Journal
COMPOSITE STRUCTURES
Volume 272, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2021.114264
Keywords
4D printing of composites; Additive manufacturing; Aircraft stiffeners; Composites; Flexural behaviour; Moldless composite manufacturing
Categories
Funding
- Natural Sciences and Engineering Research Council of Canada
Ask authors/readers for more resources
4D Printing of Composites (4DPC) is a cost-effective manufacturing technique that creates complex composite structures using a flat mold and leveraging the anisotropic nature of unsymmetric laminates. The technique was successfully applied in developing omega-shaped aircraft wing stiffeners with good agreement between calculated stiffness and experimental results.
4D Printing of Composites (abbreviated as 4DPC) is a manufacturing technique where a composite structure of complex geometry can be made without the need to use a complex mold. Only a flat mold is used. As such there are significant savings in time and money. The technique can also be used to make structures that conventional manufacturing technique cannot. The technique relies on the anisotropic nature of unsymmetric laminates. In this paper, this technique is used to develop omega shape (omega) aircraft wing stiffeners. The lay up sequence allows a flat stack of prepregs to transform into the shape of the omega upon curing and cooling to room temperature. Foam is poured into the cavity of the structure to provide core sandwich support. The stiffener is tested under three-point bending. The flexural stiffness of the stiffener is determined using a model and laminate theory. The calculated stiffness is compared with experimental results. Good agreement is obtained.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available