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Imperfect architected materials: Mechanics and topology optimization

Published online by Cambridge University Press:  10 October 2019

Damiano Pasini
Affiliation:
McGill University, Canada; damiano.pasini@mcgill.ca
James K. Guest
Affiliation:
Johns Hopkins University, USA; jkguest@jhu.edu
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Abstract

This article examines two intertwined topics on architected materials with imperfections—their mechanics and optimum design. We first discuss the main factors that control defect sensitivity along with a range of strategies for defect characterization. The potency of both as-designed and as-manufactured defects on their macroscopic response is highlighted with an emphasis on those caused by additive manufacturing technology. As a natural extension of defect sensitivity, we describe the design approaches for architected materials with particular focus on systematic tools of topology optimization. Recent extensions to formally incorporate imperfections in the optimization formulation are discussed, where the ultimate goal is to generate architectures that are flaw-tolerant and perform robustly in the presence of imperfections. We conclude with an outlook on the field, highlighting potential areas of future research.

Type
Three-Dimensional Architected Materials and Structures
Copyright
Copyright © Materials Research Society 2019 

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