Design Approximation and Proof Test Methods for a Cellular Material Structure

Cramer, N.; Jenett, Ben; Swei, Sean Shan‐Min; Cheung, Kenneth C.

doi:10.2514/6.2019-1861

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…This accounted for chord-wise loading distribution per distribution of sample cross sections, and span-wise loading was approximating an elliptical load distribution. Further details on the actual construction of the whiffletree can be found in [31].…”

Section: Experimental Results and Validationmentioning

confidence: 99%

Elastic shape morphing of ultralight structures by programmable assembly

Cramer

Cellucci

Formoso³

et al. 2019

Smart Mater. Struct.

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Ultralight materials present an opportunity to dramatically increase the efficiency of load-bearing aerostructures. To date, however, these ultralight materials have generally been confined to the laboratory bench-top, due to dimensional constraints of the manufacturing processes. We show a programmable material system applied as a large-scale, ultralight, and conformable aeroelastic structure. The use of a modular, lattice-based, ultralight material results in stiffness typical of an elastomer (2.6 MPa) at a mass density typical of an aerogel 5.6 mg cm 3 (). This, combined with a building block based manufacturing and configuration strategy, enables the rapid realization of new adaptive structures and mechanisms. The heterogeneous design with programmable anisotropy allows for enhanced elastic and global shape deformation in response to external loading, making it useful for tuned fluid-structure interaction. We demonstrate an example application experiment using two building block types for the primary structure of a 4.27 m wingspan aircraft, where we spatially program elastic shape morphing to increase aerodynamic efficiency and improve roll control authority, demonstrated with full-scale wind tunnel testing.

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Section: Experimental Results and Validationmentioning

confidence: 99%

Elastic shape morphing of ultralight structures by programmable assembly

Cramer

Cellucci

Formoso³

et al. 2019

Smart Mater. Struct.

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“…The validity of this method for cubes of voxels was shown through Instron testing [10], and for this wing with a whiffletree test. [13,16] This approach is similar to the approach used by Nguyen et. al.…”

Section: Fig 2 Voxel-based Airfoil Modeling Workflowmentioning

confidence: 99%

Modeling of Tunable Elastic Ultralight Aircraft

Cramer

Kim

Gregg

et al. 2019

AIAA Aviation 2019 Forum

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Aircraft weight is one of the most critical factors in the design and operation of modern vehicles. The ability to integrate ultra-light materials into the primary load bearing structures has the potential to reduce aircraft weight significantly. Ultralight materials tend to be latticebased meta-materials that are difficult and computationally expensive to model. One of the advantages of meta-materials is to be able to tune or "program" their bulk material properties through the placement of heterogeneous components in the material. A large amount of time devoted to the simulation in the development time for the tuning of the material can be a barrier to the adoption of large scale lattice materials. In this paper, we present a workflow and analysis tool-set to provide first-order estimates for rapid development of engineered lattice materials for aerospace applications. We present results for estimating the displacement and maximum structural stresses.

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Readiness levels of Industry 4.0 technologies applied to aircraft manufacturing—a review, challenges and trends

Zutin

Barbosa

Barros

et al. 2022

Int J Adv Manuf Technol

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The present paper provides an overview of the state-of-the-art research, outlining the applications of the Industry 4.0 (I4.0) technologies on the aircraft manufacturing sector and their maturity state based on the technology readiness level (TRL) scale. A literature review has been conducted for the identification, selection, and evaluation of the published research. A total of 57 papers extracted from the two most relevant scientific databases for the area (Web of Science and Scopus), from 2010 to March 2021, were analysed and summarized. The research, analysis, and evaluation of these papers has provided an outlook of how the aircraft manufacturing industry is inserted into the I4.0 context, based on a classification of the I4.0 technologies maturity for this industrial branch. Then, a survey was performed with 12 specialists from 5 different aircraft manufacturing companies aiming to report the practical point-of-view in this area. Thus, this paper highlights and discusses the gaps found in the literature related to the I4.0 technologies applied to aircraft manufacturing and their main useful implications not only from the academic point-of-view but also from competitive business aspects, providing recommendations for industrial managers, engineers, and stakeholders. Finally, this paper proposes new opportunities and challenges for future research.

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Design Approximation and Proof Test Methods for a Cellular Material Structure

Cited by 3 publications

References 3 publications

Elastic shape morphing of ultralight structures by programmable assembly

Elastic shape morphing of ultralight structures by programmable assembly

Modeling of Tunable Elastic Ultralight Aircraft

Readiness levels of Industry 4.0 technologies applied to aircraft manufacturing—a review, challenges and trends

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