SYMPOSIA PAPER Published: 01 January 1986

Testing Using Arc-Tension Specimens


JIc was determined in two materials (6061-T651 aluminum and ASTM A-723 Grade 1, Class 4 pressure vessel steel) using arc-tension (A(T)) and compact tension (C(T)) specimens. The J-R curves were determined by using the multispecimen method and the compliance unloading method. J was determined for the A(T) specimen by the Merkle-Corten method of analysis as modified by Clarke and Landes. A correction factor was included to account for the tensile loading component, and both the plastic and elastic components of J were necessary when using the A(T) specimen. With the proper formulas for J in the A(T) specimen, the same J-R curves were determined in both materials using either A(T) or C(T) specimens. This preliminary study suggested that the A(T) specimen was totally adequate for JIc testing and should be included in subsequent versions of ASTM Test for JIc, A Measure of Fracture Toughness (E 813).

Author Information

Kapp, JA
U.S. Army Armament, Munitions, and Chemical Command, Armament Research and Development Center, Large Caliber Weapon Systems Laboratory, Benet Weapons Laboratory, Watervliet, NY
Bilinsky, WJ
General Electric Company, Selkirk, NY
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Developed by Committee: E08
Pages: 297–306
DOI: 10.1520/STP17403S
ISBN-EB: 978-0-8031-4972-4
ISBN-13: 978-0-8031-0472-3