SYMPOSIA PAPER Published: 01 January 1988
STP23265S

Unloading-Compliance and Load-Drop Analysis of Tests of Irradiated 348 Stainless Steel

Source

Procedures for determining J-integral fracture toughness were applied to load versus load-line displacement data from a series of three-point bend specimens of irradiated 348 stainless steel tested at 23 and 427°C. The ASTM Test Method for JIc, a Measure of Fracture Toughness (E 813-81) was emphasized, using both unloading-compliance and load-drop measures of crack growth.

An effective modulus procedure was included in the unloading—compliance method using recently published load-line displacement results. Two procedures were used for calculating JIc from the J versus unloading-compliance crack growth plots: the linear fit procedure from ASTM Method E 813 and a power-law fit with a 0.2-mm offset value of JIc.

Based on the results of these various procedures, conclusions were reached regarding the most consistent measures of fracture toughness from these data. Suggestions were given regarding the use of effective modulus with unloading-compliance measurement of crack growth and the limitations of the load-drop method for measuring crack growth.

Author Information

Underwood, JH
U.S. Army Armament Research Development and Engineering Center, Watervliet, NY
Haggag, FM
Idaho National Engineering Laboratory, Idaho Falls, ID
Reuter, WG
Idaho National Engineering Laboratory, Idaho Falls, ID Haggag is currently with Battelle Columbus Laboratories, Columbus, OH
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: E08
Pages: 611–621
DOI: 10.1520/STP23265S
ISBN-EB: 978-0-8031-5036-2
ISBN-13: 978-0-8031-0949-0