Zip Shape Kerfing
Students | Shuyao Dai Tutors | Vishu Bhooshan | Tommaso Casucci | Shajay Bhooshan
Bartlett AC Studio 3
Prior Works What
Results
Conclusions
Future Work
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Previous study | Strip Kerfing | Physical Model Test
Adaptive Kerfing
Shuyao Dai| Bartlett AC Studio 3
Precedents | zip shape wood
Brad, Crane, McGee Andrew, Prado Marshall, and Zhao Yang. n.d. ‘Kerf-Based Complex Wood Systems’. Accessed 9 December 2019. http://www.achimmenges.net/?p=5006.
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Precedents | zip shape wood for furniture
Song, P., Fu, C. W., Goswami, P., Zheng, J., Mitra, N. J., & Cohen-Or, D. (2013). Reciprocal frame structures made easy. ACM Transactions on Graphics (TOG), 32(4), 94.
Zip Shape Kerfing
Student Names | Bartlett AC Studio 3
Precedents | zip shape wood for a small pavilion
Schleicher, Simon, Riccardo La Magna, and Joshua Zabel. 2017. “Bending-Active Sandwich Shells: Studio One Research Pavilion 2017.” Disciplines and Disruption - Proceedings Catalog of the 37th Annual Conference of the Association for Computer Aided Design in Architecture, ACADIA 2017, 544–51.
Zip Shape Kerfing
Student Names | Bartlett AC Studio 3
Precedents | the Asymptotic Gridshell
Schling, Eike, Martin Kilian, Hui Wang, Jonas Schikore, and Helmut Pottman. 2018. “Design and Construction of Curved Support Structures with Repetitive Parameters.” Advances in Architectural Geometry, no. September: 140–65. https://research.chalmers.se/en/publication/504188.
Zip Shape Kerfing
Student Names | Bartlett AC Studio 3
Research object: • 1) to develop a tool kit for the interlock kerfing structure and at the same time improve the tooth pattern generation strategy. • 2) to explore the integration of the interlock kerfing in a context of the asymptotic gridshell structure.
Why: • Lack specific digital generation tool for zip shape kerfing. • Lack fabrication considered tool. • Improve the zip interlock adaptive ability and border the range of application. • Explore the possibility of applying this system into a façade / architectural scare within a real design context.
Zip Shape Kerfing
Student Names | Bartlett AC Studio 3
Prior Works
What Results
Conclusions
Future Work
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Grasshopper Plugin of the tool kit with 6 components
Zip Shape Kerfing
Generate adaptive base points of teeth
Generate adaptive teeth
Unroll teeth for fabrication
Extracting Asymptotic Lines from a minimal surface
Layout the strips
Evaluate the deviation of unrolled model Shuyao Dai| Bartlett AC Studio 3
Grasshopper Plugin of the tool kit with 6 components
Zip Shape Kerfing
Generate adaptive base points of teeth
Generate adaptive teeth
Unroll teeth for fabrication
Extracting Asymptotic Lines from a minimal surface
Layout the strips
Evaluate the deviation of unrolled model Shuyao Dai| Bartlett AC Studio 3
A Minimal Surface
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Asymptotic Curves _ Find zero curvature
Normal vector
Planes of curvature
Rotate planes
Until curvature is zero
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Asymptotic Curves _ Find path based on accuracy
When curvature K=0
Find next point that k = 0 too
Continue search the points based on accuracy
Connect to get the Asymptotic Curves
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Asymptotic Curves _ on a minimal surface
Base lines
Project lines to the surface
Get start points on base lines
Calculate the Asymptotic Curves based on start points
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Studies | Practice1 _ Minimal Surface _ Asymptotic lines _ without twist
Get the plane of the asymptotic curves
Get the strip along the plane normal
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Studies | Practice1 _ Minimal Surface _ Asymptotic lines _ with twist
Get the intersection points on curves
Get the surface normal directions based on points
Get the strip along the surface normal
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Studies | Practice1 _ Minimal Surface _ Asymptotic lines _ with twist
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Grasshopper Plugin of the tool kit with 6 components
Zip Shape Kerfing
Generate adaptive base points of teeth
Generate adaptive teeth
Unroll teeth for fabrication
Extracting Asymptotic Lines from a minimal surface
Layout the strips
Evaluate the deviation of unrolled model Shuyao Dai| Bartlett AC Studio 3
Asymptotic Curves _ Adaptive layout for fabrication
Al l asymptotic Curves
Zip Shape Kerfing
Layout all asymptotic Curves
Shuyao Dai| Bartlett AC Studio 3
Adaptive teeth
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Grasshopper Plugin of the tool kit with 6 components
Zip Shape Kerfing
Generate adaptive base points of teeth
Generate adaptive teeth
Unroll teeth for fabrication
Extracting Asymptotic Lines from a minimal surface
Layout the strips
Evaluate the deviation of unrolled model Shuyao Dai| Bartlett AC Studio 3
Adaptive teeth _ Divide initial curve based on curvature
Maximum Segment Length = x K = ( 1 / Curvature) / 100 Next Segment Length = D = x * K = x * ((1 / Curvature) / 100) Curvature Value is constrained in range of 0.01 to 1. Almost cover the effective range of bending, but it can be extended. Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Grasshopper Plugin of the tool kit with 6 components
Zip Shape Kerfing
Generate adaptive base points of teeth
Generate adaptive teeth
Unroll teeth for fabrication
Extracting Asymptotic Lines from a minimal surface
Layout the strips
Evaluate the deviation of unrolled model Shuyao Dai| Bartlett AC Studio 3
Adaptive teeth _ Adaptive teeth angles
θ
Thickness of the section = T Segment length = D Compare D(i) and D(i + 1) Teeth Offset Value (TOV) = The smaller D * R Angle Ratio = R = TOV / D θ = arctan(TOV / ( T / 2 ))
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Studies | head and tail
Low curvature
High curvature
Studies | adaptive teeth _ density
Low curvature
High curvature
Studies | adaptive teeth _ thickness
Low curvature
High curvature
Studies | adaptive teeth _ angle
Low curvature
High curvature
Grasshopper Plugin of the tool kit with 6 components
Zip Shape Kerfing
Generate adaptive base points of teeth
Generate adaptive teeth
Unroll teeth for fabrication
Extracting Asymptotic Lines from a minimal surface
Layout the strips
Evaluate the deviation of unrolled model Shuyao Dai| Bartlett AC Studio 3
Adaptive teeth _ Teeth unroll
Segments length = A & B Teeth angle = θ Flatten the teeth base on keeping the teeth shape of both sides in order to facilitate fabrication
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Studies | unroll teeth and fabrication
Studies | 3D view of unroll teeth
Adaptive teeth
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Previous study | Strip Kerfing | Physical test
Adaptive Kerfing
Shuyao Dai| Bartlett AC Studio 3
Complex Behaviors _ kerfing lines
1 -- Kerfing lines with angle Type B
2 -- Kerfing lines without angle Type A
Zip Shape Kerfing
1 -- Kerfing result in twisting
2 -- Kerfing result in no twisting
Shuyao Dai| Bartlett AC Studio 3
Complex Behaviors _ kerfing lines
3 -- Kerfing lines with angle and single side shrink Type C
4 -- Kerfing lines without angle and both sides shrink Type D
Zip Shape Kerfing
3 -- Kerfing result in one side twisting
4 -- Kerfing result in both sides twisting
Shuyao Dai| Bartlett AC Studio 3
Studies | complex behavior_ ruling kerfing lines
Type C -- Kerfing lines with angle and single side shrink
Type D -- Kerfing lines without angle
Type C -- Kerfing lines with angle and single side shrink
and both sides shrink
Type B -- Kerfing
lines without angle
Type A -- Kerfing lines with angle
Zip Shape Kerfing
Type C -- Kerfing lines with angle and single side shrink
Shuyao Dai| Bartlett AC Studio 3
Studies | complex behavior_ ruling kerfing lines
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Studies | complex behavior_ 3D tooth generation strategy
Bend and twist simulation
Map the ruling lines into a plane
3D tooth constructed from rulings Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Prior Works
What
Results Conclusions
Future Work
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Asymptomatic structure _ strip without twist
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Asymptomatic structure _ strip without twist
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Asymptomatic structure _ twisted strip
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Prior Works
What
Results
Conclusions Future Work
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Conclusion
• Successfully develop a generation tool kit for zip shape kerfing. • Improve the adaptive ability of the zip interlock system by introducing an adaptive tooth strategy. • Develop the tool kit with consideration of fabrication.
• I find that within a real design context like the Asymptotic Gridshell, the zip interlock system needs further improvement of adaptivity: • The flat strip without twist which has been developed in the tool kit should be treated as a special condition of a twisted strip in the zip kerfing system. • Another is the twisted strip which can be achieved by controlling the angles of kerfing lines, but how to cooperate with adaptive teeth need further study and test.
Zip Shape Kerfing
Student Names | Bartlett AC Studio 3
Prior Works
What
Results
Conclusions
Future Work
Zip Shape Kerfing
Shuyao Dai| Bartlett AC Studio 3
Future works
• Further develop the tool kit for the complex strip with adaptive tooth. • Develop a component for bending simulation and generate adaptive tooth pattern based on the simulation result. • Develop a component for finding the ruling lines on a simulation strip. • And more physical tests are needed in order to know the limitation of using this system to achieve bending and twisting strips.
Zip Shape Kerfing
Student Names | Bartlett AC Studio 3
Thank you.