Full field measurements of anisotropic stress intensity factor ranges in fatigue

Garrett J. Pataky; Michael D. Sangid; Huseyin Sehitoglu; Reginald F. Hamilton; Hans J. Maier; Petros Sofronis

doi:10.1016/j.engfracmech.2012.06.002

Full field measurements of anisotropic stress intensity factor ranges in fatigue

Garrett J. Pataky, Michael D. Sangid, Huseyin Sehitoglu, Reginald F. Hamilton, Hans J. Maier, Petros Sofronis

Research output: Contribution to journal › Article › peer-review

Abstract

The effects of anisotropy during mixed mode fatigue crack growth were studied in single crystal 316L stainless steel. An anisotropic least-squares regression algorithm using displacements from digital image correlation was developed to find the effective stress intensity factors, K _I and K _II, and the T-stress. Crack tip plastic zones were determined using an anisotropic yield criterion. Strains in the plastic zone obtained from digital image correlation showed a dependence on the crystallography and load ratio. Crack tip slip irreversibility was measured and showed an increasing trend with increasing crack length; this information is critical for describing crack growth behavior.

Original language	English (US)
Pages (from-to)	13-28
Number of pages	16
Journal	Engineering Fracture Mechanics
Volume	94
DOIs	https://doi.org/10.1016/j.engfracmech.2012.06.002
State	Published - Nov 2012

Keywords

Effective stress intensity factor
Fatigue crack growth
Mixed mode fracture
Plastic zones
Slip irreversibility

ASJC Scopus subject areas

Mechanical Engineering
Mechanics of Materials
General Materials Science

Online availability

10.1016/j.engfracmech.2012.06.002

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title = "Full field measurements of anisotropic stress intensity factor ranges in fatigue",

abstract = "The effects of anisotropy during mixed mode fatigue crack growth were studied in single crystal 316L stainless steel. An anisotropic least-squares regression algorithm using displacements from digital image correlation was developed to find the effective stress intensity factors, K I and K II, and the T-stress. Crack tip plastic zones were determined using an anisotropic yield criterion. Strains in the plastic zone obtained from digital image correlation showed a dependence on the crystallography and load ratio. Crack tip slip irreversibility was measured and showed an increasing trend with increasing crack length; this information is critical for describing crack growth behavior.",

keywords = "Effective stress intensity factor, Fatigue crack growth, Mixed mode fracture, Plastic zones, Slip irreversibility",

author = "Pataky, {Garrett J.} and Sangid, {Michael D.} and Huseyin Sehitoglu and Hamilton, {Reginald F.} and Maier, {Hans J.} and Petros Sofronis",

note = "Funding Information: The research was supported by a Critical Research Initiative (CRI) at the University of Illinois and partly by the US Department of Energy Nuclear Energy University Program (NEUP) under Grant DOE-INL-00091210.",

year = "2012",

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doi = "10.1016/j.engfracmech.2012.06.002",

language = "English (US)",

volume = "94",

pages = "13--28",

journal = "Engineering Fracture Mechanics",

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publisher = "Elsevier BV",

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T1 - Full field measurements of anisotropic stress intensity factor ranges in fatigue

AU - Pataky, Garrett J.

AU - Sangid, Michael D.

AU - Sehitoglu, Huseyin

AU - Hamilton, Reginald F.

AU - Maier, Hans J.

AU - Sofronis, Petros

N1 - Funding Information: The research was supported by a Critical Research Initiative (CRI) at the University of Illinois and partly by the US Department of Energy Nuclear Energy University Program (NEUP) under Grant DOE-INL-00091210.

PY - 2012/11

Y1 - 2012/11

N2 - The effects of anisotropy during mixed mode fatigue crack growth were studied in single crystal 316L stainless steel. An anisotropic least-squares regression algorithm using displacements from digital image correlation was developed to find the effective stress intensity factors, K I and K II, and the T-stress. Crack tip plastic zones were determined using an anisotropic yield criterion. Strains in the plastic zone obtained from digital image correlation showed a dependence on the crystallography and load ratio. Crack tip slip irreversibility was measured and showed an increasing trend with increasing crack length; this information is critical for describing crack growth behavior.

AB - The effects of anisotropy during mixed mode fatigue crack growth were studied in single crystal 316L stainless steel. An anisotropic least-squares regression algorithm using displacements from digital image correlation was developed to find the effective stress intensity factors, K I and K II, and the T-stress. Crack tip plastic zones were determined using an anisotropic yield criterion. Strains in the plastic zone obtained from digital image correlation showed a dependence on the crystallography and load ratio. Crack tip slip irreversibility was measured and showed an increasing trend with increasing crack length; this information is critical for describing crack growth behavior.

KW - Effective stress intensity factor

KW - Fatigue crack growth

KW - Mixed mode fracture

KW - Plastic zones

KW - Slip irreversibility

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VL - 94

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JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

ER -

Full field measurements of anisotropic stress intensity factor ranges in fatigue

Abstract

Keywords

ASJC Scopus subject areas

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