Abstract: An origami design method based on topology optimization is introduced. The design of a folding pattern is cast as a problem of assigning presence and type of fold to lines in a “ground structure,â€‌ using folding angles ...

Abstract: We have studied a nonlinear springmass chain loaded by a quasistatic pull. The spring forces are assumed to be cubic with intervals of negative stiffness. Depending on the parameters, the system has multiple equilibria. ...

Abstract: This work regards the use of cubic springs with intervals of negative stiffness, in other words, “snapthroughâ€‌ elements, in order to convert lowfrequency ambient vibrations into highfrequency oscillations, referred to ...

Abstract: A simple nonlinear undamped Duffing oscillator has been studied for its snapthrough behavior at largeamplitude vibrations. We present an algorithm that uses the harmonic balance (HB) method to find amplitude and frequency ...