Details
| Original language | English |
|---|---|
| Article number | 108212 |
| Journal | Thin-walled structures |
| Volume | 168 |
| Early online date | 18 Aug 2021 |
| Publication status | Published - Nov 2021 |
Abstract
Unsymmetric laminates exhibiting two stable equilibrium shapes due to the induced thermal residual stresses have been extensively explored in recent years. The potential energy wells for such bistable systems have a considerable influence on the stable shapes and their snap-through behavior. For a square shaped cross-ply laminate, both stable shapes, having their principal curvatures orthogonal to each other, possess identical potential energies. However, applications pertaining to morphing systems requiring different snap-through and snap-back forces and the design of metamaterials for wave propagation demands asymmetry in the potential energy landscape. Motivated by such applications, a novel strategy is proposed to realize a tunable potential energy landscape in a square bistable cross-ply laminate by attaching an additional strip. A fully non-linear finite element model is employed to model and analyze an unsymmetrical laminate with an additional strip. The results of the cool-down shapes are verified using a corresponding Rayleigh–Ritz based semi-analytical formulation. A systematic parametric study using the developed finite element method is further performed to explore the changes in the potential energy landscape and its dependencies on geometric parameters like width, thickness, orientation, and the location of the strip. Consequently, the effect of the snap forces on changing the aforementioned parameters are also investigated.
Keywords
- Bistability, Composite, Laminates, Snap-through, Strain energy
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Building and Construction
- Engineering(all)
- Mechanical Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Thin-walled structures, Vol. 168, 108212, 11.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Tailoring bistability in unsymmetrical laminates using an additional composite strip
AU - Kumar, A. Phanendra
AU - Anilkumar, P. M.
AU - Haldar, A.
AU - Scheffler, S.
AU - Jansen, E. L.
AU - Rao, B. N.
AU - Rolfes, R.
N1 - Funding Information: Authors would like to acknowledge the Scholarship funded by German Academic Exchange Service: Deutscher Akademischer Austauschdienst–DAAD , during the course of this research. The second author would like extend the acknowledgment to Prime Minister’s Research Fellowship Scheme, India for the support during the research.
PY - 2021/11
Y1 - 2021/11
N2 - Unsymmetric laminates exhibiting two stable equilibrium shapes due to the induced thermal residual stresses have been extensively explored in recent years. The potential energy wells for such bistable systems have a considerable influence on the stable shapes and their snap-through behavior. For a square shaped cross-ply laminate, both stable shapes, having their principal curvatures orthogonal to each other, possess identical potential energies. However, applications pertaining to morphing systems requiring different snap-through and snap-back forces and the design of metamaterials for wave propagation demands asymmetry in the potential energy landscape. Motivated by such applications, a novel strategy is proposed to realize a tunable potential energy landscape in a square bistable cross-ply laminate by attaching an additional strip. A fully non-linear finite element model is employed to model and analyze an unsymmetrical laminate with an additional strip. The results of the cool-down shapes are verified using a corresponding Rayleigh–Ritz based semi-analytical formulation. A systematic parametric study using the developed finite element method is further performed to explore the changes in the potential energy landscape and its dependencies on geometric parameters like width, thickness, orientation, and the location of the strip. Consequently, the effect of the snap forces on changing the aforementioned parameters are also investigated.
AB - Unsymmetric laminates exhibiting two stable equilibrium shapes due to the induced thermal residual stresses have been extensively explored in recent years. The potential energy wells for such bistable systems have a considerable influence on the stable shapes and their snap-through behavior. For a square shaped cross-ply laminate, both stable shapes, having their principal curvatures orthogonal to each other, possess identical potential energies. However, applications pertaining to morphing systems requiring different snap-through and snap-back forces and the design of metamaterials for wave propagation demands asymmetry in the potential energy landscape. Motivated by such applications, a novel strategy is proposed to realize a tunable potential energy landscape in a square bistable cross-ply laminate by attaching an additional strip. A fully non-linear finite element model is employed to model and analyze an unsymmetrical laminate with an additional strip. The results of the cool-down shapes are verified using a corresponding Rayleigh–Ritz based semi-analytical formulation. A systematic parametric study using the developed finite element method is further performed to explore the changes in the potential energy landscape and its dependencies on geometric parameters like width, thickness, orientation, and the location of the strip. Consequently, the effect of the snap forces on changing the aforementioned parameters are also investigated.
KW - Bistability
KW - Composite
KW - Laminates
KW - Snap-through
KW - Strain energy
UR - http://www.scopus.com/inward/record.url?scp=85112811778&partnerID=8YFLogxK
U2 - 10.1016/j.tws.2021.108212
DO - 10.1016/j.tws.2021.108212
M3 - Article
AN - SCOPUS:85112811778
VL - 168
JO - Thin-walled structures
JF - Thin-walled structures
SN - 0263-8231
M1 - 108212
ER -