scholarly journals COMPLEX GEOMETRIC EVALUATION OF POLYMER MATERIALS QUALITY

2021 ◽  
pp. 90-93
Author(s):  
E. V. Derbisher ◽  
I. V. Germashev ◽  
O. V. Kolyaganova ◽  
R. A. Evdokimov ◽  
V. E. Derbisher
Keyword(s):  
Mechanical Properties ◽  
Polymer Material ◽  
Comparative Evaluation ◽  
Physical And Mechanical Properties ◽  
Polymer Materials ◽  
Computational Technique ◽  
Mechanical Parameters ◽  
Geometric Criterion ◽  
Industrial Impact ◽  
Homogeneous Set

A computational technique of comparative evaluation of polymer material quality in a homogeneous set of samples according to a complex geometric criterion is proposed. Samples of physical and mechanical parameters of samples of industrial impact-resistant polystyrene are used for calculation. The most averaged complex of physical and mechanical properties is used as the calculation base.

scholarly journals Comparison of physical and mechanical properties of mining waste with a grain size up to 2 mm reinforced with cement CEM I and CEM III

2019 ◽  
Vol 106 ◽  
pp. 01023
Author(s):  
Justyna Morman-Wątor
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Fine Particles ◽  
Physical And Mechanical Properties ◽  
Mining Waste ◽  
Soil Testing ◽  
Mechanical Parameters ◽  
Freeze Resistance

The article presents the results of tests for mining waste mixtures - cement. The addition of cement was aimed at limiting the leaching of fine particles and improving physical and mechanical parameters. The studies used cement CEM I 42.5 R and CEM III/ A 42.5N - LH / HSR / NA and plasticizing sealant. The paper presents the results of freeze resistance, swelling tests, pH of water leachate and oedometer soil testing.

Improvement of PA6 Mechanical Properties by Radiation Cross-Linking

2015 ◽  
Vol 1120-1121 ◽  
pp. 1163-1166 ◽  
Author(s):  
Petr Kratky ◽  
David Manas ◽  
Miroslav Manas ◽  
Michal Stanek ◽  
Martin Ovsik ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Layer ◽  
Polymer Material ◽  
Polyamide 6 ◽  
Polymer Materials ◽  
Cross Linking ◽  
Depth Sensing ◽  
Surface Layers ◽  
Hard Surface ◽  
End Use

Influence of mechanical properties of the hard surface layer of modified polyamide 6 is studied. Mechanical properties are acquired by nanohardness test with using the DSI method (Depth Sensing Indentation). Hard surface layers are created by radiation cross-linking technology. This technology allows polymer materials modification followed by the change of their end-use properties. The surface layer of polymer material is modified by ionizing β - radiation. When the polymer material is exposed to the β radiation, it is possible to observe changes of the surface layer at applied load. Radiation cross-linking usually improves strength, reduces creep, contributes to chemical resistance improvement, and in many cases improves tribological properties.

Comparative Evaluation of Chemical Treatment on the Physical and Mechanical Properties of Areca Frond, Banana, and Flax Fibers

2020 ◽  
pp. 1-13 ◽  
Author(s):  
Srinivas Shenoy Heckadka ◽  
Suhas Yeshwant Nayak ◽  
Thomas Joe ◽  
Jacob Zachariah N ◽  
Sonia Gupta ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chemical Treatment ◽  
Comparative Evaluation ◽  
Physical And Mechanical Properties ◽  
Flax Fibers

Research on Preparation and Property of Alternating Multilayer Polymer Electromagnetic Shielding Materials

2013 ◽  
Vol 443 ◽  
pp. 634-638 ◽  
Author(s):  
Lei Zhang
Keyword(s):  
Mechanical Properties ◽  
Visible Light ◽  
Heat Resistance ◽  
Polymer Material ◽  
Electromagnetic Shielding ◽  
Polymer Materials ◽  
Pass Rate ◽  
Shielding Effect ◽  
High Yield ◽  
Metal Mesh

With the development of materials science and technology, performance and preparation of polymer materials becomes a hot topic. The heat resistance and corrosion resistance of Polymer material are strong and can be manufacture for composite materials. It is widely used in many areas. This paper adds metal shielding materials into polymer materials and uses layered coating technology. This paper treats metal mesh and PET film composite structure as in the electromagnetic shielding layer and prepares the alternating multilayer polymer electromagnetic shielding materials. This paper tests electronic shielding effect of the material. It mainly detects the shielding effect of pass rate, the decay rate, and the electromagnetic intensity of visible light. The result shows that the permeation rate of the materials for visible light is about 40%, and the attenuation effect is 85db. Multilayered metal shielding mesh shields 60% magnetic field strength and obtains good electromagnetic shielding effects. This paper tests the mechanical properties of the material through the polarizing microscope which proves that alternating multilayer polymer material has good continuity mechanical properties and high yield strength and heat resistance. It provides theoretical support for the development of the new type of electromagnetic shielding materials.

Effect of Cement Content and Curing Period on Properties of DUT-1 Synthetic Model Ice

2003 ◽  
Vol 125 (4) ◽  
pp. 288-292 ◽  
Author(s):  
Zhijun Li ◽  
Yongxue Wang ◽  
Xiwen Wang ◽  
Guangwei Li
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Elastic Modulus ◽  
Cement Content ◽  
Physical And Mechanical Properties ◽  
Dry Weight ◽  
Mechanical Parameters ◽  
Synthetic Model ◽  
Curing Period ◽  
Maximum Value

The effects of cement content and curing period on a new synthetic model ice, DUT-1, are reported. The cement (450#) contents were 10%, 11%, 12%, 13%, 14%, 15% and 16% by dry weight of mixture material. Eight different curing periods were used: 66 h, 92 h, 115 h, 139 h, 163 h, 186 h, 211 h and 235 h. Physical and mechanical properties, such as density, compressive strength, flexural strength, and elastic modulus, were determined. The density and mechanical parameters were found to increase with increasing cement content, whereas the durations of curing period under normal air temperature resulted in increasing these properties to a maximum value, then decreasing values.

scholarly journals DETERMINATION OF PHYSICAL-MECHANICAL PARAMETERS OF WALNUTS

2019 ◽  
pp. 12-17
Author(s):  
Yurii Polievoda ◽  
Igor Tverdokhlib
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Walnut Shell ◽  
Mechanical Parameters ◽  
Peeling Process ◽  
Energy Indices

The information about growing and processing of walnut in Europe and Ukraine is given. The actuality of the implementation of peeling, maximally preserved nuts is established. Based on the conducted research, the physical and mechanical properties of walnut shell are determined. The rational energy indices of the peeling process are found at maximum preservation of the fetus. The use of the developed equipment for preliminary peeling of the walnut in order to get microcracks is proposed.

scholarly journals The Effects of Different Nanoadditives on the Physical and Mechanical Properties of Similar Silty Mudstone Materials

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Ji-jing Wang ◽  
Zhen-ning Shi ◽  
Ling Zeng ◽  
Shuang-xing Qi
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Water Absorption ◽  
Natural Water ◽  
Physical And Mechanical Properties ◽  
Mechanical Parameters ◽  
Similar Material ◽  
Silty Mudstone ◽  
Similar Materials ◽  
Softening Coefficient

In order to analyze the influence of different nanoadditives on the physical and mechanical properties of similar silty mudstone materials, nano-TiO2 (NTi), nano Al2O3 (NAl), and nanobentonite (NBe) were added to improve the physical and mechanical properties of silty mudstone similar materials. The physical and mechanical parameters are more in line with silty rock. Finally, nanometer additives suitable for silty mudstone similar materials are determined by conducting density test, natural water absorption test, uniaxial compression test, splitting test, softening coefficient test, expansibility test, and microscopic test. The effects of adding NTi, NAl, and NBe on improving the physical and mechanical properties of silty mudstone similar materials were studied to analyze the influence law of different NTi, NAl, and NBe contents on similar material density, natural water absorption, uniaxial compressive strength, tensile strength, softening coefficient, expansion rate, and other physical and mechanical parameters. The microscopic morphology of similar materials was analyzed by scanning electron microscopy and the mechanism of influence of nanoadditives on the microscopic structure of samples was revealed. The results are as follows. (1) The density of similar materials of silty mudstone increases with the increase of the content of nanoadditive. The natural water absorption rate decreased first and then increased with the increase of the content of nanometer additives, while the softening coefficient decreased with the increase of the content of nanometer additives. The uniaxial compressive strength and tensile strength increased first and then decreased with the increase of the content of nanometer additives. This is due to the incorporation of the nanoadditive amount effective to promote the hydration reaction of gypsum and accelerate the production of cement, while a similar material may be filled in the pores, reducing the internal defects, a similar material to make denser; when excessive dosage, nanoadditives agglomeration occurs, resulting in deterioration of the effect, but will reduce the mechanical properties of similar materials. (2) When the content of NBe is 6%, the physical and mechanical parameters of similar materials can reach or be closer to the silty raw rock except uniaxial compressive strength. The failure mode of the uniaxial compression specimen is also the same as that of the original rock, which can be used as the best choice. The research results laid the foundation for further analysis of NBe application in similar materials.

Present Status and Key Challenges of Carbon Nanotubes Reinforced Polyolefins: A Review on Nanocomposites Manufacturing and Performance Issues

2009 ◽  
Vol 17 (4) ◽  
pp. 205-245 ◽  
Author(s):  
K. Prashantha ◽  
J. Soulestin ◽  
M.F. Lacrampe ◽  
P. Krawczak
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Physical And Mechanical Properties ◽  
Emerging Technology ◽  
Polymer Materials ◽  
Scientific Principles ◽  
End Use ◽  
And Performance ◽  
Commercial Applications ◽  
Comprehensive Discussion

Carbon nanotube reinforcement is a key emerging technology to simultaneously impart enhanced mechanical properties while adding multifunctional characteristics to polymer materials and systems. The promise of extraordinary improvement in-end use properties of polyolefin/carbon nanotube hybrid systems has spurred great interest and intensive activity in academics and industries. This review offers a comprehensive discussion of the preparation, compounding, properties and applications of such nanocomposites. The processing, dispersion and orientation of nanotubes, as well as the characterisation of physical and mechanical properties of carbon nanotube filled polyolefins are discussed. In particular the scientific principles and mechanisms in relation to the methods of manufacturing are highlighted, with an outlook towards commercial applications.

MODERN TECHNOLOGIES FOR THE RESTORATION OF MACHINE PARTS

2021 ◽  
Vol 1 (142) ◽  
pp. 154-161
Author(s):  
Alexander Kostyukov ◽  
Keyword(s):  
Mechanical Properties ◽  
Adhesive Strength ◽  
Physical And Mechanical Properties ◽  
Main Property ◽  
Polymer Coatings ◽  
Polymer Materials ◽  
Research Purpose ◽  
Properties Of Coatings ◽  
Machine Parts ◽  
Metal Polymer

At repair enterprises, various metal-polymer materials are used to restore the interfaces. Metal-polymer materials can be filled with the following components: steel, bronze, aluminum, titanium. The main advantages of metal polymers are their resistance to negative environmental influences, mechanical friction and high temperatures. (Research purpose) The research purpose is in analyzing the possibilities of metal-polymer materials for effective use in the restoration of machine parts and to give suggestions for improving their physical and mechanical properties during the restoration work. (Materials and methods) Authors studied metal-polymer materials of well-known companies: "Belzona" (USA), "Durmetal" (Switzerland), "Diamant" (Germany), "Loctite" (USA), Chester Molecular (Poland). The article presents the data on their use in the restoration of various parts. The metal polymer materials of foreign companies are characterized by stable quality and high physical and technical characteristics; domestic materials are still inferior to imported ones due to the low quality of the incoming components. (Results and discussion) The main property of coatings is the adhesive strength, which largely determines the resource of the restored part. The main factors that affect the adhesive strength are described in the article. It is possible to significantly increase the adhesive strength of the coatings due to the preliminary electric spark treatment of the worn part. The article presents data on the effectiveness of electric spark coatings as an independent technological process in the restoration of the part. The use of a combined technology of electric spark processing with subsequent application of metal-polymer materials provides undeniable advantages in the restoration of parts. (Conclusions) To improve the physical and mechanical properties of coatings, it is advisable to combine the technology of electric spark processing with the use of metal-polymer coatings. This will expand the possibilities of using part recovery technologies.

scholarly journals A Model for In-Plane Capacity of Multi-Leaf Stone Masonry Walls

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Jagat Kumar Shrestha ◽  
Sujit Bhandari
Keyword(s):  
Mechanical Properties ◽  
Mathematical Model ◽  
Physical And Mechanical Properties ◽  
Masonry Wall ◽  
Stone Masonry ◽  
Masonry Walls ◽  
Mechanical Parameters ◽  
The World ◽  
Pushover Curve ◽  
New Construction

Masonry walls with distinct layers, known as multi-leaf masonry walls, are prevalent in many regions of the world including ancient architecture in Europe and new construction in the Himalayan region of South Asia. This paper presents a model for determining the capacity of multi-leaf stone masonry wall from its physical and mechanical parameters. For the study, a “Standard Wall” with typical properties of a multi-leaf stone masonry wall is defined and the capacity of the stone masonry wall is studied varying different physical and mechanical parameters of the wall to explore an analytical model that can represent the capacity of multi-leaf stone masonry. 300 models of multi-leaf stone masonry panels are analysed in ANSYS, and the capacity and displacement parameters are extracted by bilinearization of the pushover curve. As a result, a mathematical model between the capacity of a multi-leaf stone masonry wall and physical and mechanical properties is established.

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