On the bending and transverse shearing behaviour of curved sandwich panels

Martin Hildebrand

Research output: Book/ReportReportProfessional

Abstract

The advantages of sandwich constructions have been known for a long time. In the small-craft industry, the sandwich principle has been used for many years. It has been the favoured solution mainly for boat decks. However, sandwich construction is nowadays gaining more popularity also in hulls. There are major differences between the behaviour of sandwich and single-skin structures. As a consequence, the design of sandwich structures requires some additional considerations. Curved panels are typical of small-craft hulls. Apart from in-plane loads due to the global bending of the hull, they are loaded by hydrostatic pressure and wave-induced slamming pressure. The influence of the curvature of sandwich panels on the bending behaviour, face strain and the transverse shear strain distributions has been examined using the nonlinear finite-element methods. The behaviour has been analysed under two different load types, a constant pressure distribution and a slamming pressure distribution, which is typical of boat hulls. Different types of bending responses have been found depending on the curvature of the sandwich panels. The results show that it is necessary to perform a geometric nonlinear analysis in order to get reliable results. For panels with higher curvature, transverse shear strains decrease by 50-90 % as compared to flat plates.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages24
ISBN (Print)951-38-3881-1
Publication statusPublished - 1991
MoE publication typeNot Eligible

Publication series

NameTiedotteita / Valtion teknillinen tutkimuskeskus
PublisherVTT
No.1249
ISSN (Print)0358-5085

Fingerprint

Shear strain
Boats
Shearing
Pressure distribution
Slamming (ships)
Bending (deformation)
Sandwich structures
Nonlinear analysis
Hydrostatic pressure
Skin
Finite element method
Industry

Keywords

  • sandwich panels
  • sandwich structures
  • design
  • hulls (structures)
  • boats
  • ships
  • stress analysis
  • bending
  • bend properties
  • shear properties
  • shear stress
  • curvature
  • curved profiles
  • loads (forces)
  • structural analysis

Cite this

Hildebrand, M. (1991). On the bending and transverse shearing behaviour of curved sandwich panels. Espoo: VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tiedotteita, No. 1249
Hildebrand, Martin. / On the bending and transverse shearing behaviour of curved sandwich panels. Espoo : VTT Technical Research Centre of Finland, 1991. 24 p. (Valtion teknillinen tutkimuskeskus. Tiedotteita; No. 1249).
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Hildebrand, M 1991, On the bending and transverse shearing behaviour of curved sandwich panels. Valtion teknillinen tutkimuskeskus. Tiedotteita, no. 1249, VTT Technical Research Centre of Finland, Espoo.

On the bending and transverse shearing behaviour of curved sandwich panels. / Hildebrand, Martin.

Espoo : VTT Technical Research Centre of Finland, 1991. 24 p. (Valtion teknillinen tutkimuskeskus. Tiedotteita; No. 1249).

Research output: Book/ReportReportProfessional

TY - BOOK

T1 - On the bending and transverse shearing behaviour of curved sandwich panels

AU - Hildebrand, Martin

PY - 1991

Y1 - 1991

N2 - The advantages of sandwich constructions have been known for a long time. In the small-craft industry, the sandwich principle has been used for many years. It has been the favoured solution mainly for boat decks. However, sandwich construction is nowadays gaining more popularity also in hulls. There are major differences between the behaviour of sandwich and single-skin structures. As a consequence, the design of sandwich structures requires some additional considerations. Curved panels are typical of small-craft hulls. Apart from in-plane loads due to the global bending of the hull, they are loaded by hydrostatic pressure and wave-induced slamming pressure. The influence of the curvature of sandwich panels on the bending behaviour, face strain and the transverse shear strain distributions has been examined using the nonlinear finite-element methods. The behaviour has been analysed under two different load types, a constant pressure distribution and a slamming pressure distribution, which is typical of boat hulls. Different types of bending responses have been found depending on the curvature of the sandwich panels. The results show that it is necessary to perform a geometric nonlinear analysis in order to get reliable results. For panels with higher curvature, transverse shear strains decrease by 50-90 % as compared to flat plates.

AB - The advantages of sandwich constructions have been known for a long time. In the small-craft industry, the sandwich principle has been used for many years. It has been the favoured solution mainly for boat decks. However, sandwich construction is nowadays gaining more popularity also in hulls. There are major differences between the behaviour of sandwich and single-skin structures. As a consequence, the design of sandwich structures requires some additional considerations. Curved panels are typical of small-craft hulls. Apart from in-plane loads due to the global bending of the hull, they are loaded by hydrostatic pressure and wave-induced slamming pressure. The influence of the curvature of sandwich panels on the bending behaviour, face strain and the transverse shear strain distributions has been examined using the nonlinear finite-element methods. The behaviour has been analysed under two different load types, a constant pressure distribution and a slamming pressure distribution, which is typical of boat hulls. Different types of bending responses have been found depending on the curvature of the sandwich panels. The results show that it is necessary to perform a geometric nonlinear analysis in order to get reliable results. For panels with higher curvature, transverse shear strains decrease by 50-90 % as compared to flat plates.

KW - sandwich panels

KW - sandwich structures

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KW - hulls (structures)

KW - boats

KW - ships

KW - stress analysis

KW - bending

KW - bend properties

KW - shear properties

KW - shear stress

KW - curvature

KW - curved profiles

KW - loads (forces)

KW - structural analysis

M3 - Report

SN - 951-38-3881-1

T3 - Tiedotteita / Valtion teknillinen tutkimuskeskus

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ER -

Hildebrand M. On the bending and transverse shearing behaviour of curved sandwich panels. Espoo: VTT Technical Research Centre of Finland, 1991. 24 p. (Valtion teknillinen tutkimuskeskus. Tiedotteita; No. 1249).