Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2021 |
| Publisher | American Society of Mechanical Engineers(ASME) |
| ISBN (electronic) | 9780791885499 |
| Publication status | Published - 21 Oct 2021 |
| Event | ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2021 - Virtual, Online Duration: 14 Sept 2021 → 15 Sept 2021 |
Abstract
Multistable morphing structures have gained considerable attention over the past three decades due to their ability to efficiently work in various operating conditions. Unsymmetrical laminates, which yields two stable equilibrium shapes due to the residual thermal stresses, are widely investigated to produce multistable structures. Even though cured shapes of unsymmetrical laminates are promising candidates for the design of morphing structural components, they may not fulfil all the requirements of a continuous morphing structure requiring more than two stable states during the morphing action. As a solution to achieve more than two stable configurations, series-connected unsymmetrical laminates are proposed in the present analysis. Connecting different bistable laminates results in multiple stable configurations at the end of the curing process, which is often desired in continuous shape-changing applications. The snapthrough process involving shape transition between the generated stable shapes is highly nonlinear in nature. Since morphing aerospace structures are often subjected to severe dynamic excitation, large-amplitude nonlinear vibrations are inevitable during the snap-through transition. This work aims to explore the dynamic characteristic of multistable continuous composite plates generated by connecting bistable laminates without any external fixing aids. The proposed numerical analysis is carried out within a commercially available finite element package, ABAQUS. The effect of aspect ratios, laminate layups and actuation loads on the dynamic characteristic (natural frequencies and mode shapes) are reported from systematic parametric studies. The proposed model is further extended to predict the nonlinear characteristics of single well vibration and cross well vibration.
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Mechanics of Materials
- Computer Science(all)
- Artificial Intelligence
Sustainable Development Goals
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Proceedings of ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2021. American Society of Mechanical Engineers(ASME), 2021. V001T07A006.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Numerical Studies on the Dynamic Characteristics of Series-Connected Multistable Laminates
AU - Anilkumar, P. M.
AU - Rao, B. N.
AU - Haldar, A.
AU - Scheffler, S.
AU - Rolfes, R.
AU - Jansen, E. L.
N1 - Funding Information: Authors would like to acknowledge Prime Minister’s Research Fellowship (PMRF) scheme and the German Academic Exchange Service: Deutscher Akademischer Austauschdienst (DAAD), for the research grant on Doctoral Degrees during the course of first author’s doctoral research.
PY - 2021/10/21
Y1 - 2021/10/21
N2 - Multistable morphing structures have gained considerable attention over the past three decades due to their ability to efficiently work in various operating conditions. Unsymmetrical laminates, which yields two stable equilibrium shapes due to the residual thermal stresses, are widely investigated to produce multistable structures. Even though cured shapes of unsymmetrical laminates are promising candidates for the design of morphing structural components, they may not fulfil all the requirements of a continuous morphing structure requiring more than two stable states during the morphing action. As a solution to achieve more than two stable configurations, series-connected unsymmetrical laminates are proposed in the present analysis. Connecting different bistable laminates results in multiple stable configurations at the end of the curing process, which is often desired in continuous shape-changing applications. The snapthrough process involving shape transition between the generated stable shapes is highly nonlinear in nature. Since morphing aerospace structures are often subjected to severe dynamic excitation, large-amplitude nonlinear vibrations are inevitable during the snap-through transition. This work aims to explore the dynamic characteristic of multistable continuous composite plates generated by connecting bistable laminates without any external fixing aids. The proposed numerical analysis is carried out within a commercially available finite element package, ABAQUS. The effect of aspect ratios, laminate layups and actuation loads on the dynamic characteristic (natural frequencies and mode shapes) are reported from systematic parametric studies. The proposed model is further extended to predict the nonlinear characteristics of single well vibration and cross well vibration.
AB - Multistable morphing structures have gained considerable attention over the past three decades due to their ability to efficiently work in various operating conditions. Unsymmetrical laminates, which yields two stable equilibrium shapes due to the residual thermal stresses, are widely investigated to produce multistable structures. Even though cured shapes of unsymmetrical laminates are promising candidates for the design of morphing structural components, they may not fulfil all the requirements of a continuous morphing structure requiring more than two stable states during the morphing action. As a solution to achieve more than two stable configurations, series-connected unsymmetrical laminates are proposed in the present analysis. Connecting different bistable laminates results in multiple stable configurations at the end of the curing process, which is often desired in continuous shape-changing applications. The snapthrough process involving shape transition between the generated stable shapes is highly nonlinear in nature. Since morphing aerospace structures are often subjected to severe dynamic excitation, large-amplitude nonlinear vibrations are inevitable during the snap-through transition. This work aims to explore the dynamic characteristic of multistable continuous composite plates generated by connecting bistable laminates without any external fixing aids. The proposed numerical analysis is carried out within a commercially available finite element package, ABAQUS. The effect of aspect ratios, laminate layups and actuation loads on the dynamic characteristic (natural frequencies and mode shapes) are reported from systematic parametric studies. The proposed model is further extended to predict the nonlinear characteristics of single well vibration and cross well vibration.
UR - http://www.scopus.com/inward/record.url?scp=85118104348&partnerID=8YFLogxK
U2 - 10.1115/SMASIS2021-68073
DO - 10.1115/SMASIS2021-68073
M3 - Conference contribution
AN - SCOPUS:85118104348
BT - Proceedings of ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2021
PB - American Society of Mechanical Engineers(ASME)
T2 - ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2021
Y2 - 14 September 2021 through 15 September 2021
ER -