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International Journal of Aerospace Engineering
Volume 2016, Article ID 7816912, 10 pages
Research Article

Sandwich Structured Composites for Aeronautics: Methods of Manufacturing Affecting Some Mechanical Properties

1Aeronautics Faculty, Polish Air Force Academy, Ulica Dywizjonu 303, No. 35, 08-521 Dęblin, Poland
2Mechanical Engineering Faculty, Lublin University of Technology, Ulica Nadbystrzycka 36, 20-618 Lublin, Poland

Received 9 February 2016; Revised 10 May 2016; Accepted 16 May 2016

Academic Editor: Linda L. Vahala

Copyright © 2016 Aneta Krzyżak et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Sandwich panels are composites which consist of two thin laminate outer skins and lightweight (e.g., honeycomb) thick core structure. Owing to the core structure, such composites are distinguished by stiffness. Despite the thickness of the core, sandwich composites are light and have a relatively high flexural strength. These composites have a spatial structure, which affects good thermal insulator properties. Sandwich panels are used in aeronautics, road vehicles, ships, and civil engineering. The mechanical properties of these composites are directly dependent on the properties of sandwich components and method of manufacturing. The paper presents some aspects of technology and its influence on mechanical properties of sandwich structure polymer composites. The sandwiches described in the paper were made by three different methods: hand lay-up, press method, and autoclave use. The samples of sandwiches were tested for failure caused by impact load. Sandwiches prepared in the same way were used for structural analysis of adhesive layer between panels and core. The results of research showed that the method of manufacturing, more precisely the pressure while forming sandwich panels, influences some mechanical properties of sandwich structured polymer composites such as flexural strength, impact strength, and compressive strength.