Pressing of porous bodies made of MR wire material

Abstract

The paper presents a solution to the problem of determining the basic equation for pressing of porous bodies made of MR material that  relates not only the molding pressure to the MR density, but also other physical parameters, including the technological parameters of blank formation. The paper outlines the basic assumptions of the theory of compression molding of items made of MR fibrous material. It has been proved that the ideal process of pressing porous bodies contains two stages for a range of relative densities [0,15; 0,7]. The basic equation of pressing of MR products was determined. It was proved that the equations of ideal pressing (in the absence of external friction forces) have the form of power-law dependences of the molding pressure on the density of the porous body. The power function of hardening of the wire material in the press was obtained. An experimental test of the hypotheses put forward and the assumptions made was carried out, which showed their validity. The obtained theory of axisymmetric pressing of fiber bodies and the obtained basic equation for pressing the MR material can be extended to various types of pressing modes and product shapes. The results of the performed theoretical and experimental studies, as well as their generalization, can serve as a basis for studying mass molding of porous bodies made of fiber materials, taking into account the uneven distribution of density over the volume.

About the authors

A. I. Ermakov

Samara National Research University

Author for correspondence.
Email: ermakov_fdla@mail.ru

Doctor of Science (Engineering), Professor of the Department of Aircraft Engine Construction and Design, Scientific Director of ONIL-1

Russian Federation

D. P. Davydov

Samara National Research University

Email: dpdavydov@yandex.ru

Candidate of Science (Engineering), Assistant Professor of the Department of Aircraft Engine Construction and Design, Senior Researcher of ONIL-1

Russian Federation

V. I. Shchemelev

Samara National Research University

Email: vadimmenn@rambler.ru

Postgraduate Student of the Department of Aircraft Engine Construction and Design, Design Engineer of ONIL-1

Russian Federation

G. V. Lazutkin

Samara National Research University

Email: lazutkin.gennadij@mail.ru

Doctor of Science (Engineering), Leading Researcher of ONIL-1

Russian Federation

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