Description
We probe the buckling of elastic metabeams by means of experiments and simulations. We show that sufficiently wide elastic plain beams exhibit snap through buckling, an unstable form of buckling where the stiffness is negative. We demonstrate that wider beams experience stronger nonlinear deformations and geometric stiffening. Therefore, the distribution of stresses across the beam is distorted and the postbuckling behavior altered. In a second part, we tailor a strain-softening nonlinearity in the material by designing an ordered microstructure close to a pattern transformation, in such a way that we can rationally design the postbuckling behavior of arbitrarily thin beams.
Recommended Citation
Coulais, C., Florijn, B., de Reus, K., & van Hecke (2014). Tunable buckling of metabeams. In A. Bajaj, P. Zavattieri, M. Koslowski, & T. Siegmund (Eds.). Proceedings of the Society of Engineering Science 51st Annual Technical Meeting, October 1-3, 2014 , West Lafayette: Purdue University Libraries Scholarly Publishing Services, 2014. https://docs.lib.purdue.edu/ses2014/mss/ssm/24
Tunable buckling of metabeams
We probe the buckling of elastic metabeams by means of experiments and simulations. We show that sufficiently wide elastic plain beams exhibit snap through buckling, an unstable form of buckling where the stiffness is negative. We demonstrate that wider beams experience stronger nonlinear deformations and geometric stiffening. Therefore, the distribution of stresses across the beam is distorted and the postbuckling behavior altered. In a second part, we tailor a strain-softening nonlinearity in the material by designing an ordered microstructure close to a pattern transformation, in such a way that we can rationally design the postbuckling behavior of arbitrarily thin beams.