Tensegrity of Structure (Bridge Structure)


EOI: 10.11242/viva-tech.01.05.001

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Citation

Prof. Akshay Mistry1, Yash Paithankar2, Manav Sheth3, Vedant Nashiba4 , "Tensegrity of Structure (Bridge Structure) ", VIVA-IJRI Volume 1, Issue 7, Article 1, pp. 1-7, 2024. Published by Civil Engineering Department, VIVA Institute of Technology, Virar, India.

Abstract

Due to the complex structure of tensegrity systems it is often hard to understand their behaviour and estimate their mechanical properties. As a result, they are rarely used in real engineering applications. The present pa-per focuses on the evaluation of equivalent mechanical properties of various tensegrity modules based on a con- tinuum model. The aim of the applied model is to facilitate the identification and understanding of me-chanical characteristics of tensegrities through their comparison with a continuum body with equivalent fea-tures. The model is built by assuming that the strain energy of an unsupported tensegrity module or structure is equivalent to the strain energy of a solid. The approach enables to estimate the influence of self-stress on de-formation of the structure, identify the influence of cables and struts on the properties of the whole system, determine equivalent mechanical characteristics, such as Young’s moduli, shear moduli, Poisson’s ratios etc., and conditions that limit their values. What is more, a qualitative as well as quantitative evaluation and com-parison of mechanical properties for various tensegrity modules and systems is possible with the use of the applied technique. A comprehensive analysis of typical tensegrity modules with various elastic symmetries is presented. Using the adopted model, mechanical characteristics are determined and graphs of identified me-chanical coefficients for five typical tensegrity modules are presented in relation to the self-stress multiplier and cable to strut properties ratio. The analysis can be useful for the development of extreme mechanical prop-erties of smart tensegrity- inspired 2D or 3D lattices or metamaterials. Tensegrity Structures consist of strings (in tension) and bars (in compression). Strings are strong, light, and foldable, so Structures have the potential to be light but strong and deployable. pulleys, Nitti wire, or other actuators to selectively tighten some strings on a tensegrity structure can be used to control its shape. This article describes some principles we have found to be true in a detailed study of mathematical models of several tensegrity structures. We describe properties of these structures which hold quite generally. We describe how pretending all strings of a tense pity makes its shape robust to various loading forces. Another property asserts that the shape of a tensegrity structure can be changed substantially with little change in the potential energy of the structure. Thus shape control should be in expensive. This is in contrast to the control of classical structures which require substantial energy to change their shape.

Keywords

Comprehensive analysis, Lattices. Mechanical characteristics, Tensegrity.

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