Engineering the crack path in lattice cellular materials through bio-inspired micro-structural alterations

Manno, R.; Gao, W.

Risultato della ricerca: Article

Abstract

A computational study on the fracture behaviour of bio-inspired finite-size lattice configurations is performed in this work. The study draws inspiration from recent investigations aimed at increasing the fracture energy of some materials through small modifications of their microstructure. The main question here is whether it is possible, to some extent, to engineer the crack path in metallic cellular materials through such small micro-structural modifications and how to quantify the effect of alternative strategies. Nature provides several examples of strategies used to delay or arrest damage and crack propagation. One striking example is given by the micro-architecture of several kinds of wood, in which the crack propagation through a lignin cellular matrix is affected by density variations typical of the seasonal alternation between early-wood and late-wood and by the presence of sap channels. In this study, the effects on crack propagations induced by micro-structure alterations inspired by density variations and sap channels in wood are computationally investigated and some figures of merit are defined to assess the effect on the energy absorbed by alternative solutions. In an age in which tight control of the microarchitecture can be achieved, e.g. through high-resolution 3D printing, it is of interest to investigate whether, starting from a baseline cellular architecture, it is possible to achieve superior material performance by smart modifications of the microarchitecture.
Lingua originaleEnglish
pagine (da-a)8-17
Numero di pagine10
RivistaExtreme Mechanics Letters
Volume26
Stato di pubblicazionePublished - 2018

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Engineering (miscellaneous)
  • Chemical Engineering (miscellaneous)

Cita questo

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title = "Engineering the crack path in lattice cellular materials through bio-inspired micro-structural alterations",
abstract = "A computational study on the fracture behaviour of bio-inspired finite-size lattice configurations is performed in this work. The study draws inspiration from recent investigations aimed at increasing the fracture energy of some materials through small modifications of their microstructure. The main question here is whether it is possible, to some extent, to engineer the crack path in metallic cellular materials through such small micro-structural modifications and how to quantify the effect of alternative strategies. Nature provides several examples of strategies used to delay or arrest damage and crack propagation. One striking example is given by the micro-architecture of several kinds of wood, in which the crack propagation through a lignin cellular matrix is affected by density variations typical of the seasonal alternation between early-wood and late-wood and by the presence of sap channels. In this study, the effects on crack propagations induced by micro-structure alterations inspired by density variations and sap channels in wood are computationally investigated and some figures of merit are defined to assess the effect on the energy absorbed by alternative solutions. In an age in which tight control of the microarchitecture can be achieved, e.g. through high-resolution 3D printing, it is of interest to investigate whether, starting from a baseline cellular architecture, it is possible to achieve superior material performance by smart modifications of the microarchitecture.",
author = "{Manno, R.; Gao, W.} and Ivano Benedetti",
year = "2018",
language = "English",
volume = "26",
pages = "8--17",
journal = "Extreme Mechanics Letters",
issn = "2352-4316",
publisher = "Elsevier Limited",

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TY - JOUR

T1 - Engineering the crack path in lattice cellular materials through bio-inspired micro-structural alterations

AU - Manno, R.; Gao, W.

AU - Benedetti, Ivano

PY - 2018

Y1 - 2018

N2 - A computational study on the fracture behaviour of bio-inspired finite-size lattice configurations is performed in this work. The study draws inspiration from recent investigations aimed at increasing the fracture energy of some materials through small modifications of their microstructure. The main question here is whether it is possible, to some extent, to engineer the crack path in metallic cellular materials through such small micro-structural modifications and how to quantify the effect of alternative strategies. Nature provides several examples of strategies used to delay or arrest damage and crack propagation. One striking example is given by the micro-architecture of several kinds of wood, in which the crack propagation through a lignin cellular matrix is affected by density variations typical of the seasonal alternation between early-wood and late-wood and by the presence of sap channels. In this study, the effects on crack propagations induced by micro-structure alterations inspired by density variations and sap channels in wood are computationally investigated and some figures of merit are defined to assess the effect on the energy absorbed by alternative solutions. In an age in which tight control of the microarchitecture can be achieved, e.g. through high-resolution 3D printing, it is of interest to investigate whether, starting from a baseline cellular architecture, it is possible to achieve superior material performance by smart modifications of the microarchitecture.

AB - A computational study on the fracture behaviour of bio-inspired finite-size lattice configurations is performed in this work. The study draws inspiration from recent investigations aimed at increasing the fracture energy of some materials through small modifications of their microstructure. The main question here is whether it is possible, to some extent, to engineer the crack path in metallic cellular materials through such small micro-structural modifications and how to quantify the effect of alternative strategies. Nature provides several examples of strategies used to delay or arrest damage and crack propagation. One striking example is given by the micro-architecture of several kinds of wood, in which the crack propagation through a lignin cellular matrix is affected by density variations typical of the seasonal alternation between early-wood and late-wood and by the presence of sap channels. In this study, the effects on crack propagations induced by micro-structure alterations inspired by density variations and sap channels in wood are computationally investigated and some figures of merit are defined to assess the effect on the energy absorbed by alternative solutions. In an age in which tight control of the microarchitecture can be achieved, e.g. through high-resolution 3D printing, it is of interest to investigate whether, starting from a baseline cellular architecture, it is possible to achieve superior material performance by smart modifications of the microarchitecture.

UR - http://hdl.handle.net/10447/326658

UR - https://www.sciencedirect.com/science/article/pii/S2352431618301627

M3 - Article

VL - 26

SP - 8

EP - 17

JO - Extreme Mechanics Letters

JF - Extreme Mechanics Letters

SN - 2352-4316

ER -