Bethge, K.

Mattheck, C.

Weber, K.

English

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Institute for Applied MaterialsHermann-von-Helmholtz-Platz 1D- 76344 Eggenstein-LeopoldshafenGermanywww.kit.eduA New Kind of Cracks in London Plane Trees C. Mattheck, K. Bethge, K. Weber22.09.2014Result: Localized higher circumferential curvature on top and bottom of branch cross-section indicate much growth, much growth stresses, resulting in vertical tensile stresses. Again, it seems to be vigour causing failure modes similar to brittle heart in tropical trees or end splitting of sawn trees.What is the cause? Plugs expanding holes in a ovalized rubber plate, simulating circumferential compressive growth stresses, explain formation of cracks along wood rays.Longitudinal cracks in straight and only slightly curved branches are reported from arborists in Heidelberg. We thank Uwe von Taschitzki and Wolfgang Morr for their stimulation of this research.If branches are ovalized by formation of tension or supporting wood, the radial component of circumferential compressive growth stresses might be one reason for crack formation.

A new kind of cracks in London plane trees

https://publikationen.bibliothek.kit.edu/220097322/3816636

A new kind of cracks in London plane trees

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