SYMPOSIA PAPER Published: 01 January 1984
STP32729S

Compliance and Stress-Intensity Factor of Chevron-Notched Three-Point Bend Specimen

Source

An analytical dimensionless compliance formula and normalized load versus load-point displacement plot of chevron-notched three-point bend specimen are derived by use of Bluhm's slice model. The stress intensity factor coefficients are calculated for specimen geometries of W/B = 1.5 and 2, θ = 40° to 90°, and are fitted as polynomials. Fracture-toughness values KIcv of two heat-treatment conditions of GCr15 bearing steel are determined by chevron-notched specimens and compared with the ASTM E 399 valid fracture-toughness values. The comparisons show that for GCr15-I specimens with flat R-curves, KIcv and KIc are in agreement, but for the GCr15-IV specimens with rising R-curves, KIcv are near to Kmax, instead of KIc. The effect of machining tolerance of chevron notch on the measurements is analyzed.

Author Information

Shang-Xian, W
Iron and Steel Research Institute, Anshan Iron and Steel Complex, Anshan, Liaoning Province, China
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Details
Developed by Committee: E08
Pages: 176–192
DOI: 10.1520/STP32729S
ISBN-EB: 978-0-8031-4917-5
ISBN-13: 978-0-8031-0401-3