scholarly journals Studying the similarities of deformation properties of leather materials in the process of creating a model of shoes

2020 ◽  
Author(s):  
Maryna Leshchyshyn Mykolaivna ◽  
Svitlana Stepanivna Garkavenko ◽  
Antonina Ivanivna Babich
Keyword(s):  
Mechanical Properties ◽  
Marketing Research ◽  
Physical And Mechanical Properties ◽  
Experimental Tests ◽  
Practical Significance ◽  
Preliminary Measurement ◽  
Parameters Selection ◽  
Wet Friction ◽  
Deformation Properties ◽  
The Individual

Determination of values and dependencies of deformation and physical and mechanical properties of materials of shoe models and finished products. According to the results of theoretical, analytical and marketing research, a number of experimental tests of materials have been carried out to prove the practical significance of the work, namely tests for: deformation of the vamp part of the product, uniaxial and biaxial stretching, bending, dry and wet friction, adhesion, elongation and tearing. There has been established the nature of the distribution of the total elongations of the samples of the vamps cut from different areas of the leather, as well as the ability of the leather material to be formed when improving the shape of the product or changing the shape of the shoetree. The processes of deformation of the vamp part of shoe blanks, physical and mechanical properties of different groups of modern materials and values analysis of similarity of their deformation properties have been studied. There has been created a working model-transformer for carrying out preliminary measurement of clients’ feet at the individual order. The expediency of these works has been proved experimentally. A working version of a model-transformer for foot measurements has been made and as a result of the works approbation, a sample of shoes has been made. The ergonomic properties of the manufactured footwear have been improved due to the use of materials with enhanced physical and mechanical properties. The article investigates the deformation of the most vulnerable vamp part of the men's model of a typical model, as well as the physical and mechanical characteristics of leather materials for manufacturing models and shoes of this type. Providing high quality and comfort of footwear, accuracy of parameters selection of foot measurement, zones of beams and achievement of form stability of footwear with a top from genuine leathers has been predicted.

scholarly journals The influence of liquid rubber on selected properties of rubber compound and its vulcanizates

2021 ◽  
Vol 1199 (1) ◽  
pp. 012038
Author(s):  
S Brigantová ◽  
M Pajtášová ◽  
R Janík ◽  
D Ondrušová ◽  
S Ďurišová
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Experimental Tests ◽  
Rubber Compound ◽  
Liquid Form ◽  
Liquid Rubber ◽  
Curing Characteristics ◽  
The Individual ◽  
Butadiene Styrene ◽  
General Conditions

Abstract The aim of the work was to determine the influence of liquid rubber on selected properties of rubber compound and its vulcanizates. Due to the liquid form of this rubber, it is not possible to completely replace the conventional solid rubber used in the mixture because of problems in further processing. In four experimental tests, we used different amounts of liquid rubber in the recipe together with butadiene-styrene rubber and the compounds we mixed according to the general conditions. We studied the curing characteristics of prepared mixture and we measuremend physical and mechanical properties of study vulcanizates and summarized the individual measured values for each parameter and suggested the greatest importance of the recipe for rubber practice.

The Study of Creep and Deformation Properties of Sulfur-Containing Arbolit Exposed to Various Compression Stresses

2021 ◽  
Vol 899 ◽  
pp. 137-143
Author(s):  
Yulia A. Sokolova ◽  
Marina A. Akulova ◽  
Baizak R. Isakulov ◽  
Alla G. Sokolova ◽  
Berikbay B. Kul’sharov ◽  
...  
Keyword(s):  
Stress Level ◽  
Creep Deformation ◽  
Building Materials ◽  
Physical And Mechanical Properties ◽  
High Strength ◽  
Experimental Tests ◽  
Theory And Practice ◽  
Wall Material ◽  
Deformation Properties ◽  
Sulfur Containing

The present paper considers the study of creep and deformation properties of sulfur-containing arbolit exposed to various compression stresses. Investigating the creep of lightweight arbolit concretes greatly affecting the performance of bearing and envelope structures draws a special attention during the last years. This issue is of particular relevance in the regions with hot and sharp continental climate. Arbolit concrete is one of the lightest building materials with low thermal conductivity and good soundproof properties. The modern postulates of theory and practice of creation, development of high-strength arbolit concretes on the base of composite sulfur-containing binders have become the methodological framework of the present research. While carrying out scientific research, the following standard measuring and analysis methods of physical and mechanical properties have been used for sulfur-containing arbolit composites. Experimental tests have been implemented on the 28-days samples made of sulfur-containing arbolit, with the cotton plant footstalks as an organic component. The researched samples were vapor sealed with the purpose to eliminate overlapping the processes of contraction and creep. The experimental results have shown that the analysis of prisms deformation in time demonstrates certain derivation from the pattern. Deformation of prisms made of sulfur-containing arbolit loaded at the low stress level were growing at a slower rate that the same deformations at a higher stress level. No derivation has been observed for the prisms of sulfur-containing haydite concrete. For both types of concrete, creep deformation has reached the values exceeding completely recoverable deformation by a factor of 2 or all the samples, the rapid growth of creep deformation has been observed after loading, followed by the gradual slowdown of deformation growth. For sulfur-containing lightweight concretes, as the test shown, the rate of creep deformation growth depends on the hardening curve in time reflecting the process of concrete hardening. This, if compared with sulfur-containing lightweight concretes, creep of sulfur-containing arbolit concrete is significantly lower that eventually leads to the loss of creep deformation at the same stress level. The obtained results can be used when manufacturing an efficient wall material for residential construction, including seismic areas.

MODELING THE STRESS STATE OF THE BACKFILLING MASS WITH DIFFERENT PHYSICAL AND MECHANICAL PROPERTIES

2021 ◽  
pp. 7-18
Author(s):  
Mykhailo Petlovanyi ◽  
◽  
Kateryna Sai ◽  
Keyword(s):  
Mechanical Properties ◽  
Numerical Modeling ◽  
Stress State ◽  
Physical And Mechanical Properties ◽  
Practical Significance ◽  
Mining Operations ◽  
Mining Depth ◽  
Compressive Stresses ◽  
A Value ◽  
Backfilled Stopes

Purpose. Analytical researches of the stress state of the backfilling stopes with different physical and mechanical properties using numerical modeling to determine possible zones of stability losses and predict their failure. Methods. Numerical modeling of the formation of stresses around a high stopes was carried out for the conditions of mining iron ore reserves in the depth intervals of 740-1040 m of the Pivdenno-Bilozerske deposit, where mining operations are actively carried out using the finite element method in the SolidWorks 2016 software package with reliable substantiation of the parameters of the developed geomechanical model. Results. Numerical simulation of the stress state of the backfilling mass are carried out at variable values of the modulus of its elasticity and the mining depth. It was found that with the existing actual physical and mechanical properties of the backfilling mass during the development of the Pivdenno-Bilozerske deposit, the danger of its failure is predicted at depths of more than 890 m. In the center of the filling array, the stress values change linearly, and at the junction of the roof with the side of the backfilled stopes – polynomial. It was found that an increase in the modulus of elasticity of the backfilling mass allows to reduce the compressive stresses only at the junction of the roof with the side of the backfilled stopes to a value of 800 MPa. Scientific novelty. With an increase in the depth of development, despite an increase in the elastic modulus of the fill, the values of stresses increase, which eliminates the need to increase it with a decrease in the mining depth it was found. Practical significance. The results obtained make it possible to correct the technology of formation of a backfilling mass in the primary stopes, taking into account the formation of stresses on its contour and, with an increase in the mining depth, to form a backfilling mass with viscoplastic properties.

Study on Physical and Mechanical Characteristics of Q2 Loess and Micro-Structure Properties in Li-Shan

2014 ◽  
Vol 1065-1069 ◽  
pp. 1846-1849 ◽  
Author(s):  
Ying Wang ◽  
Pan Pan Yang
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Practical Significance ◽  
Basic Unit ◽  
Micro Structure ◽  
Basic Characteristics ◽  
Microscopy Techniques ◽  
Xi’An City ◽  
Scanning Electron ◽  
Physical And Mechanical Characteristics

The physical and mechanical properties and microstructure of Q2loess are of great theoretical and practical significance. Through studying these properties which Q2loess samples are taken in the Xi'an city of Lin-tong District of Mount Li, the results show that: (1)Natural water content, wet density, liquid and solid index, shear strength, collapsible coefficient compressive modulus; (2)By means of the scanning electron microscope to study the picture of the loess micro-structure, there are some preliminary understanding of micro-structure’s basic characteristics; (3)Using scanning electron microscopy techniques to observe the loess micro-structure, As the performance of the loess micro-structure’s basic unit-body and its arrangement form, the loess micro-structure is the reflection of its physical and mechanical properties, Meanwhile the change of physical and mechanical properties also show the unstability of the loess micro-structure.

scholarly journals Quartz Reinforced Unsaturated Polyester Resin Composites: Preparation and Characterization

2021 ◽  
pp. 14-25
Author(s):  
Sujan Kanti Das ◽  
Mithun Rani Nath ◽  
Rajib Chandra Das ◽  
Manas Mondal ◽  
Snahasis Bhowmik
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Polyester Resin ◽  
Adhesion Force ◽  
Unsaturated Polyester ◽  
Physical And Mechanical Properties ◽  
Thermal Characterization ◽  
Unsaturated Polyester Resin ◽  
Quartz Content ◽  
The Individual

Compression molding has produced quartz-reinforced polyester composites (QPCs) weighing 10 to 40 per cent quartz relative to the weight of unsaturated polyester resin. Synergistic changes were made in the composite properties and were superior to those of the individual components. The composite's physical and  mechanical properties such as bulk density, water absorption , tensile strength, flexural strength, hardness have illustrated the competency of the composite being developed. It was found that for the resultant composite examined, the percentage of water absorption is very small. However, when quartz content were increased, water absorption grew very slowly. Enhancement of mechanical properties strongly corresponds to strong adhesion force of quartz with the matrix and it influenced by well-disperse quartz particles on the whole surface of composite. This paper also performed thermal characterization of the composites. Because of these remarkable properties, as prepared composite can find applications in packaging, fuel cell, solar cell, structural materials and households purposes.

scholarly journals INVESTIGATION OF IMPACT OF CROSSLINKING AGENTS ON CHARACTERISTICS OF SPATIAL NET AND PROPERTIES OF STYRENE-ACRYLIC POLYMER FILMS

2018 ◽  
Vol 61 (7) ◽  
pp. 68
Author(s):  
Inna Slepchuk ◽  
Olga Ya. Semeshko ◽  
Tatiana S. Asaulyuk ◽  
Yuliya G. Saribekova
Keyword(s):  
Mechanical Properties ◽  
Polymer Film ◽  
Polymer Films ◽  
Crosslinking Agent ◽  
Hydrolytic Degradation ◽  
Physical And Mechanical Properties ◽  
Acrylic Polymer ◽  
The Individual ◽  
High Degree ◽  
Crosslinking Agents

The influence of crosslinking agents on the characteristics and properties of films from aqueous dispersions of styrene-acrylic polymers Lacritex 309, 430 and 640 was studied in order to obtain coatings on textile materials. Mono-, di- and triglycidyl esters are chosen as crosslinking agents. The choice of aqueous dispersions of polymers and crosslinkers is due to strict environmental requirements for textile products. By determining the amount of aceton-insoluble fractions of the formed polymer films, it was determined that the incorporation of crosslinkers is required in the Lacritex dispersion 640, and the films based on Lacritex 430 and 309 are distinguished by a high degree of intermolecular crosslinking. Optimum concentrations of crosslinkers have been established, which provide a high degree of curing of Lacritex 640. Using the sol-gel method, the structural parameters of the spatial nets of styrene-acrylic polymers (the part of sol fraction, the degree of crosslinking, the part of active chains, the average molecular weight of the chain segment, the crosslink density) were calculated. The polymer films from the individual polymer Lacritex 430 have the highest indexes of physic mechanical characteristics. Lacritex 640/Laproxide 703 compositions can be used as polymer matrixes for textile materials. The formation of crosslinks of hydroxyl and carboxyl groups of the styrene-acrylic polymer with epoxy groups of the crosslinking agent was confirmed by IR spectroscopy. The investigation of the effect of water and soap-soda treatments at various temperatures shows that the films under study have high resistance to water and soap-soda solution. The results of investigation of the tensile strength, the elongation at break, the hardness of the coating surface by the Koenig method and the stickiness according to the FINAT method (Test Method Number 9) of the formed polymer films indicate high physical and mechanical properties such as increased mechanical strength and elasticity, reduced hardness and tackiness. Thus, based on the studies carried out, it can be concluded that the individual styrene-acrylic Lacritex polymers 309 and 430 provide the formation of a strong three-dimensional spatial structure of the polymer film and can be used without crosslinking agents. The use of Lacritex 640 is possible in the composition together with the Laproxide 703 crosslinking agent at an optimum concentration of 4%. A polymer film based on this composition has a high degree of crosslinking, and as a result, increased resistance to organic solvents, reduced hydrolytic degradation at high temperatures, and increased physico-mechanical properties. A polymer film based on this composition has a high degree of crosslinking, hence, has increased resistance to organic solvents, reduced hydrolytic degradation at high temperatures, and increased physical and mechanical properties. Forcitation:Slepchuk I., Semeshko O.Ya., Asaulyuk T.S., Saribekova Yu.G. Investigation of impact of rosslinking agents on characteristics of spatial net and properties of styrene-acrylic polymer films. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 7. P. 67-75

scholarly journals Using TeX Markup Language for 3D and 2D Geological Plotting

2021 ◽  
Vol 46 (1) ◽  
pp. 43-69
Author(s):  
Vasiliy Lemenkov ◽  
Polina Lemenkova
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Experimental Tests ◽  
Markup Language ◽  
Technical Application ◽  
Graphical Visualization ◽  
Compressibility Coefficient ◽  
High Level ◽  
2D And 3D ◽  
Logical Data

Abstract The paper presents technical application of TeX high-level, descriptive markup language for processing geological dataset from soil laboratory. Geotechnical measurements included equivalent soil cohesion, absolute and absolute deformation index, soil compressibility coefficient by time of immersion depth, exposure time to compressive strength to samples and physical and mechanical properties (humidity, density). Dataset was received from laboratory based experimental tests of the physical and mechanical properties of soils. Data were converted to csv table and processed by LaTeX. Methodology is based on LaTeX packages: {tikz}, {tikz-3dplot}, {tikzpicture}, {pgfplot}, {filecontetns}, {spy} for 3D plotting showing correlation in variables and descriptive statistical analysis based on the data array processing. Results demonstrated LaTeX scripts and graphics: 2D and 3D scatterplots, ternaries, bar charts, boxplots, zooming techniques detailing fragment of the plot, flowchart. Research novelty consists in technical approach of TeX language application for geo- logical data processing and graphical visualization. Engineering graphics by TeX was demonstrated with screenshots of the codes used for plotting.

Effect of Organoclays on Fire Resistance of Siloxane Rubbers

2018 ◽  
Vol 284 ◽  
pp. 25-29 ◽  
Author(s):  
R.N. Gadelshin ◽  
P.V. Ponomarev ◽  
A.R. Kurbangaleeva ◽  
Svetoslav Isaakovich Volfson ◽  
Yu.N. Khakimullin
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Fire Resistance ◽  
Aluminium Hydroxide ◽  
Technological Progress ◽  
Fire Retardant ◽  
Physical And Mechanical Properties ◽  
Practical Significance ◽  
Scientific Interest ◽  
Wide Range

The technological progress constantly raises standards for items operated in rough conditions in order to improve their reliability in a wide range of operating temperatures, fire resistance and sustainability. Researches aimed at discovering flame retardant agents that would help to develop siloxane rubbers with increased fire-resistance are of great scientific interest and have a practical significance. We have studied the effect of aluminium hydroxide on the physical and mechanical properties and fire-resistance of siloxane rubbers. The study has shown that the aluminium hydroxide acts as an effective fire retardant at its content in the rubber over 40 % (wt.), however, it significantly decreases the physical and mechanical properties of the siloxane rubbers and causes difficulties in processing of the rubber mix. The research has shown that the additional introduction of organoclays (5 pts. wt.) improves the fire-resistance of such rubbers, the most effective being montmorillonites modified with alkylbenzyldimethylammonium chloride.

scholarly journals Analysis of selected properties of warming system prepared with various plastering mortar

2018 ◽  
Vol 196 ◽  
pp. 04044
Author(s):  
Wioletta Godlewska ◽  
Artur Koper
Keyword(s):  
Mechanical Properties ◽  
Sustainable Development ◽  
Thin Layer ◽  
Physical And Mechanical Properties ◽  
Insulation System ◽  
Additional Layer ◽  
Design Build ◽  
Important Challenge ◽  
The Individual ◽  
Is Design

Nowadays, one of the most important challenge in civil construction is design, build and use buildings in sustainable development way. This article describes one of the most important thermo-modernization undertaking, which is increase of insulation of external walls. The research was prepared in special technology on samples with silicon, mineral, acrylic thin-layer plasters and with adhesive mass only. Purpose of the research was to analyze the physical and mechanical properties of the additional layer with this four variants of plastering mortar. The research, which was made by authors showed that the thin – layer plasters are characterized by resistance to environmental factors, which they are directly exposed. The connection between the individual layers of the thermal insulation system secures durability of the plasters. The samples with mineral plastering mortar were characterized by the highest interlayer adhesion

Intercalated Two-Dimensional Ceramic Nanocomposites

1992 ◽  
Vol 267 ◽  
Author(s):  
E.P. Giannelis ◽  
V. Mehrotra ◽  
O. Tse ◽  
R.A. Vaia ◽  
T.-C. Sung
Keyword(s):  
Mechanical Properties ◽  
Polymer Matrix ◽  
Physical And Mechanical Properties ◽  
Two Dimensional ◽  
Molecular Dispersion ◽  
The Individual ◽  
Synthetic Approaches ◽  
Intercalative Polymerization ◽  
Ceramic Nanocomposites

ABSTRACTNew generations of polymer-ceramic nanocomposites are being developed by intercalation of layered solids. Synthetic approaches include intercalative polymerization, direct polymer intercalation and molecular dispersion of the host layers in the polymer matrix. The unique physical and mechanical properties of the hybrids are attributed to the molecular dispersion and the synergism between the individual components.

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