Design of multistable composites for application in adaptive structures

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

Abstract

During the manufacturing process and operating conditions of multilayered fibre-reinforced composites with variable fibre orientations, residual stresses build up due to the directional expansion of the unidirectionally reinforced single layers. Dependent on the laminate lay-up, these inhomogeneous residual stresses, which are primarily caused by thermal effects, moisture absorption and chemical shrinkage, can lead to large multistable out-of-plane deformations in the case of unsymmetric laminates. Instead of avoiding these laminate's curvatures, they can be advantageously used for technical applications such as novel adaptive structures. In order to adjust the laminate deformations to technical requirements, a dimensioning tool based on a modified stability analysis in combination with a novel optimisation procedure has been developed and experimentally verified. Based on the theoretical investigations, an adaptive prototype of a multistable composite with integrated smart alloys has been designed and manufactured.

Details

Original languageEnglish
Pages (from-to)2201-2207
Number of pages7
JournalComposites science and technology
Volume62
Issue number16
Publication statusPublished - Dec 2002
Peer-reviewedYes

External IDs

ORCID /0000-0003-1370-064X/work/142243679

Keywords

Keywords

  • C. Residual stresses, Multistable composites