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Characterizing Folding and Deployment Behavior of a foldable ultrathin Composite Heart Stent Device
This thesis aims to characterize the folding and deployment behaviour of an ultra-thin fiber reinforced composite shell for a TAVI-Heart stent application. Therefore a testing-setup needs to be developed to observe the highly non-linear behaviour during the single packaging and deployment stages.
The packaging scheme to achieve such high packaging ratios is based on folding of ultra-thin composite structures. High stiffness, which is required for a sufficient fixation force, is however a contradictory requirement to an easy packaging of the structure. To successfully package the structure, the required forces to reach the desired shape need to be known. High deformations of the very thin material and changing layup over the structure requires an experimental validation of existing simulations. The deployment
of such a structure is dominated by highly non-linear effects and relies completely on the stored elastic energy from packaging. The strong linkage between packaging and deployment requires a testing technique, which can characterize both states. Changing boundary conditions in
the region of deployment need to be taken into account during testing.
The packaging scheme to achieve such high packaging ratios is based on folding of ultra-thin composite structures. High stiffness, which is required for a sufficient fixation force, is however a contradictory requirement to an easy packaging of the structure. To successfully package the structure, the required forces to reach the desired shape need to be known. High deformations of the very thin material and changing layup over the structure requires an experimental validation of existing simulations. The deployment of such a structure is dominated by highly non-linear effects and relies completely on the stored elastic energy from packaging. The strong linkage between packaging and deployment requires a testing technique, which can characterize both states. Changing boundary conditions in the region of deployment need to be taken into account during testing.
Main goal of the thesis is the development of a testing technique
to test folding and deployment of a composite shell of a deployable heart stent device. This testing technique
should be used to gather data about required folding forces as well as to characterize the deployment behavior:
Familiarization with the developed folding/deployment technique as well as the available testing equipment
Design and Manufacturing of a Test-Setup to test folding and deployment of a thin composite shell using the available testing equipment
Manufacture test specimen according to given designs and perform testing
Gather and process testing data to characterize folding and deployment behavior
Main goal of the thesis is the development of a testing technique to test folding and deployment of a composite shell of a deployable heart stent device. This testing technique should be used to gather data about required folding forces as well as to characterize the deployment behavior: Familiarization with the developed folding/deployment technique as well as the available testing equipment Design and Manufacturing of a Test-Setup to test folding and deployment of a thin composite shell using the available testing equipment Manufacture test specimen according to given designs and perform testing Gather and process testing data to characterize folding and deployment behavior
ETH Zürich
Arthur Schlothauer
LEE 0 225
Leonhardstrasse 21
8092 Zürich
Phone: +41 44 632 67 02
arthursc@ethz.ch
ETH Zürich Arthur Schlothauer LEE 0 225 Leonhardstrasse 21 8092 Zürich Phone: +41 44 632 67 02 arthursc@ethz.ch