On the use of highly porous aluminum alloys and cellular structures in the spacecraft landing devices

Article

Published: 17.11.2022

Authors: Markov V.A., Popov Yu.V., Pusev V.I., Selivanov V.V.

Published in issue: #11(131)/2022

DOI: 10.18698/2308-6033-2022-11-2228

Category: Aviation and Rocket-Space Engineering | Chapter: Design, construction and production of aircraft

The paper presents results of studying mechanical properties and shock-absorbing characteristics of the highly porous aluminum alloys and aluminum alloy cellular structures with the initial average density from 190 to 2250 kg/m3. The study is based on data from foreign publications and experimental results obtained by the authors. Diagrams of deformation are provided illustrating characteristic stages of the deformation process and compaction of the highly porous alloys and cellular structures made of the aluminum alloys. Highly porous alloys are identified, which deformation is close to the idealized. Based on the analysis of experimental data, presence of two groups of materials is shown: the first with deformation diagram without hardening at the compaction stage and the second with hardening. Basics for calculating specific and effective impact absorption energy are provided. Analogue shock absorbers are shown for characteristic stages of the deformation diagrams. Introduction of the effective impact absorption energy is proposed as a criterion to compare the shock absorbers with each other. The results obtained could be used in the development of the single shock absorbers.

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