Abstract
Passive spanwise bending shape-adaption has the potential to increase the efficiency and manoeuvrability of vehicles with wing-like structures. This paper presents a passive spanwise bending shape-adaption concept for highly loaded wing-like structures based on local buckling of the compression flange at a prescribed external bending moment. Buckling reduces the in-plane stiffness of the compression flange and thus yields a beam design with a high prebuckling and a low postbuckling bending stiffness. The investigated concept is experimentally validated using a composite four-point bending beam, which is designed to experience compression flange buckling between the load introductions. The point of buckling is at 374.80 Nm, and ultimate failure occurred in the experiment at 524 Nm, which results in a postbuckling range of 149.2 Nm. The bending stiffness was reduced by more than 41% after the point of buckling which shows the effectiveness of compression flange buckling for nonlinear bending compliance. This proof of concept has demonstrated for the first time, that compression flange buckling is a viable structural concept for highly loaded composite beam structures to achieve nonlinear bending compliance.
Original language | English |
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Title of host publication | ECCM 2018 - 18th European Conference on Composite Materials |
Publisher | Applied Mechanics Laboratory |
Number of pages | 8 |
ISBN (Electronic) | 9781510896932 |
Publication status | Published - 1 Jan 2020 |
Externally published | Yes |
Event | ECCM18: 18th European Conference on Composite Materials - Athens, Greece Duration: 24 Jun 2018 → 28 Jun 2018 Conference number: 18 http://www.eccm18.org/ |
Publication series
Name | ECCM 2018 - 18th European Conference on Composite Materials |
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Conference
Conference | ECCM18: 18th European Conference on Composite Materials |
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Abbreviated title | ECCM18 |
Country/Territory | Greece |
City | Athens |
Period | 24/06/18 → 28/06/18 |
Internet address |
Keywords
- Buckling
- Nonlinear compliance
- Postbuckling
- Shape adaptation
- Thin ply composite