Ensuring the functional properties of responsible structural plastic elements by means of 3-D printing

Authors

DOI:

https://doi.org/10.15587/1729-4061.2020.211752

Keywords:

3-D printing, additive processes, PEEK filament, extrusion, vacuum research, mechanical testing

Abstract

This paper addresses the issues relating to the use of 3-D printing tools in order to manufacture the structural elements of machines and apparatuses. The features of printing with the application of PLA-Carbon and PEEK (PEEK-Carbon) plastics have been analyzed. It is shown that printing that employs PEEK-plastic is accompanied by a series of problems associated with the high residual thermal stresses at cooling the material, as well as with the issue of adhesion to the laying surface, which should maintain its properties to a temperature of 420 °C. The causes of defects in the printing of articles with a significant process duration (longer than 12 hours) have been analyzed. It is shown that the most acute problem has been the interlayer grip, which predetermines the anisotropy of the properties of the finished product.

It has been proven that the use of PEEK plastic makes it possible to produce force elements by applying special print heads. Particular attention should be paid to the reliable connection between a printed element and the base (table) because the peeling and deformation of the base surface are one of the main causes of geometric defects, which subsequently predetermine the structural defects.

Mechanical tests of finished products have been performed, including vacuum and degassing research. It is established that the destruction of samples, in general, corresponds to classical ideas about the destruction of a quasi-fragile body when it comes to the phenomena occurring in the plane of the material’s layers. Thus, any form printed by a printer is an orthotropic article whose behavior is satisfactorily described by Griffiths theory. At the same time, the strength characteristics, as well as elastic properties of a product demonstrate significant axial (orthotropic) differences.

It is also shown that the functional properties of a product are ensured by the comprehensive dynamic-moving and thermobaric influence on the melt of the material in the space behind a nozzle owing to which the planes of adhesion and hollowness of the finished product are formed.

The recommendations have been formulated for preventing defects and the elimination of delamination phenomena, errors in the geometric parameters of a product; it has been concluded that it is appropriate to implement these processes into production

Author Biographies

Alexandr Salenko, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute» Peremohy ave., 37, Kyiv, Ukraine, 03056

Doctor of Technical Sciences, Professor

Department of Design of Machine Tools and Machines

Petro Melnychuk, Zhytomyr Polytechnic State University Chudnivska str., 103, Zhytomyr, Ukraine, 10005

Doctor of Technical Sciences, Professor

Department of Applied Mechanics and Computer-Integrated Technologies

Evgeny Lashko, Kremenchuk Mykhailo Ostrohradskyi National University Pershotravneva str., 20, Kremenchuk, Ukraine, 39600

PhD, Assistant

Department of Industrial Engineering

Olga Chencheva, Kremenchuk Mykhailo Ostrohradskyi National University Pershotravneva str., 20, Kremenchuk, Ukraine, 39600

PhD, Assistant

Department of Industrial Engineering

Oleksiy Titarenko, Kremenchuk Mykhailo Ostrohradskyi National University Pershotravneva str., 20, Kremenchuk, Ukraine, 39600

Postgraduate Student

Department of Industrial Engineering

Igor Derevianko, Yuzhnoye State Design Office Kryvorizka str., 3, Dnipro, Ukraine, 49008

Engineer of Laboratory

Alexandr Samusenko, Yuzhnoye State Design Office Kryvorizka str., 3, Dnipro, Ukraine, 49008

Head of Laboratory

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Published

2020-10-31

How to Cite

Salenko, A., Melnychuk, P., Lashko, E., Chencheva, O., Titarenko, O., Derevianko, I., & Samusenko, A. (2020). Ensuring the functional properties of responsible structural plastic elements by means of 3-D printing. Eastern-European Journal of Enterprise Technologies, 5(1 (107), 18–28. https://doi.org/10.15587/1729-4061.2020.211752

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Section

Engineering technological systems