Experimental observations and numerical predictions of three-dimensional fatigue crack propagation

W. T. Riddell; A. R. Ingraffea; P. A. Wawrzynek

doi:10.1016/S0013-7944(97)00122-7

Experimental observations and numerical predictions of three-dimensional fatigue crack propagation

W. T. Riddell, A. R. Ingraffea, P. A. Wawrzynek

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

35 Scopus citations

Abstract

Experimental observations of three-dimensional fatigue crack growth are compared to numerical predictions from three computer codes. For simple geometries contained in standard libraries of some codes, restricting numerically predicted crack shapes to elliptical quadrants does not adversely affect crack growth rate predictions. However, this approach is limited by the availability of pre-existing solutions. Furthermore, elliptical quadrants are not always representative of true crack shape. More general modeling capabilities allow accurate geometric representation of both the base specimen and the crack front shape for a wide range of configurations. This capability allows reasonable and/or conservative fatigue crack growth predictions for many cases not handled by geometric libraries. However, the more general modeling capability does not lead to improved fatigue life predictions for simple geometries. Further research is necessary to improve fatigue life prediction capabilities for complex geometries.

Original language	English (US)
Pages (from-to)	293-310
Number of pages	18
Journal	Engineering Fracture Mechanics
Volume	58
Issue number	4
DOIs	https://doi.org/10.1016/S0013-7944(97)00122-7
State	Published - Nov 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.1016/S0013-7944(97)00122-7

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@article{4890a00291bf4ecaafaf0f7a581c7957,

title = "Experimental observations and numerical predictions of three-dimensional fatigue crack propagation",

abstract = "Experimental observations of three-dimensional fatigue crack growth are compared to numerical predictions from three computer codes. For simple geometries contained in standard libraries of some codes, restricting numerically predicted crack shapes to elliptical quadrants does not adversely affect crack growth rate predictions. However, this approach is limited by the availability of pre-existing solutions. Furthermore, elliptical quadrants are not always representative of true crack shape. More general modeling capabilities allow accurate geometric representation of both the base specimen and the crack front shape for a wide range of configurations. This capability allows reasonable and/or conservative fatigue crack growth predictions for many cases not handled by geometric libraries. However, the more general modeling capability does not lead to improved fatigue life predictions for simple geometries. Further research is necessary to improve fatigue life prediction capabilities for complex geometries.",

author = "Riddell, {W. T.} and Ingraffea, {A. R.} and Wawrzynek, {P. A.}",

note = "Funding Information: Acknowledgements--This research was sponsored by NASA/Marshal Space Flight Center, under grant NAS8-38103. NASA/FLAGRO was developed at NASA/Johnson. NASCRAC@ was developed by Failure Analysis Associates in Palo Alto, California. FRANC3D was developed by the Cornell Fracture Group, under the direction of Professor Anthony Ingraffea. The input of Dr Bruce Carter, Professor Alan Zehnder, Professor Mircea Grigoriu, Timmy Clemmons, Jim Favenesi and Jay Lambert are greatly appreciated.",

year = "1997",

month = nov,

doi = "10.1016/S0013-7944(97)00122-7",

language = "English (US)",

volume = "58",

pages = "293--310",

journal = "Engineering Fracture Mechanics",

issn = "0013-7944",

publisher = "Elsevier B.V.",

number = "4",

}

TY - JOUR

T1 - Experimental observations and numerical predictions of three-dimensional fatigue crack propagation

AU - Riddell, W. T.

AU - Ingraffea, A. R.

AU - Wawrzynek, P. A.

N1 - Funding Information: Acknowledgements--This research was sponsored by NASA/Marshal Space Flight Center, under grant NAS8-38103. NASA/FLAGRO was developed at NASA/Johnson. NASCRAC@ was developed by Failure Analysis Associates in Palo Alto, California. FRANC3D was developed by the Cornell Fracture Group, under the direction of Professor Anthony Ingraffea. The input of Dr Bruce Carter, Professor Alan Zehnder, Professor Mircea Grigoriu, Timmy Clemmons, Jim Favenesi and Jay Lambert are greatly appreciated.

PY - 1997/11

Y1 - 1997/11

N2 - Experimental observations of three-dimensional fatigue crack growth are compared to numerical predictions from three computer codes. For simple geometries contained in standard libraries of some codes, restricting numerically predicted crack shapes to elliptical quadrants does not adversely affect crack growth rate predictions. However, this approach is limited by the availability of pre-existing solutions. Furthermore, elliptical quadrants are not always representative of true crack shape. More general modeling capabilities allow accurate geometric representation of both the base specimen and the crack front shape for a wide range of configurations. This capability allows reasonable and/or conservative fatigue crack growth predictions for many cases not handled by geometric libraries. However, the more general modeling capability does not lead to improved fatigue life predictions for simple geometries. Further research is necessary to improve fatigue life prediction capabilities for complex geometries.

AB - Experimental observations of three-dimensional fatigue crack growth are compared to numerical predictions from three computer codes. For simple geometries contained in standard libraries of some codes, restricting numerically predicted crack shapes to elliptical quadrants does not adversely affect crack growth rate predictions. However, this approach is limited by the availability of pre-existing solutions. Furthermore, elliptical quadrants are not always representative of true crack shape. More general modeling capabilities allow accurate geometric representation of both the base specimen and the crack front shape for a wide range of configurations. This capability allows reasonable and/or conservative fatigue crack growth predictions for many cases not handled by geometric libraries. However, the more general modeling capability does not lead to improved fatigue life predictions for simple geometries. Further research is necessary to improve fatigue life prediction capabilities for complex geometries.

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JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

IS - 4

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Experimental observations and numerical predictions of three-dimensional fatigue crack propagation

Abstract

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