On the elastic stability of folded rings in circular and straight states

On the elastic stability of folded rings in circular and straight states
复制标题

折叠环在圆状态和直状态下的弹性稳定性

DOI:
10.1016/j.euromechsol.2023.105041
复制
发表时间:
2023
期刊:
European Journal of Mechanics - A/Solids
影响因子:
--
通讯作者:
Hutchinson, John W.
Hutchinson, John W.
中科院分区:
--
文献类型:
--
作者:
Leanza, Sophie;Zhao, Ruike Renee;Hutchinson, John W.

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单环弹性环可以折叠成多环平衡构型。在本文中,几个这样的多回路状态,无论是圆形或直的稳定性进行了研究分析和说明的实验演示。该分析通过探索在平衡状态附近允许变形的环的弹性能的变化来确定稳定性。所采用的方法是传统的稳定性分析的弹性保守系统的基础上的第二变化的系统能量,这不同于大多数的分析,已公布的这类问题,将说明通过复制和阐述在文献中的几个问题。除了提供两个基本问题的解决方案,本文分析和证明的稳定性,六边环,曲边的六边形,折叠成直的配置。
Single-loop elastic rings can be folded into multi-loop equilibrium configurations. In this paper, the stability of several such multi-loop states which are either circular or straight are investigated analytically and illustrated by experimental demonstrations. The analysis ascertains stability by exploring variations of the elastic energy of the rings for admissible deformations in the vicinity of the equilibrium state. The approach employed is the conventional stability analysis for elastic conservative systems based on the second variation of the system energy which differs from most of the analyses that have been published on this class of problems, as will be illustrated by reproducing and elaborating on several problems in the literature. In addition to providing solutions to two basic problems, the paper analyses and demonstrates the stability of six-sided rings, curved-sided hexagrams, that fold into straight configurations.
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