Published: Jan 1979
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Fatigue crack growth in chromium-molybdenum-vanadium steel was studied in the high-rate regime of 2.5 × 10-4 to 2.5 × 10-1 mm/cycle with a compact-type strip specimen. The specimen was found to give rise to constant growth rates over large increments of crack length when cycled under simple load control. Use of the crack opening load ranges and an approximate J-integral analysis showed that the growth was occurring under essentially constant ΔJ.
fatigue crack growth, fracture mechanics, J-integral, crack propagation
Manager, Materials and Processes Laboratory, General Electric Company, Schenectady, New York