Dynamic crushing of double-arrowed auxetic structure under impact loading. (15th December 2018)

• Record Type: Journal Article
• Authors: Zhao, Xuan; Gao, Qiang; Wang, Liangmo; Yu, Qiang; Ma, Z.D.
• Is Part Of: Materials & design. Volume 160(2018)
• Page Start: 527
• Page End: 537
• Publication Date: 2018-12-15
• Subjects: Double-arrowed auxetic structure -- Negative Poisson's ratio -- Deformation behavior -- Dynamic crushing strength; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2018.09.041
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: Double-arrowed auxetic (DAA) structures with a negative Poisson's ratio have recently drawn increasing attention. This paper deduces the empirical formula of critical impact velocity to characterize the deformation modes of the DAA structures in two in-plane directions. A method is proposed to construct a theoretical model for predicting the dynamic crushing strength of DAA structure. The theoretical model is validated by numerical results to be sufficiently accurate to predict the dynamic crushing strength. It is also found that the dynamic crushing strength is only related to the relative density and impact velocity. Graphical abstract: Highlights: An empirical formula of critical impact velocity is deduced. A theoretical model is proposed to predict the dynamic crushing strength. Theoretical predictions are validated by numerical results.