ASTM-E1221 › Historical Revision Information
Standard Test Method for Determining Plane-Strain Crack-Arrest Fracture Toughness, KIa, of Ferritic Steels
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Scope
1.1 This test method employs a side-grooved, crack-line-wedge-loaded specimen to obtain a rapid run-arrest segment of flat-tensile separation with a nearly straight crack front. This test method provides a static analysis determination of the stress intensity factor at a short time after crack arrest. The estimate is denoted K
1.2 The specimen size requirements, discussed later, provide for in-plane dimensions large enough to allow the specimen to be modeled by linear elastic analysis. For conditions of plane-strain, a minimum specimen thickness is also required. Both requirements depend upon the crack arrest toughness and the yield strength of the material. A range of specimen sizes may therefore be needed, as specified in this test method.
1.3 If the specimen does not exhibit rapid crack propagation and arrest, K
1.4 The values stated in SI units are to be regarded as the standards. The values given in parentheses are provided for information only.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Keywords
plane-strain; side grooved; ICS Number Code 77.040.10 (Mechanical testing of metals)
To find similar documents by ASTM Volume:
03.01 (Metals -- Mechanical Testing; Elevated and Low-Temperature Tests; Metallography)
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Document Number
ASTM-E1221-06
Revision Level
2006 EDITION
Status
Superseded
Modification Type
Revision
Publication Date
Jan. 15, 2006
Document Type
Test Method
Page Count
19 pages
Committee Number
E08.07