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Press Release 040/2017

Vortexes as Wheels of Nature

Biomechanics Expert Claus Mattheck Transfers Universal Forms of Trees to Technical Components
2017_040_Wirbel als Raeder der Natur_72dpi
Vortex underneath the bark: By vortex formation, trees can limit shear deformation and stabilize themselves. (Photo and drawing: Claus Mattheck/KIT)

Using nature as a model, technical components can be optimized. At Karlsruhe Institute of Technology (KIT), biomechanics expert Professor Claus Mattheck has developed computer-aided methods and purely graphical tools to design lightweight and long-lived components. The researcher found that a universal form exists in nature. It can be reproduced with simple geometrical methods. Deformation by vortexes, called “the wheels of nature” by Mattheck, ensures internal optimization.

 

“Evolution is like a hard design competition. Objects that are too heavy or not strong enough do not survive,” Professor Claus Mattheck says. “Optimal forms and shapes prevail.” Technical components designed in line with nature have an optimal shape and a high stability and material and energy efficiency, the scientist points out. For more than three decades, Mattheck has developed various computer-aided methods and simplifying computer-free thinking tools, such as shear quadrangles, tension triangles, and force cones, to analyze structures and optimize shapes. At the Materials and Biomechanics Division of KIT’s Institute for Applied Materials (IAM-WBM), Mattheck studied how trees develop and repair themselves at weak points by load-driven addition of wood. From this, he derived principles for optimization of components.

 

Claus Mattheck found that there is a universal form in nature that can be found not only in solids, but also in fluids. It appears in mountains as well as in trees or bones. By deformation, it can even generate itself to counteract a specific load – Mattheck speaks of “winning by yielding.” This universal form has also entered the industrial world. It is part of the DIN ISO 18459 standard (bionics – bionic structure optimization).

 

Apart from external shape optimization, the bionics expert also observes internal optimization by deformation. External design aims for a homogeneous distribution of tensile and compressive stresses on the surface according to Mattheck’s “axiom of constant stress.” Internal deformation by the formation of vortexes serves to limit shear deformation, i.e. sliding of adjacent, interconnected surfaces. In this way, shear is delayed. “These vortexes may be referred to as the wheels of nature,” Professor Mattheck says.

 

It has been known for a long time that stratified fluid flows roll around a body, as if they were located on a conveyor belt. In solid bodies, vortexes make very small roll movements, but they still exist and can be detected in the dead wood of debarked trees, for instance. This principle can also be transferred to technical components.

 

In his new book “Die Körpersprache der Bauteile – Enzyklopädie der Formfindung nach der Natur“ (The Body Language of Components – Encyclopedia of Form Finding in Line with Nature), Claus Mattheck summarizes these findings in a generally understandable and clear manner. The text is illustrated by a number of figures.

 


Title page of the book “Die Körpersprache der Bauteile“ by Claus Mattheck.

 

Being „The Research University in the Helmholtz Association“, KIT creates and imparts knowledge for the society and the environment. It is the objective to make significant contributions to the global challenges in the fields of energy, mobility and information. For this, about 9,300 employees cooperate in a broad range of disciplines in natural sciences, engineering sciences, economics, and the humanities and social sciences. KIT prepares its 26,000 students for responsible tasks in society, industry, and science by offering research-based study programs. Innovation efforts at KIT build a bridge between important scientific findings and their application for the benefit of society, economic prosperity, and the preservation of our natural basis of life.

or, 28.03.2017

For further information, please contact:

Inge Arnold
Gesamtkommunikation
Tel.: +49 721 608-22861
E-Mail: Inge arnoldEmo7∂kit edu
The photo of printing quality may be requested by presseTcs6∂kit edu or phone: +49 721 608-47414. The press release is available as a PDF file.