The flexural mechanics of creased thin strips

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:167

Article

Walker, M. G.^1,2  Seffen, K. A.¹ 

[1] Univ Cambridge, Engn Dept, Trumpington St, Cambridge CB2 1PZ, England

[2] Univ Oxford, Dept Engn Sci, Parks Rd, Oxford OX1 3PJ, England

关键词: Creasing;    Folding;    Shell structures;    Tape-spring;   

DOI  :  10.1016/j.ijsolstr.2019.03.016

来源: Elsevier

【 摘 要 】

Many structures in Nature and Engineering are dominated by the influence of folds. A very narrow fold is a crease, which may be treated with infinitesimal width for a relatively simple geometry; commensurately, it operates as a singular hinge line with torsional elastic properties. However, real creases have a finite width and thus continuous structural properties. We therefore consider the influence of the crease geometry on the large-displacement flexural behaviour of a thin creased strip. First, we model the crease as a shallow cylindrical segment connected to initially flat side panels. We develop a theoretical model of their coupled flexural behaviour and, by adjusting the relative panel size, we capture responses from a nearly singular crease up to a full tape-spring. Precise experiments show good agreement compared to predictions. (C) 2019 Elsevier Ltd. All rights reserved.

【 授权许可】

Free