Matthias Pliessnig

www.matthias-studio.com

The projects on this website are interesting because they show how non-linear forms can be made from wood... using the material for rigid structural ribs and also skin. I am not sure about the process that this designer uses... and it may be different from ours, but thought the forms were inspiring.

to cancel bending stress & joint

I and Abe talked about the design on skype.
It may be better solution to join 2 different sin curve for canceling bending stress.
Joint of 2 sin curve is finger joint.

This is a joint as key to connect 2 sin curve.

It is put a slit of board of sin curve.

Next, it is twisted to tie the boards. 

However, it will not transform...

So, It should be unitized and connect as sliding system of joint.

Splinter Concept

My apologies for not posting this earlier, but here is my conceptual design.

Material Testing

Here are some photos of the material testing I completed. The photos of the bending were taken at the maximum amound of curvature before the material failed. The photos of the twisting show the maximum amount of torque I could exert on the material, but I believe the material was close to failure. Please let me know if there are any other specific tests that would be helpful.

Material:

5mm Lauan Plywood 1m in length at various widths (50mm, 75mm, 100mm). This was the only Lauan plywood I could find. The material was labelled as 5.2mm but also 1/4" which is 6.35mm, however it measured 5mm. The material was cut so that the grain of the outer layers ran legthwise along the piece of material (parallel to bending force)

Conclusions:

- maximum bending does not change with width of material.

- maximum twisting is inversly related to width of the material (the narrower material twisted the most). The max twisting decreased more when the width of the material increased (50mm - 75mm = -30 degrees, 75mm-100mm = -60 degrees), meaning that a smaller increase of width has a greater effect on max twisting as the width increases.

Notes:

- Due to material imperfections and the nature of the wood, rate of bending along the length of the material was sometimes not constant, creating an uneven curve. Also, this caused the material to sometimes fail unexpectedly at lower levels of stress

- The maximum bending was most easily acheived after 'warming up' the material by flexing it several times at lower levels of stress. I believe this can be attributed to breaking the bonds between layers and the rigidness of the wood grains (in the inner layer)

- Due to the the length of the clamp holding the material, the effective length being twisted was 820mm. However, I would assume that one would not want to use the material under maximum stress in the project, so perhaps using the same amount of torque at the 1m length would provide an adequate safety factor.

Dear teamD members,

I'm sorry for not uploarding my idea until the deadline.
Your ideas are very interesting and I agree the shape or the system of the transforming.
Then,I've thought of the concept of the teahouse that we will make.I think we have to image some point of our teahouse, and Iwrote them in the image.
I think the teahouse should be the place where enjoy the tense, the owner could be accepted anybody,and the using purpose is sharing just the silent time,without talking,and feel something from the place or the air.

Besides,when the teahouse transformed to something, is it a teahouse, or something different?If it is a teahouse, is the concept or way of using different?

How do you think about them?
I look forward to have some discussion with you.

thank you,

saki

morphing cage

Flexibility and handling ability are important factors about tea house as window, entrance and set of tea-things. 

The tea hosue is weaved like bamboo bag. Each joint is slide system, so we can morph surface to loose each bolt on joints. 

If we morph top of the surface down, the tea house become more closely.

We enter inside to move boards as  opening “Nijiriguchi”.

I didn't test material yet, next I will test bending.

If I can't bend plywood, I will cut a gash as I have shown you my previous work of teahouse.

I would like to see your works soon.

Please comment my idea, I want to discuss with you.

Thank you.

Plywood characteristics and two joints

About the material testing, unfortunately I’m not able to do this because where I am is not available plywood 6 mm thickness. But I found a table that shown some plywood’s mechanical characteristics at this link:

http://www.worldpanel.com/Plywood%20Data1.pdf

Also I thought about the connection between the pieces, and I made two examples that eventually they might be joined each other.

The first image is referred to an orthogonal joint:

The second one is referred to a joint along a longitudinal axis: