Rotating Squares

Grima’s “rotating squares” when first presented as a model for achieving auxetic behaviour at the RSC 4th International Materials Conference (MC4), Dublin, Ireland in July 1999. [Ref: Grima, J. N., Alderson, A. & Evans, K. E. 1999 Zeolites with negative Poisson’s ratios. In RSC. 4th Int. Materials Conf. (MC4), Dublin, Ireland, P81]

^{PS: The little boy, James N. Grima-Cornish, has since grown and authored a number of papers himself.}