Enhancing toughness through geometric control of the process zone

Sage  Fulco; Michal Kazimierz Budzik; Kevin T.   T. Turner

doi:10.1016/j.jmps.2024.105548

Enhancing toughness through geometric control of the process zone

Sage Fulco , Michal Kazimierz Budzik^*, Kevin T. T. Turner ^*

^*Corresponding author for this work

Department of Mechanical and Production Engineering - Mechanics and Materials

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Abstract

Material architecture provides an opportunity to alter and control the fracture process zone shape and volume by redistributing the local stresses at a crack tip. Properly designed structures can enlarge the plastic zone and enhance the effective toughness. Here, we use a pillar array as a model structure to demonstrate how variations in geometry at a crack tip control the size and shape of the plastic zone and can be used to engineer the effective toughness. Elastic–plastic finite element simulations are used to quantify how the pillar width, spacing, and height can be varied to tailor the size and shape of the plastic zone. A set of analytical mechanics models that accurately estimate the shape, volume, and resulting toughness as a function of the base material properties and geometry are also presented. A case study extends the analysis to sets of non-regular pillar arrays to illustrate how architecture can be used to alter toughness along the crack path.

Original language	English
Article number	105548
Journal	Journal of the Mechanics and Physics of Solids
Volume	184
Number of pages	24
ISSN	0022-5096
DOIs	https://doi.org/10.1016/j.jmps.2024.105548
Publication status	Published - Mar 2024

Keywords

Architected materials
Finite element analysis
Plasticity
Toughness

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Cite this

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title = "Enhancing toughness through geometric control of the process zone",

abstract = "Material architecture provides an opportunity to alter and control the fracture process zone shape and volume by redistributing the local stresses at a crack tip. Properly designed structures can enlarge the plastic zone and enhance the effective toughness. Here, we use a pillar array as a model structure to demonstrate how variations in geometry at a crack tip control the size and shape of the plastic zone and can be used to engineer the effective toughness. Elastic–plastic finite element simulations are used to quantify how the pillar width, spacing, and height can be varied to tailor the size and shape of the plastic zone. A set of analytical mechanics models that accurately estimate the shape, volume, and resulting toughness as a function of the base material properties and geometry are also presented. A case study extends the analysis to sets of non-regular pillar arrays to illustrate how architecture can be used to alter toughness along the crack path.",

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author = "Sage Fulco and Budzik, {Michal Kazimierz} and {T. Turner}, {Kevin T.}",

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doi = "10.1016/j.jmps.2024.105548",

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T1 - Enhancing toughness through geometric control of the process zone

AU - Fulco , Sage

AU - Budzik, Michal Kazimierz

AU - T. Turner , Kevin T.

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N2 - Material architecture provides an opportunity to alter and control the fracture process zone shape and volume by redistributing the local stresses at a crack tip. Properly designed structures can enlarge the plastic zone and enhance the effective toughness. Here, we use a pillar array as a model structure to demonstrate how variations in geometry at a crack tip control the size and shape of the plastic zone and can be used to engineer the effective toughness. Elastic–plastic finite element simulations are used to quantify how the pillar width, spacing, and height can be varied to tailor the size and shape of the plastic zone. A set of analytical mechanics models that accurately estimate the shape, volume, and resulting toughness as a function of the base material properties and geometry are also presented. A case study extends the analysis to sets of non-regular pillar arrays to illustrate how architecture can be used to alter toughness along the crack path.

AB - Material architecture provides an opportunity to alter and control the fracture process zone shape and volume by redistributing the local stresses at a crack tip. Properly designed structures can enlarge the plastic zone and enhance the effective toughness. Here, we use a pillar array as a model structure to demonstrate how variations in geometry at a crack tip control the size and shape of the plastic zone and can be used to engineer the effective toughness. Elastic–plastic finite element simulations are used to quantify how the pillar width, spacing, and height can be varied to tailor the size and shape of the plastic zone. A set of analytical mechanics models that accurately estimate the shape, volume, and resulting toughness as a function of the base material properties and geometry are also presented. A case study extends the analysis to sets of non-regular pillar arrays to illustrate how architecture can be used to alter toughness along the crack path.

KW - Architected materials

KW - Finite element analysis

KW - Plasticity

KW - Toughness

U2 - 10.1016/j.jmps.2024.105548

DO - 10.1016/j.jmps.2024.105548

M3 - Journal article

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JO - Journal of the Mechanics and Physics of Solids

JF - Journal of the Mechanics and Physics of Solids

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ER -

Enhancing toughness through geometric control of the process zone

Abstract

Keywords

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