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Published October 16, 2023 | Accepted
Journal Article Open

Control of Mechanical and Fracture Properties in Two‐Phase Materials Reinforced by Continuous, Irregular Networks

  • 1. ROR icon California Institute of Technology


Composites with high strength and high fracture resistance are desirable for structural and protective applications. Most composites, however, suffer from poor damage tolerance and are prone to unpredictable fractures. Understanding the behavior of materials with an irregular reinforcement phase offers fundamental guidelines for tailoring their performance. Here, we study the fracture nucleation and propagation in two phase composites, as a function of the topology of their irregular microstructures. We use a stochastic algorithm to design the polymeric reinforcing network, achieving independent control of topology and geometry of the microstructure. By tuning the local connectivity of isodense tiles and their assembly into larger structures, we tailor the mechanical and fracture properties of the architected composites, at the local and global scale. Finally, combining different reinforcing networks into a spatially determined meso‐scale assembly, we demonstrate how the spatial propagation of fractures in architected composite materials can be designed and controlled a priori.This article is protected by copyright. All rights reserved

Copyright and License

© 2023 Wiley VCH.


The authors thank P. Arakelian, K. Liu, T. Zhou, C. McMahan, and J. Boddapati for the fruitful discussions. The authors acknowledge MURI ARO W911NF-21-S-0008 for the financial support. T.M. acknowledges the Swiss National Science Foundation for the financial support.


Advanced Materials - 2023 - Magrini - Control of Mechanical and Fracture Properties in Two‐Phase Materials Reinforced by.pdf

Additional details

October 30, 2023
October 30, 2023