WIT Digital Architecture & Constructure國際研討會 論文接受

Digital Architecture and Construction Conference
Form and fabric: computer integrated construction and manufacturing
A bionic-based fabrication of digital skin for free forms

This study applied 1) bionic model, 2) mathematic model, and 3) object
model to analyze growing features of herb stem cells. The features, which
include revolution, twist, tortuous, and fork are summarized from
Phototropism, Gravitropism, Thigmotropism, and Hydrotropism. Rules
are developed for frames and skins and eventually a freeform
120cm*120cm*200cm object is created.

The process starts from the analysis of architectural composition rule
through bionic features. Along with the three models developed, a
primitive is made of 14 faces, 24, node, 36 edges in 8 hexagon and 6
rectangular. The primitive was later developed into many versions by
trimming excess members and angles as a way to lower budget and
simplify calculation. As the modification was made, a similarity was
found between the bionic structure and space frame when a single layer
of cells was applied.

A real model about 200 cm high was made using the modified primitive
shape to formulate skeleton and a software Lamina to differentiate skin
patches. As a result, the composition rules enable a logic characteristic
feasible for digital fabrication in fast and accurate manner. The bionic-
modulated free form is also used to eliminate the construction effort and
to reduce cost in fabrication. The skin with resilient fabric helps to
maintain shape under deformation and allow for larger tolerance.

RP models were printed to study shapes. In near future, a 3D scanner would
be used to quantify the offset of skins under different levels of deformation.