetic fields, defrosting, induction.
In this instance, smaller crystals are generated (Fig. 1), which have a reduced impact [8] on the product’s fibre structure, appearance, and flavour.
Tissues contours of meat products comparing two types of freezing: a – regular (coarse structure); b – shock (finer structure) There are several known methods for modifying the SF (Table 1).
· Crystallisation process that results in a product that is both homogenous and irregularly frozen, containing elements of ice amorphisation and an uneven crystalline structure.
It can also be noted that the crystal structure of ice formed from sodium chloride solutions of given concentrations is broadly similar for conditions with and without applying an electromagnetic field.
Online since: October 2015
Authors: Nur Izzi Md Yusoff, Halil Ceylan, Nor Ghani Md Nor, Peyman Babashamsi
The pavement can be landfilled, recycled, or buried and became a supportive base layer for the next pavement structure.
Jullien, Sensitivity of the LCA allocation procedure for BFS recycled into pavement structures.
Chabot, Evaluation of the structure-induced rolling resistance (SRR) for pavements including viscoelastic material layers.
Materials & structure, 46(4) (2012) 683-696
Handbook of environmental chemistry, 5 (2005) Part F, Berlin, Heidelberg: Springer
Online since: February 2022
Authors: Nawal Mohammed Dawood, Abdul Raheem Abid Ali
The present research is focused exclusively on martensite ageing in Cu-13Al-4Ni (wt. %) SMA and the impact it has on its structure, transformation behaviour, corrosion and shape memory characteristics, and the implications on industrial utilization.
Findings and Discussion Microstructures Fig. 2a shows SEM images of thick plates of martensite phase that have monoclinic crystal structure after sintering at 950 °C for 3 h.
Chemistry in Industry, 2014, 63: 331−344.
Structure and properties of nanostructured Cu−13.2Al−5.1Ni shape memory alloy produced by melt spinning [J].
[36] Al-Humairi, S.N.S., Cu-based shape memory alloys: modified structures and their related properties, book chapter in Recent Advances in Engineering Materials and Metallurgy.
Online since: August 2012
Authors: Ming Ming Cheng, Fei Wang, Lin Jing Ma, Chao Fan
.; furthermore the diversified structures of the raw materials synthesizing rigid polyurethane foam (mainly polymeric polyols) result in variable performances, and flexible processing such as free foaming, molding and spraying on side.
The chemical changes in the complex synthesis process of polyurethane foam affect foam structure and properties directly, which not only involves the chemical reaction of isocyanate, polyol and water, but also involves colloid chemistry of foaming.
Foam system chemical reactions include chain extending, cross linking and foaming process, which have relation with the structure, functionality, molecular weight of materials participating in these reactions.
Foaming process is divided into three stages: first the nucleation of small bubbles in liquid polymer; and then the growth of the bubbles to a predetermined volume; finally the maintenance of the stability of foam structure.
For example, trifunctional polyether can react with polyisocyanate to form cross-linked network structure in a certain degree [13-15].
Online since: September 2005
Authors: Yoshio Sakka, Daniel Chateigner, Tohru Suzuki, Catherine Henrist, B. Ouladdiaf, D. Grossin, E. Guilmeau
Ouladdiaf5 1 Laboratory of Structural Inorganic Chemistry, University of Liège, Sart-Tilman, B4000 Liège, Belgium 2 Center for Applied Technology in Microscopy, University of Liège, Sart-Tilman, B4000 Liège, Belgium 3 National Institute for Materials Science, Sengen 1-2-1, Tsukuba, Ibaragi 305-0047, Japan 4 CRISMAT-ENSICAEN Laboratory, UMR CNRS 6508, 6 Bd.
This type of texture can be best characterized by the c-axis orientation distribution, but this latter, in the case of slightly oriented materials, is difficult to measure using X-rays because of the low structure factors of all the (00l) reflections.
Only ODF calculation can overcome this problem. n that way, working within the framework that combines the classical Rietveld [9] analysis with texture [10] and grain size [11] analysis, as implemented in the MAUD software [12] (Materials Analysis Using Diffraction), permits a comprehensive approach to the crystal structure-texture-microstructure analysis.
In this communication we illustrate the advantages to jointly analyze the structure (Rietveld), texture (WIMV) and microstructure (Popa), of α-Al2O3 ceramics.
Due to the anisotropic magnetic susceptibility of the structure, the high magnetic field applied during the slip-casting is highly effective in rotating the particles and generating a (001) preferred orientation parallel to the magnetic field [5].
Online since: February 2014
Authors: Mohamed Bouazara, Abdelhamid Saoudi
The quasi-static analysis was used to calculate the stabilized cyclic response of a structure directly.
It is an alternative method to obtain the stabilized cyclic response of a structure and avoids the considerable numerical expense associated with a transient analysis.
[2] Haiba M., Barton D.C, Brooks P.C., Levesley M.C., 2002 "Review of life assessment techniques applied to dynamically loaded automotive components" Computers and Structures 80, pp 481–494
V., 2002 "Cracking energy density as a predictor of fatigue life under multiaxial conditions" Rubber Chemistry and Technology, Akron, Mar/Apr, pp 1-17
[10] Xavier Pitoiset, 2001 "Méthodes spectrales pour une analyse en fatigue des structures métalliques sous chargements aléatoires multiaxiaux" Ph.
Online since: November 2013
Authors: K. Palanikumar, K. Shanmugam, N.V. Amudarasan
During the literature investigation, The available effect of welding parameter on solidification structure and geometry of melting region of weldments by laser [20], GTAW [21] and GMAW [22] methods is analyzed.
Hence in metallurgical point of view fine grain structure shows higher strength compared to coarse grain structure. 1000X Fig. 5.
[5] S.Kou and Y.Le: Welding Parameter and the Grain Structure of Weld Metals- A Thermodynamic Consideration, Metallurigical Transcation, 19(A)(1985), p. 1075
Chen: The Effect of Shielding –Gas Compositions on the Microstructure and Mechanical Properties of Stainless Steel Weldments, Materials Chemistry and Physics,55(1997), p. 145-151
[20] A.M.EI-Batahgy: Effect of Lazer Welding Parameters on Fusion Zone Shape and Solidification Structure of Austenitic Stainless Steels,Materials Letters,32(1997), p.155-163
Online since: October 2013
Authors: Mei Shen Wang, Hong Ru Wang, Shuang Peng
The anti-floating structure checking and impact of changes of groundwater characteristics, water pressure and buoyancy and groundwater level are related to the water replenishment.
It has a simple structure, small size and easy maintenance.
In terms of the feature which makes the structure react, many branches of engineering mechanics can be further divided into Statics and Dynamics, such as structural statics and structural dynamics.
Since the force applied to the structure is almost random, the material strength is non-deterministic in nature.
During the design, manufacture and operation of a variety of mechanical equipment, in addition to the relevant professional theories, it may refer series of corresponding basic subjects, such as physics, chemistry, mathematics, materials science, mechanical principles, computer science and control theory; but it also encountered problems of a mechanical structure or components of strength, stiffness, stability and vibration, which shall be solved with the mechanical analysis, experimental and computational mechanics.