Microstructure-sensitive small fatigue crack growth assessment. Effect of strain ratio multiaxial strain state and geometric discontinuities
Abstract
Fatigue crack initiation in the high cycle fatigue regime is strongly influenced by microstructural features. Research efforts have usually focused on predicting fatigue resistance against crack incubation without considering the early fatigue crack growth after encountering the first grain boundary. However, a significant fraction of the variability of the total fatigue life can be attributed to growth of small cracks as they encounter the first few grain boundaries, rather than crack formation within the first grain. Our paper builds on the framework previously developed by the authors to assess microstructure-sensitive small fatigue crack formation and early growth under complex loading conditions. Moreover, the scheme employs finite element simulations that explicitly render grains and crystallographic directions along with simulation of microstructurally small fatigue crack growth from grain to grain. The methodology employs a crystal plasticity algorithm in ABAQUS that was previously calibrated to study fatigue crack initiation in RR1000 Ni-base superalloy. Our work present simulations with non-zero applied mean strains and geometric discontinuities that were not previously considered for calibration. Results exhibit trends similar to those found in experiments for multiple metallic materials, conveying a consistent physical description of fatigue damage phenomena.
- Authors:
-
- Georgia Inst. of Technology, Atlanta, GA (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1237463
- Report Number(s):
- SAND-2015-1888J
Journal ID: ISSN 0142-1123; 579535
- Grant/Contract Number:
- AC04-94AL85000
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- International Journal of Fatigue
- Additional Journal Information:
- Journal Volume: 82; Journal ID: ISSN 0142-1123
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; fatigue crack initiation; microstructural small cracks; stress and strain ratios; geometric discontinuity; multiaxial loading
Citation Formats
Castelluccio, Gustavo M., and McDowell, David L. Microstructure-sensitive small fatigue crack growth assessment. Effect of strain ratio multiaxial strain state and geometric discontinuities. United States: N. p., 2015.
Web. doi:10.1016/j.ijfatigue.2015.09.007.
Castelluccio, Gustavo M., & McDowell, David L. Microstructure-sensitive small fatigue crack growth assessment. Effect of strain ratio multiaxial strain state and geometric discontinuities. United States. https://doi.org/10.1016/j.ijfatigue.2015.09.007
Castelluccio, Gustavo M., and McDowell, David L. 2015.
"Microstructure-sensitive small fatigue crack growth assessment. Effect of strain ratio multiaxial strain state and geometric discontinuities". United States. https://doi.org/10.1016/j.ijfatigue.2015.09.007. https://www.osti.gov/servlets/purl/1237463.
@article{osti_1237463,
title = {Microstructure-sensitive small fatigue crack growth assessment. Effect of strain ratio multiaxial strain state and geometric discontinuities},
author = {Castelluccio, Gustavo M. and McDowell, David L.},
abstractNote = {Fatigue crack initiation in the high cycle fatigue regime is strongly influenced by microstructural features. Research efforts have usually focused on predicting fatigue resistance against crack incubation without considering the early fatigue crack growth after encountering the first grain boundary. However, a significant fraction of the variability of the total fatigue life can be attributed to growth of small cracks as they encounter the first few grain boundaries, rather than crack formation within the first grain. Our paper builds on the framework previously developed by the authors to assess microstructure-sensitive small fatigue crack formation and early growth under complex loading conditions. Moreover, the scheme employs finite element simulations that explicitly render grains and crystallographic directions along with simulation of microstructurally small fatigue crack growth from grain to grain. The methodology employs a crystal plasticity algorithm in ABAQUS that was previously calibrated to study fatigue crack initiation in RR1000 Ni-base superalloy. Our work present simulations with non-zero applied mean strains and geometric discontinuities that were not previously considered for calibration. Results exhibit trends similar to those found in experiments for multiple metallic materials, conveying a consistent physical description of fatigue damage phenomena.},
doi = {10.1016/j.ijfatigue.2015.09.007},
url = {https://www.osti.gov/biblio/1237463},
journal = {International Journal of Fatigue},
issn = {0142-1123},
number = ,
volume = 82,
place = {United States},
year = {Wed Sep 16 00:00:00 EDT 2015},
month = {Wed Sep 16 00:00:00 EDT 2015}
}
Web of Science
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Works referencing / citing this record:
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