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Validity of the Reduced Bending Stiffness Method for Stacked Laminates

Schilling, Jakob C. ; Mittelstedt, C.
Altenbach, Holm ; Chinchaladze, Natalia ; Kienzler, Reinhold ; Müller, Wolfgang H. (eds.) (2020):
Validity of the Reduced Bending Stiffness Method for Stacked Laminates.
In: Advanced Structured Materials ; 134, In: Analysis of Shells, Plates, and Beams: A State of the Art Report, pp. 389-408, Cham, Springer International Publishing, ISBN 978-3-030-47491-1,
DOI: 10.1007/978-3-030-47491-1_21,
[Book Section]

Abstract

Unsymmetrical laminates are unavoidable in practical applications of composite materials. Fuselages require a smooth surface on the outside and can be typically only stiffened by attaching reinforcements on the inside. Here, the stringer feet are often stacked on top of the skin surface. In those cases, the reduced bending stiffness (RBS) method has been applied to avoid more complex computational methods for the approximation of critical buckling loads. However, the validity of the RBS method has not been evaluated for stacked laminates but for single unsymmetrical laminates only. This topic is addressed in the present work by investigating a stacked laminate consisting of two by itself symmetrical cross-ply laminates under uniaxial compression. The panel is simply supported. The effects of prebuckling deformation are neglected. The results show perfect agreement for the special case investigated; thus, the utilisation of the reduced bending stiffness method can be recommended.

Item Type: Book Section
Erschienen: 2020
Editors: Altenbach, Holm ; Chinchaladze, Natalia ; Kienzler, Reinhold ; Müller, Wolfgang H.
Creators: Schilling, Jakob C. ; Mittelstedt, C.
Title: Validity of the Reduced Bending Stiffness Method for Stacked Laminates
Language: English
Abstract:

Unsymmetrical laminates are unavoidable in practical applications of composite materials. Fuselages require a smooth surface on the outside and can be typically only stiffened by attaching reinforcements on the inside. Here, the stringer feet are often stacked on top of the skin surface. In those cases, the reduced bending stiffness (RBS) method has been applied to avoid more complex computational methods for the approximation of critical buckling loads. However, the validity of the RBS method has not been evaluated for stacked laminates but for single unsymmetrical laminates only. This topic is addressed in the present work by investigating a stacked laminate consisting of two by itself symmetrical cross-ply laminates under uniaxial compression. The panel is simply supported. The effects of prebuckling deformation are neglected. The results show perfect agreement for the special case investigated; thus, the utilisation of the reduced bending stiffness method can be recommended.

Title of Book: Analysis of Shells, Plates, and Beams: A State of the Art Report
Series Name: Advanced Structured Materials ; 134
Place of Publication: Cham
Publisher: Springer International Publishing
ISBN: 978-3-030-47491-1
Uncontrolled Keywords: Buckling, Stability, Cross-ply laminate, Extensional-bending coupling, Reduced bending stiffness, Stacked laminate
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute for Lightweight Construction and Design (KluB)
Event Location: Cham
Date Deposited: 19 Feb 2021 07:15
DOI: 10.1007/978-3-030-47491-1_21
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