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Keywords: instability, large deflections, pressure load, simulations, parameter dependence, wrinkling.

Abstract

Many classes of optimized structures can exhibit instability phenomena, related to large displacements, material effects, loading or contact conditions. Numerical treatment of these structures requires sophisticated simulation algorithms for the evaluation and interpretation of instabilities. This paper will discuss methods for such simulations, in a general finite element-based context. The paper will use as its main example the response of thin closed membranes to applied pressure loads, from gas or fluid. The special aspects of displacement-dependent loading on a flexible structure will be discussed, as will their consequences for stability conclusions. The main results will be formulated on how the stability conclusions depend on what is considered as the control variable for the load, where, for instance, gas pressure and injected gas amount will give different conclusions for balloon-like structures. Aspects will be given on the direct and indirect stability effects from wrinkling in the thin membrane material, and from contacts with external surfaces. Some aspects are given on how these effects can be described in the simulations.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Computational Science, Engineering & Technology Series ISSN 1759-3158 CSETS: 38 COMPUTATIONAL TECHNIQUES FOR CIVIL AND STRUCTURAL ENGINEERING Edited by: J. Kruis, Y. Tsompanakis and B.H.V. Topping Chapter 10 Stability Investigations for Pressurized Membranes and other Optimized Structures A. Eriksson KTH Mechanics, Royal Institute of Technology, Stockholm, Sweden doi:10.4203/csets.38.10 purchase the full-text of this chapter Full Bibliographic Reference for this chapter A. Eriksson, "Stability Investigations for Pressurized Membranes and other Optimized Structures", in J. Kruis, Y. Tsompanakis and B.H.V. Topping, (Editors), "Computational Techniques for Civil and Structural Engineering", Saxe-Coburg Publications, Stirlingshire, UK, Chapter 10, pp 233-254, 2015. doi:10.4203/csets.38.10 Keywords: instability, large deflections, pressure load, simulations, parameter dependence, wrinkling. Abstract Many classes of optimized structures can exhibit instability phenomena, related to large displacements, material effects, loading or contact conditions. Numerical treatment of these structures requires sophisticated simulation algorithms for the evaluation and interpretation of instabilities. This paper will discuss methods for such simulations, in a general finite element-based context. The paper will use as its main example the response of thin closed membranes to applied pressure loads, from gas or fluid. The special aspects of displacement-dependent loading on a flexible structure will be discussed, as will their consequences for stability conclusions. The main results will be formulated on how the stability conclusions depend on what is considered as the control variable for the load, where, for instance, gas pressure and injected gas amount will give different conclusions for balloon-like structures. Aspects will be given on the direct and indirect stability effects from wrinkling in the thin membrane material, and from contacts with external surfaces. Some aspects are given on how these effects can be described in the simulations. purchase the full-text of this chapter (price £20) go to the previous chapter go to the next chapter return to the table of contents return to the book description purchase this book (price £95 +P&P)
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