טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentInbal Peled
SubjectStudy of the Deployable Structures Implementing Combined
Simultaneous Usage of Deployment Methods
DepartmentDepartment of Architecture and Town Planning
Supervisor
Full Thesis text - in Hebrew Full thesis text - Hebrew Version


Abstract

This research deals with deployable structures, characterized by periodical motion in volume enabling deployment and stowing multiple times. Usually deployment is based on a single method.

The research hypothesis is that combining several deployment methods simultaneously may produce a more efficient structure and suggest new options of deployment.

Examining options for integrating systems is carried out by presenting examples from several fields using literature review and by constructing small-scale models.

A combination table was developed as a design tool, mapping the present field of study while presenting a developable platform which describes future research options. Several combinations were generally examined. Folding & Scrolling was chosen to be the case-study of this research.

Two significant conclusions emerged:                  

•           Single deployment method and its reverse processes applied in two dimensions are

similar to simultaneous deployment involving two diverse methods.

•           Combining two deployment methods simultaneously may create a variety of new compact configurations.

Three new deployment methods were explored: Coiling, Rolling-Up and Twisting (Torsion).

During the experiment a new original method was identified. This model did not scroll but coiled. This spatial result opens up a hatch to define the term and concept "compactness" alongside the term "efficiency". Combining the deployments methods Folding & Scrolling has been investigated by the author through experiments sets examining folding patterns having different numbers of "basic units". Unlike researchers' conclusions that deployment by Folding & Scrolling (Wrapping) can be applied in a folding tessellation consisting of straight lines, the author suggests that the significant conclusion is that deploying/packing in Folding & Scrolling/Wrapping requires the usage of curves both in advance and retroactively - due to material properties. The deformation results in paper or a sheet is a plastic deformation, hence, right after first scrolling, a three-dimensional spatial shell is obtained, particularly in a periodic motion that creates three-dimensional mechanisms, capable of carrying axial forces, therefore, curved folding will never be completely packed.

In summary, the table of combinations, presenting at the beginning of the research a study field of 21 combinations has been upgraded at the end of the study to containing 55 combinations. Further research might reveal other possibilities as well as examine feasibility of the suggested combinations.