Bio-inspired integrated pneumatic actuation for compliant fiber-reinforced plastics

Mader, Anja; Born, Larissa; Körner, Axel; Schieber, Gundula; Masset, Pierre-Alexandre; Milwich, M.; Gresser, Götz T.; Knippers, Jan

doi:10.1016/j.compstruct.2019.111558

Cited by 5 publications

(6 citation statements)

References 9 publications

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“…The second series of tests investigate the influence of hinge width. The investigated hinge widths are based on experience values from previous research work and experiments [ 8 , 9 ]. The hinge width was increased by 2.5 cm steps, ranging from 5 cm to 15 cm width.…”

Section: Resultsmentioning

confidence: 99%

“…Based on preliminary research [ 8 , 13 , 14 ] regarding actuated FRPs, a combination of elastomer, GFRP and TPU film is used. The stiffness ratio between the laminate above and below the actuation chamber is adjusted by the GFRP content in the laminate set-up.…”

Section: Methodsmentioning

confidence: 99%

“… Actuation principle of elements with embedded pneumatic actuators with ( a ) plates with identical stiffness, leading to a shortening in length and ( b ) elements with plates of asymmetrical stiffness causing an angular displacement (adapted from [ 8 ]). …”

Section: Figurementioning

confidence: 99%

“…The wing-folding pattern of Graphosoma lineatum italicum was identified as flexagon principle and served as a basis for the geometry and folding pattern of Flexafold. Studies on the material set-up of hollow wing veins of the beetle Dorcus titanus platymelus were transferred into a FRP with a stiffness gradient from a flexible hinge zone to stiffer areas subjected to angular displacement, enabling the technical implementation of the Flexafold demonstrator [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…The second principle is the folding mechanism based on the hollow wing veins ( Figure 1 e) [ 8 ]. The hollow wing is enclosed by resilin (flexible) and sclerotin (stiff) in different proportions on the upper and lower side of the hollow vein.…”

Section: Introductionmentioning

confidence: 99%

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Deformation Behavior of Elastomer-Glass Fiber-Reinforced Plastics in Dependence of Pneumatic Actuation

et al. 2021

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This paper aims to define the influencing design criteria for compliant folding mechanisms with pneumatically actuated hinges consisting of fiber-reinforced plastic (FRP). Through simulation and physical testing, the influence of stiffness, hinge width as well as variation of the stiffness, in the flaps without changing the stiffness in the hinge zone, was evaluated. Within a finite element model software, a workflow was developed for simulations, in order to infer mathematical models for the prediction of mechanical properties and the deformation behavior as a function of the aforementioned parameters. In conclusion, the bending angle increases with decreasing material stiffness and with increasing hinge width, while it is not affected by the flap stiffness itself. The defined workflow builds a basis for the development of a predictive model for the deformation behavior of FRPs.

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Section: Resultsmentioning

confidence: 99%