Buckling of composite structures with delaminations – laminates and functionally graded materials
Authors:
- Aleksander Muc
Abstract
In the present paper, buckling problems of constructions with single delamination are examined. Structures were made of unidirectional laminates and functionally graded materials (FGM). Two types of delaminations (closed and opened) were both investigated in experiments both in rectangular plates and axi-symmetric shells. The first part of the work is devoted to the formulation of contact problems (embedded, closed delaminations) with the aid of various functional inequalities. Then, computational models are discussed. To study the influence of the variable material configuration of FGMs, the fourth-order plate/shell relations were adopted. Finally, three particular problems examined are the buckling of flat rectangular plates, spherical shells, and compressed rectangular plates with elliptical delaminations. The experiments were conducted using imperfection sensitivity analysis and post-buckling non-linear analysis. The results demonstrate that the unsymmetric configurations of FGM structures lead to the reduction of buckling loads for structures with delaminations. For FG structures, those effects are described by the simple coefficient. Linear fracture mechanics were employed to distinguish the form of unilateral boundary problems (closed or opened). In the first case, the stable variations of the strain energy release rate GI with the delamination length variations were observed, whereas in the second case the unstable variations were observed.
- Record ID
- CUT62f0020007264502aabba3b803d64a85
- Publication categories
- ;
- Author
- Journal series
- Applied Sciences-Basel, ISSN 2076-3417, Monthly
- Issue year
- 2022
- Vol
- 12
- No
- 22
- Pages
- [1-24]
- Article number
- 11408
- Other elements of collation
- fot.; rys.; schem.; tab.; wykr.; Bibliografia (na s.) - 21-24; Bibliografia (liczba pozycji) - 78; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 12, Iss. 22
- Keywords in English
- contact (unilateral) problems, laminates, functionally graded materials, variational inequalities, buckling, delaminations, experimental results, fracture mechanics
- ASJC Classification
- ; ; ; ; ;
- DOI
- DOI:10.3390/app122211408 Opening in a new tab
- URL
- https://www.mdpi.com/2076-3417/12/22/11408 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 100
- Score source
- journalList
- Score
- Publication indicators
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT62f0020007264502aabba3b803d64a85/
- URN
urn:pkr-prod:CUT62f0020007264502aabba3b803d64a85
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.