Shape Control for Experimental Continuation

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An experimental method has been developed to locate unstable equilibria of nonlinear structures quasistatically. The technique involves loading a structure by the application of either a force or a displacement at a main actuation point while simultaneously controlling the overall shape using additional bidirectional probe points. The method is applied to a shallow arch, and unstable segments of its equilibrium path are identified experimentally for the first time. Shape control is a fundamental building block for the experimental - as opposed to numerical - continuation of nonlinear structures, which will significantly expand our ability to measure their mechanical response.

Original languageEnglish
Article number254101
Number of pages5
JournalPhysical Review Letters
Issue number25
Early online date21 Jun 2018
Publication statusPublished - 21 Jun 2018


  • cond-mat.soft


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