Abstract
The primary objective of this paper is to propose a novel analytical design and
implementation framework for deployable scissor-hinge structures which can offer a
wide range of form flexibility. When the current research on deployable structures is
investigated, it can be observed that most of these structures have predefined open and
closed body forms; and transformations occurs between these two forms by using one of the various transformation types such as sliding, deploying, and folding. Thus, these
examples are insufficient to constitute real form flexibility. To alleviate this deficiency,
this paper introduces a novel scissor-hinge structural mechanism (SSM) which can
transform between planar rectilinear geometries and spatial double-curved shapes
without changing the size of the covered area. This novel structural mechanism has both
planar and spatial versions, and to achieve such kind of form flexibility, it incorporates
a new primary element called modified scissor-like element (M-SLE) and a new
connection type for the spatial systems. Thus, it becomes possible to transform the
geometry of the whole system without changing the span length. In the paper, first,
properties of common scissor-hinge systems are summarized. Then, the proposed planar
SSM, its primary elements, transformation and structural capability, are explained.
Finally, the proposed spatial SSM, which is derived from its planar counterpart, its
primary elements, novel connection type, transformation and structural capability are
thoroughly investigated.
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