mpression bending test apparatus has been developed to measure the flexural properties of plywood-fiberglass composite slender beams. The number of fiberglass layers and the orientation of the fibres along the strip have been examined, in order to calibrate the bending behaviour of each strip segment, aiming to encode complex 3d form into flat 2d strips, which bent and anchored at both ends, form non-symmetrical arch shapes of variable curvature. The results show that the proposed method enables a unified materially informed form finding process, where the geometry is approximated according to local material specifications at macro, meso and micro scale. Informing physics based simulations with material properties data derived from the proposed mechanical testing scheme, allowed for fairly accurate material behaviour simulations, with deviations attributed, besides the non-standardized apparatus measurements, mainly to the manual fiberglass layup and the number of mechanical tests conducted for the calculation of the mechanical properties of each fiberglass layout variation.
more: https://www.researchgate.net/publication/329016703_Vision-based_compression_bending_test_apparatus_Stiffness_grading_of_plywood_fiberglass_composite_strips
Test report sample : https://vimeo.com/242117397
using:
Grasshopper for Rhino3D (David Rutten)
grasshopper3d.com/
Kangaroo 2 grasshopper plugin (Daniel Piker)
https://www.food4rhino.com/app/kangaroo-physics
K2Engineering grasshopper plugin (Cecilie Brandt)
https://github.com/CecilieBrandt/K2Engineering
Human grasshopper plugin (Andrew Heumann)
andrewheumann.com/#computation
Tracker Video analysis and modeling tool (Douglas Brown)
physlets.org/tracker/
compadre.org/osp/bulletinboard/home.cfm
Tracks:
Poptraume -Traume-fon by rubber-records(gr)
https://rubber-recordsgr.bandcamp.com/track/poptraume-traume-fon
Poptraume - 4m2m bios records#002…
o fix before it becomes very usable, but I'm posting the file here in case anyone wants to try it out.
It is a few simple scripts which record point locations from a first Kangaroo simulation whenever the capture button is pressed, and then when you playback the animation it interpolates between this captured sequence of points, pulling a second Kangaroo simulation to these targets. You can control the playback with a slider or automatically with a timer.
This should work with other Kangaroo2 setups, but here demonstrated with a human figure modelled as a collection of rigid bodies. At the knees and elbows the rigid bodies share 2 points to give a hinge joint, while for shoulders, neck, hips, ankles, wrists and torso they share only single points, giving a basic ball joint.
This is also the first time I've posted this model, and I'm also including the setup without the animation script. I know there are numerous issues with this poseable figure - dragging joints sometimes moves parts of the model you don't want to, and joints have unrealistic ranges of motion. I made a start at trying to limit some of these - such as ClampLength goals to stop the torso bending too much, but more could be done. There is also an issue with the rigid bodies (which track orientations with a frame of 3 points) that if you grab the frame itself, the simulation can break. I'm currently rethinking this whole approach.
I should also say that although I have heavily modified this human model to make it work for this setup, I did start from a mesh downloaded from some free 3d model collection site, but unfortunately I do not know the name of the original artist. If someone recognises it I would like to add appropriate credits.…
Introduction to Grasshopper Videos by David Rutten.
Wondering how to get started with Grasshopper? Look no further. Spend an some time with the creator of Grasshopper, David Rutten, to learn the
curves A and B.
For each point pA on curve A,
you need the corresponding tangent vector tA on curve A, and the lists of "cone" vectors pB(j)-pA and tangent vectors tB(j) on curve B. so you have three vectors tA, tB(j) and AB(j)
these three vectors define a parallelogram thas varies along j
3d determinant of the three vectors above gives you the volume of this parallelogram. When 3dDet = 0 then it means it's flat, the vectors are coplanar. Thats what we're looking for.
So you just need to plot the curve 3Ddet = f(pB) , still for each point on A
'pB is the parameter here'
graphically solve these cuves to find the zeros and you feed back the resulting parameter in curve B. draw te line, done.
You can manage double solutions or cusps directly on the plot by using clostest point and >= conditions to kill unwanted results.
I do it twice, from crv A to crrv B and from B to A to make sure I catch start and end generatrices each time.
The videos you posted are interesting. I don't understand how it works with just 2 slider to tune the curves.
…
e it would of course be amazing if these could be displayed in a Rhino window / baked as objects...). I use the BarGraph as a histogram constantly for exploring the data I generate as I'm designing - in fact the graph components are one of the most frequent components I use at the 'end' of my design process. Would be nice to add Titles to the graph/bargraph and labels to axes, as well as the feature requests Marc points out above.
Also wondered if the 'MD slider' would soon have a 3D option similar to the colour picker? Would be useful.
Of course many other graph types would come in quite handy (I often export my data to Excel in order to visualise better) - 2D scatter with the tree structure indicating different data sets and therefore different colour/point types on the graph (Excel-style) would be handy. Of course these could be created as Grasshopper objects and displayed in the viewport but I find the work needed to get to a presentable output this way is often too much and its faster for me to just look at the data in Excel. Also in the Rhino viewport you often want to be visualising the end result of your definition (i.e. geometry) and not have to zoom somewhere else or fiddle around to try to display a graph of values at the same time. I could imagine an 'output' control panel could be quite handy, where you drag and lock in the various text panels / graphs / etc which are useful to you and tell you information about your design as you are varying the input parameters. This could be outside of GH possibly and maybe linked to one side of the Rhino viewport.
Any thoughts? Of course some of these requests are asking Grasshopper to expand a bit more into the 'data display/interpretation' space - however I think this is extremely important as with each design I create there is most always associated data which tells me about its performance in some way or another and viewing that / illustrating it to clients in a quick and friendly way is key. Of course what is there already is most impressive and useful!
Cheers
Luke…
ng and algorithmic design for furniture production. Ideally I would like to be able to import a network of curves into this definition to automate the node creation process. Unfortunately as it stand it will only work for one of them.
My question is, how can I present a list of the connection points & vectors from a network of curves for this to work?
Below you can find the definition along with a few pictures of the concept and development. The white parts were modeled in Solidworks and printed on my Ultimaker 2.
If you're interested in following this project I'll be posting regular updates on my twitter: @pencil_stroke
Thanks in advance,
Charles
…
Added by Charles Fried at 12:32pm on February 5, 2015
tects to overcome the imposition of prefixed architectural forms in order to enhance performance-driven design and responsive kinetic solutions that interact with humans and environment. Lectures on parametric design simulation, generative and form finding as well as environmental optimization, analyzing and digital fabrication prototyping, are integrated together in 2 main modules. Students from the beginning of the school will be divided into groups to compete on a case project increasing their ability to define project parameters, design factors, solving problems, understanding factors relationships, involving environmental and human sensors, and optimizing their projects solutions in smart and inelegance way. In the beginning of the school, parametric modelling will be introduced (Rhino3d and Grasshopper) to build the necessary skills of parametric generative form methods to students. In this module will be dedicated to digital design methods and physical model making by various fabrication techniques, including laser cutting and 3D printing. Students will focus on the idea of creating algorithmic architectural form inspired by nature and their research will be supported by a series of lectures. Also they will be split into groups in order to develop projects assigned by the professors. This Module also adds Form Finding techniques to the parametric design strategies. Students will learn how material system behaviors, physical forces and responsive structure system can be digitally simulated into parametric models in order to explore complex forms that optimized and adapted to its natural behaviors, initial forces, material, particles, and structure systems. Series of lectures on form finding, natural structural algorithms, material behaviors, and physical forces will lead student to optimize their project forms. It is experimental laboratory in which kinetic interactive Architectural models are tested and designed. Students will develop novel solutions, building upon learning responsive kinetic systems. They will design Architectural responsive robotic systems inspired by nature. Projects will transform by adapting to environmental conditions and human behaviors happening at real and virtual levels.
…
ills and knowledge to work with cutting edge technologies in a fast-paced and intensive environment.
WORKSHOP TOPICS:
RESPONSIVE FACADES (GRASSHOPPER + FIREFLY + ARDUINO)
Jason Kelly Johnson (Future Cities Lab)
DESIGN SCRIPTING (RHINO3D + PYTHON)
Gil Akos (Mode Lab)
INTRO/INTERMEDIATE GRASSHOPPER
Andrew Kudless (MatSys)
HANDS-ON COMPOSITES
Bill Kreysler (Kreysler & Associates)
HANDS-ON 3D PRINTING (RHINO3D)
Ronnie Parsons (Mode Lab)
SCHEDULE
Early Bird Registration until June 12, 2013.
MORE INFORMATION
General Information
Workshop Registration…
s will learn to use these extensions in order to integrate numerous tools for analysis and simulation in the architectural process.
This course aims to develop a link between the virtual and the real context model through structural or environmental simulations, using other software or plug-ins dedicated. Through this link the virtual model receives physical properties that can further modify and adapt the initial model. This creates feedback loops that can optimize the design to provide an object responsive to environmental conditions.
Curriculum
Mesh subdivision with Weaverbird, continuous surfaces without NURBS
Genetic optimization with Galapagos, optimal search
Physical environment feedback with Diva and Geco, solar and day lighting analysis
Adding physical properties with Kangaroo Physics, interactive form-finding
Linking the parametric model with structural analysis using Karamba, structural performance simulation
Extracting data with Firefly and Kinect, 3D scanning and human movement tracking
Exchange of information between Grasshopper and other applications with Ghowl links to internet feeds or Excel files.
Schedule:
Module Grasshopper intermediate & advanced (24 h)
1 Nov – 15 Nov 2014
Sat:
9 - 13
14 - 18
Language: Romanian
Trainers:
Ionuț Anton, idz arhitectura (ART-Authorised Rhino Trainer)
Dana Tănase, idz arhitectura (ART-Authorised Rhino Trainer)
https://www.facebook.com/cursurigrasshopperrhinoceros
https://www.facebook.com/idzarhitectura
http://www.idz.ro/training/…
Added by Dana Tanase at 2:23am on February 2, 2014