Full-field Strain Measurements for Microstructurally Small Fatigue Crack Propagation Using Digital Image Correlation Method

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Standard

Harvard

APA

Vancouver

Author

Bibtex - Lataa

@article{0aaca40505ea485fa598512420718201,
title = "Full-field Strain Measurements for Microstructurally Small Fatigue Crack Propagation Using Digital Image Correlation Method",
abstract = "A novel measurement approach is used to reveal the cumulative deformation field at a sub-grain level and to study the influence of microstructure on the growth of microstructurally small fatigue cracks. The proposed strain field analysis methodology is based on the use of a unique pattering technique with a characteristic speckle size of approximately 10 µm. The developed methodology is applied to study the small fatigue crack behavior in body centered cubic (bcc) Fe-Cr ferritic stainless steel with a relatively large grain size allowing a high spatial measurement accuracy at the sub-grain level. This methodology allows the measurement of small fatigue crack growth retardation events and associated intermittent shear strain localization zones ahead of the crack tip. In addition, this can be correlated with the grain orientation and size. Thus, the developed methodology can provide a deeper fundamental understanding of the small fatigue crack growth behavior, required for the development of robust theoretical models for the small fatigue crack propagation in polycrystalline materials.",
keywords = "Engineering, Issue 143, Digital image correlation, small fatigue crack, crack growth rate retardation, sub grain level, shear strain localization, strain inhomogeneity, DEFORMATION, DISLOCATION, GROWTH, Strain inhomogeneity, Shear strain localization, Small fatigue crack, Crack growth rate retardation, Sub grain level",
author = "Evgenii Malitckii and Heikki Remes and Pauli Lehto and Sven Bossuyt",
year = "2019",
month = "1",
day = "16",
doi = "10.3791/59134",
language = "English",
volume = "2019",
journal = "Journal of Visualized Experiments",
issn = "1940-087X",
number = "143",

}

RIS - Lataa

TY - JOUR

T1 - Full-field Strain Measurements for Microstructurally Small Fatigue Crack Propagation Using Digital Image Correlation Method

AU - Malitckii, Evgenii

AU - Remes, Heikki

AU - Lehto, Pauli

AU - Bossuyt, Sven

PY - 2019/1/16

Y1 - 2019/1/16

N2 - A novel measurement approach is used to reveal the cumulative deformation field at a sub-grain level and to study the influence of microstructure on the growth of microstructurally small fatigue cracks. The proposed strain field analysis methodology is based on the use of a unique pattering technique with a characteristic speckle size of approximately 10 µm. The developed methodology is applied to study the small fatigue crack behavior in body centered cubic (bcc) Fe-Cr ferritic stainless steel with a relatively large grain size allowing a high spatial measurement accuracy at the sub-grain level. This methodology allows the measurement of small fatigue crack growth retardation events and associated intermittent shear strain localization zones ahead of the crack tip. In addition, this can be correlated with the grain orientation and size. Thus, the developed methodology can provide a deeper fundamental understanding of the small fatigue crack growth behavior, required for the development of robust theoretical models for the small fatigue crack propagation in polycrystalline materials.

AB - A novel measurement approach is used to reveal the cumulative deformation field at a sub-grain level and to study the influence of microstructure on the growth of microstructurally small fatigue cracks. The proposed strain field analysis methodology is based on the use of a unique pattering technique with a characteristic speckle size of approximately 10 µm. The developed methodology is applied to study the small fatigue crack behavior in body centered cubic (bcc) Fe-Cr ferritic stainless steel with a relatively large grain size allowing a high spatial measurement accuracy at the sub-grain level. This methodology allows the measurement of small fatigue crack growth retardation events and associated intermittent shear strain localization zones ahead of the crack tip. In addition, this can be correlated with the grain orientation and size. Thus, the developed methodology can provide a deeper fundamental understanding of the small fatigue crack growth behavior, required for the development of robust theoretical models for the small fatigue crack propagation in polycrystalline materials.

KW - Engineering

KW - Issue 143

KW - Digital image correlation

KW - small fatigue crack

KW - crack growth rate retardation

KW - sub grain level

KW - shear strain localization

KW - strain inhomogeneity

KW - DEFORMATION

KW - DISLOCATION

KW - GROWTH

KW - Strain inhomogeneity

KW - Shear strain localization

KW - Small fatigue crack

KW - Crack growth rate retardation

KW - Sub grain level

UR - http://www.scopus.com/inward/record.url?scp=85061264413&partnerID=8YFLogxK

U2 - 10.3791/59134

DO - 10.3791/59134

M3 - Article

VL - 2019

JO - Journal of Visualized Experiments

JF - Journal of Visualized Experiments

SN - 1940-087X

IS - 143

M1 - 59134

ER -

ID: 32140762