Open AccessBlowing in the Wind: Storm-Resisting Features of the Design of Trees
Author(s) -
Steven Vogel
Publication year - 1996
Publication title -
arboriculture and urban forestry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.222
H-Index - 47
eISSN - 2155-0778
pISSN - 1935-5297
DOI - 10.48044/jauf.1996.013
Subject(s) - drag , storm , bending moment , control reconfiguration , pursuer , moment (physics) , cluster (spacecraft) , meteorology , computer science , geology , mathematics , mechanics , structural engineering , engineering , physics , classical mechanics , mathematical optimization , embedded system , programming language
Many of the features of trees represent arrangements that minimize the chance that they will uproot when exposed to high winds. At least four schemes, singly or in combination, keep the bases of trees from rotating in the face of the turning moment imposed by the drag of their leaves. Trunks and petioles are relatively more resistant to bending than to twisting, giving good support but permitting drag-reducing reconfiguration in high winds. Leaves curl and cluster in a variety of ways, all of which greatly reduce the drag they incur relative to the values for ordinary thin and flexible objects such as flags. However, information derived from measurement and experimentation about such mechanical matters is still quite limited.