SYMPOSIA PAPER Published: 01 January 1980
STP36969S

Elastic-Plastic Fracture Mechanics for High-Temperature Fatigue Crack Growth

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Application of linear elastic and elastic-plastic fracture mechanics parameters to high-temperature fatigue crack growth is examined to determine which parameter provides a better correlation of crack growth data. It is concluded that the J-integral concept is applicable to fatigue, and methods of determination of J for both load-controlled and displacement-controlled fatigue are discussed. The J-integral parameter is shown to be better than the linear elastic parameter K in correlating fatigue crack growth, particularly so in materials that undergo metallurgical changes during test resulting in changes in flow properties. Application of the J-integral concept to time-dependent and combined cycle and time-dependent crack growth is discussed in detail.

Author Information

Sadananda, K
Thermostructural Materials Branch, Material Science and Technology Division, Naval Research Laboratory, Washington, D.C.
Shahinian, P
Thermostructural Materials Branch, Material Science and Technology Division, Naval Research Laboratory, Washington, D.C.
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Details
Developed by Committee: E08
Pages: 152–163
DOI: 10.1520/STP36969S
ISBN-EB: 978-0-8031-4770-6
ISBN-13: 978-0-8031-0363-4