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This and the next 3 slides are from:
Babak Haghpanah, Jim Papadopoulos, Davood Mousanezhad, Hamid Nayeb-Hashemi and Ashkan Vaziri (Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA, USA),
“Buckling of regular, chiral and hierarchical honeycombs under a general macroscopic stress state”, Proc. R. Soc. A 2014 470, 20130856, published 14 May 2014
ABSTRACT: An approach to obtain analytical closed-form expressions for the macroscopic ‘buckling strength’ of various two-dimensional cellular structures is presented. The method is based on classical beam-column end-moment behaviour expressed in a matrix form. It is applied to sample honeycombs with square, triangular and hexagonal unit cells to determine their buckling strength under a general macroscopic in-plane stress state. The results were verified using finite-element Eigenvalue analysis.
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