FlexiStiff: A Variable Tensile Stiffness Element for Modulating the Behavior of Tensegrity Structures

张拉整体 材料科学 极限抗拉强度 结构工程 刚度 复合材料 要素(刑法) 有限元法 工程类 政治学 法学
作者
Vaqas Arshad,Babar Jamil,Hugo Rodrigue
出处
期刊:Advanced Engineering Materials [Wiley]
标识
DOI:10.1002/adem.202400497
摘要

Soft and tensegrity structures are two configurations that have appeared as robots continue to draw inspiration from nature and diversify beyond rigid machines towards compliant systems. One artificial manifestation of a biological attribute that is an active research topic is the body’s capacity to calibrate its stiffness for adapting its behavior to a given task. This study brings together these designs spaces and presents a soft tensile element named FlexiStiff for tensegrity structures to enable transitioning between flexible and stiff states for variable load‐bearing capability and compliance. The device’s tensile stiffness constant can be increased by 4400% with a change in pressure. It can provide a high blocking force of 535.5 N and can endure elongation up to approximately 184%. It is conveniently assembled using four commercially available materials and a two‐step fabrication method consisting of 3D printing and elastomer curing. As opposed to classical tensegrities for which shape change is inexpensive in terms of energy, this work betokens a new stage in their design wherein the arrangement can radically alter the magnitude of its demand for external energy for shape morphing, a crucial characteristic for operation in partially mapped environments that present diverse terrains and disturbances of varying intensities prompting adaptability. This article is protected by copyright. All rights reserved.
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