Formation of surface layer quality under abrasive treatment of polymer-composite materials

Introduction. The study results of the abrasive processing of parts made of polymer-composite materials are presented. The features of processing polymer composites and the technology of preforming through waterjet cutting are described. The stages of preparation of a part made of polymer-composite material for the “glueing” operation are investigated.Materials and Methods. Dependences for determining the surface roughness under waterjet cutting of polymercomposite material are considered. Research is carried out to achieve the required surface roughness under adhesive bonding of workpieces. The dependence is given that describes the roughness that is required for a reliable adhesive bond.Results. The theoretical and experimental studies of the waterjet cutting process are resulted. Their implementation technique, the tool and equipment used are described. The results of theoretical and experimental studies are compared. Their high convergence is established. The results of experimental studies on the preparation of parts made of polymercomposite materials for glueing are shown. The abrasive tools and processing modes are selected.Discussions and Conclusions. The process design procedure of abrasive treatment of workpieces from polymercomposite materials is proposed.

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Effects of cutting parameters on drilling performance of carbon black–reinforced polymer composite

Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture ◽

10.1177/0954405416662084 ◽

2016 ◽

Vol 232 (7) ◽

pp. 1133-1142 ◽

Cited By ~ 4

Author(s):

Alper Uysal

Keyword(s):

Surface Roughness ◽

Composite Materials ◽

Carbon Black ◽

Polymer Composite ◽

Experimental Studies ◽

Cutting Temperature ◽

Cutting Speed ◽

Cutting Parameters ◽

Polymer Materials ◽

Drill Point

Polymer composite materials can be produced by reinforcing carbon black, carbon fiber, graphite, graphene, metals and metal oxides, nanotubes, and so on. These types of composite materials can be employed in applications demanding electrical conductivity besides high specific strength and stiffness properties of polymer materials. In the literature, there is a lack of knowledge on the examination of drilling of particle-reinforced composite materials. In this study, drilling of pure polypropylene and carbon black–reinforced polypropylene composite material was investigated at different drill point angles, cutting speeds, and feeds. The cutting temperature of drill point and surface roughness of holes were examined. The experimental studies were designed by L27 full-factorial design, and analysis of variance statistical method was performed. According to the results, cutting temperature increased and surface roughness decreased with the increase in the cutting speed and feed and decrease in the drill point angle.

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JUSTIFICATION OF USING MULTILAYER COMPOSITE MATERIALS IN SHIPBUILDING

VESTNIK OF ASTRAKHAN STATE TECHNICAL UNIVERSITY SERIES MARINE ENGINEERING AND TECHNOLOGIES ◽

10.24143/2073-1574-2019-2-37-47 ◽

2019 ◽

pp. 37-47

Author(s):

Alsaid Mazen ◽

Ali Salamekh

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Composite Materials ◽

Polymer Composite ◽

Testing Machine ◽

Steel Structures ◽

Polymer Composite Materials ◽

Number Of Layers ◽

Study Results ◽

Glass Mat

The development of modern shipbuilding requires using new structural materials, superior to traditional ones. Polymeric composite materials are among the most promising. The article studies the mechanical properties of multilayer polymer composite materials made of glass fabrics under tension and the effect of the number of layers of glass mat on the tensile strength of the material. The technology of manufacturing samples from polymer composites reinforced with fiberglass plastic is being considered. The size and shape of the samples, the technological parameters of the manufacturing process, which depend on standard requirements, and the technological features of the testing machine are substantiated. It has been stated that fiberglass is the cheapest and most common type of composite materials, which does not require special maintenance, the cost of maintenance of fiberglass structures being significantly lower than that of steel structures. The method of testing the tensile strength of the samples has been studied. For conducting experiments, samples of glass mat brand EMC-600-1250-E were used. According to the study results, the mathematical dependence of tensile strength on the number of layers was established, and the most important stages of statistical processing of test results were laid out using the Minitab 18.1 software package. A graph of the relationship between the number of layers and tensile strength is presented. For all the examined samples the ultimate strength will depend on the number of layers. The results of mechanical properties can be used in solving problems associated with the application of polymer composite materials in shipbuilding, for example, in manufacturing superstructures of dry cargo vessels.

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Determining the influence of the filler on the properties of structural thermal-resistant polymeric materials based on Phenylone C1

Eastern-European Journal of Enterprise Technologies ◽

10.15587/1729-4061.2021.243100 ◽

2021 ◽

Vol 5 (6 (113)) ◽

pp. 24-29

Author(s):

Oleh Kabat ◽

Dmytro Makarenko ◽

Oleksii Derkach ◽

Yevhen Muranov

Keyword(s):

Thermal Properties ◽

Composite Materials ◽

Polymer Composite ◽

Silica Gel ◽

Polymer Composite Materials ◽

Mechanical And Thermal Properties ◽

Original Material ◽

Temperature Range ◽

Study Results ◽

Structural Plastics

This paper reports a laboratory study of the physical, mechanical, and thermal properties of designed composite materials based on Phenylone C1 filled with silica gel. Structural plastics, due to their high chemical and wear resistance, sufficient level of physical, mechanical, and thermal properties, can significantly improve the technical characteristics of machines and mechanisms. However, some structural plastics, including Phenylone C1, have a significant drawback – a narrow temperature range of their processing, which leads to a complication of technological equipment and increases the cost of production. It was established that the technical processing of the initial composite material into finished products could be improved by introducing fillers. The regularities of influence of silica gel content on the level of thermal and physical-mechanical properties of polymer composite materials based on Phenylone C1 have been established. It was found that the introduction of silica gel into Phenylone C1 leads to an increase in stress at the yield strength and modulus of elasticity at compression by 6.3 % and 13.3 %, respectively, compared to the original material. It was established that the heat resistance of the filled composite increases by 11.6 % with a decrease in thermal linear expansion by 10‒20 %, depending on the content of the filler. It was found that with an increase in silica gel concentration in the polymer matrix, the temperature of the onset of active destruction shifts towards higher temperatures. When filled in the amount of 30 % by weight, this temperature reaches 375 °C, which increases the temperature range of processing the designed material by 25 °C. The study results make it possible to optimize the system of tolerances and landings of parts made of polymer-composite materials, simplify the technology of their manufacture, and, as a result, reduce their cost

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Evaluation of the durability of mastic deck covering based on polymer composites in the range of operating stresses and temperatures

Journal of Physics Conference Series ◽

10.1088/1742-6596/2131/4/042047 ◽

2021 ◽

Vol 2131 (4) ◽

pp. 042047

Author(s):

E Burmistrov ◽

A Burmistrova ◽

A Tikhomirov ◽

P Bimberekov

Keyword(s):

Composite Materials ◽

Polymer Composites ◽

Polymer Composite ◽

Protective Coatings ◽

Experimental Studies ◽

Cyclic Stress ◽

Polymer Composite Materials ◽

Ship Hulls ◽

Methodological Approaches ◽

Ship Repair

Abstract The urgency of anticorrosive protection issues of ship hulls, deck structures, mechanisms, etc., as one of the main problems of the naval, is noted. One of the options for its effective solution is the use of coatings based on various polymer-composite materials. The authors substantiate the need for a preliminary assessment of the reliability and durability of such coatings, taking into account high humidity and aggressiveness of the operating environment, the corrosion of the repaired surfaces, the cyclic effect of stresses and alternating temperatures, etc. Proceeding from this, using the example of multicomponent polymer-composite compositions of the “Sprut” type, methodological approaches to the study of the polymer-composites durability for ship repair are considered. Their comparative characteristics are given. A mathematical model for assessing the durability of polymer-composite materials and coatings based on them is described, and the experimental studies’ results of their durability under static and cyclic stress in the operating temperature range are presented. The obtained results of theoretical and experimental studies are important for development of the methodological approaches to increasing the durability of mastic deck coatings based on polymer composite materials and the development of practical guidelines for the use of adhesives in shipbuilding and ship repair. The research results make it possible to develop new and improve the adopted technologies for the use of protective coatings on the structures of ship hulls and deck structures. Thus, the problems of the water transport operation, associated with the anti-corrosion protection of ship hull and deck structures and their repair, can be solved.

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