SYMPOSIA PAPER Published: 01 January 1984
STP32730S

An Investigation on the Method for Determination of Fracture Toughness of Metallic Materials with Chevron-Notched Short-Rod and Short-Bar Specimens

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By means of an expression proposed by the authors, dimensionless critical crack lengths and stress-intensity factor coefficients for chevron-notched short-rod specimens were calculated based on the straight-through crack assumption. Calculation was also done for chevron-notched short-bar specimens in an extended range including short bar with rectangular cross section. Three configurations of chevron-notched specimens were used to test fracture toughness KIc for eight metallic materials. Some results were compared with values from standard compact tension and three-point bend specimens. Good agreement was obtained when both stable crack extension and a very small plasticity factor were achieved. The role of load-displacement plot is emphasized. A discussion about some specimen parameters such as dimensionless initial crack length and width to half height (or width to radius) ratio is given.

Author Information

Chizhi, W
Chongqing University, Chongqing, Sichuan, China
Maochan, Y
Chongqing University, Chongqing, Sichuan, China
Tzeguang, C
Chongqing University, Chongqing, Sichuan, China
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Details
Developed by Committee: E08
Pages: 193–204
DOI: 10.1520/STP32730S
ISBN-EB: 978-0-8031-4917-5
ISBN-13: 978-0-8031-0401-3