scholarly journals The Influence of the Formulation Components and the Mixing Technology on Physical and Mechanical Properties of Abrasive Wheel

2019 ◽  
Vol 297 ◽  
pp. 09005
Author(s):  
Andrey Romanenko ◽  
Dmitry Shatko ◽  
Pavel Strelnikov
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Abrasive Tool ◽  
Mixing Process ◽  
Abrasive Material ◽  
Abrasive Wheel ◽  
Ceramic Bond ◽  
Material Grain Size ◽  
Practical Recommendations ◽  
Selection Of

The influence of the components of the abrasive tool formulation and the technology of mixing the components on physical and mechanical properties is discussed in the article. The technology for the manufacture of a ceramic-bond abrasive tool is presented. The main factors that determine the properties of an abrasive tool are described. The data used in the calculation of the formulation are analyzed, such as: type of abrasive material, grain size, hardness, type of bond, structure, filler. The importance of the process of mixing components of grinding tools at the stage of their manufacture is substantiated.The generalized statistical models of the dependence of physical and mechanical properties on the components of the formulation are presented. The model describing the abrasive mixing process is developed. Based on the results obtained, conclusions are formulated in the form of practical recommendations for improving the properties of the abrasive wheel based on the selection of the components of the formulation and the technology of their mixing.

scholarly journals Regression analysis and statistical examination of Knoop Hardness on abrasion resistance in Lyca Beige Marbles

Filomat ◽  
2020 ◽  
Vol 34 (2) ◽  
pp. 609-614
Author(s):  
Burcu Aydin ◽  
Fusun Yalcin ◽  
Ozge Ozer ◽  
Gurhan Yalcin
Keyword(s):  
Mechanical Properties ◽  
Regression Analysis ◽  
Physical And Mechanical Properties ◽  
Production Method ◽  
Knoop Hardness ◽  
Decomposition Products ◽  
Marble Quarries ◽  
Selection Of

Marbles are secondary decomposition products formed by metamorphism of limestone. Effective classification of marble quarries in terms of quality enables the selection of a sustainable production method and safety application. This evaluation is based on physico-mechanical properties of the samples. Obtained results of physico-mechanical properties of the marbles were statistically analyzed using Stata 14 and SPSS 21 software. The marbles indicated mostly normal physical and mechanical properties. A strong inverse relationship exists between Abrasion Value and Knoop Hardness Determination that indicates a significant nonlinear relationship. Samples were distinguished into 3 groups of close similarity and related properties. The estimated value of the parameters is in the 95 % confidence interval. The equation obtained by regression analysis was used for the determination of resistance to abrasion.

scholarly journals SIFAT FISIK DAN MEKANIK KAYU SALAM (Syzygium polyanthum (Wight)Walp.) BERDASARKAN POSISI KETINGGIAN PADA BATANG

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
. Erma ◽  
Fadiilah H Usman ◽  
. Muflihati
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
Physical And Mechanical Properties ◽  
Modulus Of Rupture ◽  
Average Height ◽  
Class Iii ◽  
Lightweight Construction ◽  
Brown Colour ◽  
Wood Demand ◽  
Selection Of

Physical and mechanical properties of wood is one of the basic properties that need to be known in the selection of wood, because the physical and mechanical properties of wood are not the same height on the stem. Increased wood demand gives the opportunity to use wood that is not yet known for its marketing, one of which is Salam wood (Syzygium polianthum (Wight) Walp). The purpose of this research was to determine the physical and mechanical properties of Salam wood based on the height of the stem so that Salam wood can be optimally utilized by testing based on Classification SNI – 5 PKKI 1961. Methods of making test and test examples based on British Standard Methods No. 373-1957. The results showed that Salam wood has physical properties with an average  brown colour, the moisture content 3,13 % , density  0,58 kg/cm2 , Depreciation 2,59 %. Salam has mechanical properties with an average height position stem from base to tip with Modulus of Elastiscity (MOE)  97.701,54 , Modulus of Rupture (MOR) 659,18  and  Modulus Crushing  Streang 342,86 . Salam can be classified into strong class III and based on its properties and mechanics, it is suitable for use as a lightweight construction and furniture.Keywords: Density, depreciation, MCS, MOE, moisture content, MOR

WOOD SELECTION OF ANCIENT TEMPLES IN THE SIKKIM HIMALAYAS

IAWA Journal ◽  
2014 ◽  
Vol 35 (4) ◽  
pp. 444-462 ◽  
Author(s):  
Mechtild Mertz ◽  
Sangeeta Gupta ◽  
Yutaka Hirako ◽  
Pimpim de Azevedo ◽  
Junji Sugiyama
Keyword(s):  
Mechanical Properties ◽  
Wood Species ◽  
Physical And Mechanical Properties ◽  
Eastern Himalayas ◽  
Buddhist Temple ◽  
Building Type ◽  
Indian State ◽  
Religious Considerations ◽  
Selection Of

Microscopic wood identifications were performed on five Buddhist temple structures and on one secular building located in Sikkim, an Indian state in the Eastern Himalayas. In all, twenty wood species were identified, two of which – Michelia (Magnolia) doltsopa and Picea cf. spinulosa – were considered in more detail. Building type, specific physical and mechanical properties of the wood species, local availability, and religious considerations were apparently the leading criteria for timber selection.

scholarly journals FUNCTIONAL COATINGS APPLICATION FOR STRENGTHENING AND RESTORATION OF AVIATION PRODUCTS

Aviation ◽  
2005 ◽  
Vol 9 (4) ◽  
pp. 39-45 ◽  
Author(s):  
Sergey Dmitriyev ◽  
Anatoly Koudrin ◽  
Vasily Labunets ◽  
Miroslav Kindrachuk
Keyword(s):  
Mechanical Properties ◽  
Surface Hardening ◽  
Composite Coatings ◽  
Erosive Wear ◽  
Physical And Mechanical Properties ◽  
Functional Coatings ◽  
Surface Strengthening ◽  
Restoration Techniques ◽  
Modern Technologies ◽  
Practical Recommendations

The article deals with the analysis of modern technologies of surface hardening and restoration of the working parts of aviation products. The technologically sophisticated methods of obtaining multifunctional composite coatings with an application of effective sources of energy are described. These methods permit structures with predetermined physical and mechanical properties to be formed on working surfaces. The results of testing alloys and coatings under conditions of abrasive and erosive wear are tested. Practical recommendations on application of the aircraft parts surface strengthening and restoration techniques, taking into account conditions of operation, are brought forward.

Introduction

2004 ◽  
pp. 1-6
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Historical Development ◽  
Physical And Mechanical Properties ◽  
Casting Process ◽  
The Other ◽  
Aluminum Castings ◽  
Selection Of

Abstract This chapter first introduces the various factors that may alter the physical and mechanical properties of aluminum castings that are addressed in the other chapters in the book. Then, it presents the historical development of aluminum castings, followed by a discussion on the advantages and limitations of aluminum castings. Next, the chapter describes the major trends that are influencing the increased use of aluminum castings. Finally, it introduces the considerations involved in the selection of an appropriate aluminum alloy and casting process for a given application.

Physical and Mechanical Properties of WC-Co Submicron Powders Using P/M Technique

2014 ◽  
Vol 879 ◽  
pp. 12-15 ◽  
Author(s):  
Ahmad Aswad Mahaidin ◽  
Mohd Asri Selamat ◽  
Samsiah Abdul Manaf ◽  
Talib Ria Jaafar
Keyword(s):  
Mechanical Properties ◽  
Grain Growth ◽  
Vanadium Carbide ◽  
Physical And Mechanical Properties ◽  
Growth Inhibitor ◽  
Cold Isostatic Pressing ◽  
Mixing Process ◽  
Sintering Process ◽  
Grain Growth Inhibitor ◽  
Work Done

The properties of WC-Co are greatly improved with the use of submicron powders. However, grain growth tends to occur during the sintering process which causes the properties to deteriorate to some extent. Free carbon and vanadium carbide are added in this study to serve as grain growth inhibitor. The effect of these two materials is evaluated based on WC-Co properties. In this work, the powders are mixed together via wet mixing process, compacted and undergo cold-isostatic pressing (CIP) before the samples are sintered in the temperature range of 1350-1450°C under nitrogen-based atmosphere. The physical and mechanical properties of the WC-Co sintered powders were analysed. Based on the work done, the WC-Co-C has a better properties compared to WC-Co-VC.

Experimental Study of Relations between Synchronous Rotor Speed and Mixing Process

2012 ◽  
Vol 501 ◽  
pp. 243-246
Author(s):  
Xian Kui Zeng ◽  
Shuai An ◽  
De Wei Zhang ◽  
Dong Wang
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Temperature Increase ◽  
Physical And Mechanical Properties ◽  
Experimental Results ◽  
Mixing Process ◽  
Rotor Speed ◽  
Unit Consumption ◽  
Internal Mixer ◽  
Rotor Structure

Rotor speed is one of the most important technical characteristics of the internal mixer. The effects of rotor speed on mixing process have been studied. In the experiments, three types of synchronous rotors which were two-wing synchronous rotor, four-wing synchronous rotor and six-wing synchronous rotor were used. The experimental results indicated that there was a proper speed of different rotor structure for mixing process. And along with the increase of rotor speed, the maximum power, the unit consumption of energy and discharging temperature increase, while the physical and mechanical properties of mixed rubber got a better value.

scholarly journals Influence of the setting activators on the physical mechanical properties of phosphoanhydrite

2014 ◽  
Vol 20 (2) ◽  
pp. 233-240 ◽  
Author(s):  
Violeta Leskevicienė ◽  
Dalia Nizevicienė
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Spectral Analysis ◽  
Phosphoric Acid ◽  
Process Parameters ◽  
Physical And Mechanical Properties ◽  
Joint Stock Company ◽  
Stock Company ◽  
Complex Salts ◽  
Selection Of

Phosphoanhydrite was obtained by processing dihydrate phosphogypsum generated during phosphoric acid production at Joint Stock Company (JSC) Lifosa (Lithuania). The influence on the properties of phosphoanhydrite of the treament process? parameters was determined, including the conditions of phosphogypsum neutralisation in the lime suspension; temperature and duration of calcination of neutralized phosphogypsum to phosphoanhydrite; fineness of ground anhydrite; selection of additives activating the hydration of anhydrite and their amounts. Upon adding activators of anhydrite hydration, K2SO4 or Na2SO4, the data of XRD and IR spectral analysis show that the specimens after 1 day of phosphoanhydrite hydration with additives contain complex salts - syngenite upon using K2SO4 additive and glauberite in the case of Na2SO4 additive. These additives act as crystallization centers and accelerate hydration. It has been determined that the specimens of phosphoanhydrite calcined at a temperature of 900 ? C with 2 % K2SO4 additive have the best physical and mechanical properties. Already after 1 day of hardening the specimens acquired a compressive strength of 21.18 MPa, and after 28 days of hardening they had a compressive strength of 58.5 MPa (dry specimens).

scholarly journals Modification of nitrile butadiene rubber at the stage of its allocation

2018 ◽  
Vol 80 (3) ◽  
pp. 323-329
Author(s):  
V. A. Sedykh ◽  
O. V. Karmanova ◽  
E. V. Koroleva
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Mechanical Characteristics ◽  
Physical And Mechanical Properties ◽  
Butadiene Rubber ◽  
Rubber Latex ◽  
Retention Capacity ◽  
Elongation At Break ◽  
Dry Mixing ◽  
Selection Of

Search for additives that increase the wear resistance of rubbers is relevant. It is known that the introduction of hollow corundum microspheres (NCM) into rubber reduces the wear of rubber products. The uniform distribution of small amounts of microspheres in rubber by traditional "dry" mixing in a rubber mixer or on rollers is difficult. Microspheres were introduced into rubber at the stage of its separation from latex. The work consisted in the selection of thickeners capable of holding the NSM in rubber latex SCN-18SNT at the stage of its coagulation, and evaluation of physical and mechanical properties of rubbers in the presence of NCM. The retention capacity of thickeners of polyacrylamide (PAA), carboxymethylcellulose (CMC) and polyvinyl alcohol (PVA) was determined. Thickened latex was coagulated in the presence of microspheres with polymeric coagulant and sulfuric acid. When filling the polymer with microspheres, it is preferable to use a PAA thickener. The yield of microspheres in rubber using thickeners PAA, CMC and PVA was 71.1, 66.5 and 38.7% , respectively. The physico-mechanical characteristics of rubbers based on SKN-18SNT in the presence of microspheres introduced both as a "dry" method in rubber and at the stage of its isolation from latex are determined. The presence of microspheres in an amount of 4.4-4.7% by weight. on rubber, did not affect the hardness and elasticity of rebound rubbers. It has been confirmed that the presence of microspheres, especially those introduced from the latex rubber release stage, provides an increase in abrasion resistance. In turn, the presence of microspheres in rubber with traces of polyacrylamide provided an increase in the resistance of rubbers to tearing, the modulus at 100 and 200% elongation with a decrease in the elongation at break.

scholarly journals The evaluation of the effect of fracture geometry on permeability based on laboratory study and numerical modelling

2021 ◽  
Vol 36 (5) ◽  
pp. 155-164
Author(s):  
Mohammad Faez ◽  
Ahmad Ramezanzadeh ◽  
Reza Ghavami-Riabi ◽  
Behzad Tokhmechi
Keyword(s):  
Mechanical Properties ◽  
Numerical Modelling ◽  
Water Absorption ◽  
Numerical Method ◽  
Laboratory Study ◽  
Physical And Mechanical Properties ◽  
Fracture Geometry ◽  
Brittle Behavior ◽  
Geometry Of Fractures ◽  
Selection Of

The geometry of fractures includes orientation, spacing, aperture are among the parameters affecting permeability in rocks. Studying the effect of fractures geometry on the permeability in a laboratory scale requires the selection of a suitable sample in terms of physical and mechanical properties. Therefore, in this study, fibrous fiber was selected due to low water absorption and permeability as well as its non-brittle behavior and flexibility. In order to investigate the effect of fracture geometry on the permeability, 1, 2, 3, and 4 fractures with spacing greater than 50 mm, 50 mm, 25 mm, and 15 mm and with orientations of 0, 15, 30, 45, and 60 degrees to the horizon in the sample were created. The fractures did not come into contact with the surface of the sample .The results showed that the permeability raises exponentially with increasing orientation and decreasing the spacing. This situation is mostly seen in fractures with orientations larger than 30 degrees. Also, the permeability measured in the laboratory was compared with the results obtained from the numerical method of distinct elements and UDEC software. The results showed an error of about 10-15%, which is well-matched between the permeability obtained from the laboratory and the numerical method.

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