Damage propagation in 2d beam lattices: 2. Design of an isotropic fault-tolerant lattice

Andrej Cherkaev*, Michael Ryvkin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The paper demonstrates a rational design of an isotropic heterogeneous beam lattice that is fault-tolerant and energy-absorbing. Combining triangular and hexagonal structures, we calculate elastic moduli of obtained hybrid heterogeneous structures; simulate the development of flaws in that composite lattice subjected to a uniform uniaxial deformation; investigate its damage evolution; measure various characteristics of damage that estimate fault tolerance; discuss the trade-off between stiffness and fault tolerance. A design is found that develops a cloud of small evenly spread flaws instead of a crack.

Original languageEnglish
Pages (from-to)503-519
Number of pages17
JournalArchive of Applied Mechanics
Volume89
Issue number3
DOIs
StatePublished - 15 Mar 2019

Keywords

  • Beam lattice
  • Brittle fracture
  • Evenly spread damage
  • Fault-tolerant lattice

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