Revisit of ASTM Round Robin Test Data for Determining R Curves of Thin Sheet Materials

Volume 7, Issue 1 (January 2010)

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ISSN: 1546-962X
CODEN: JAIOAD
Published Online: 5 November 2009
Page Count: 21

Revisit of ASTM Round-Robin Test Data for Determining R Curves of Thin-Sheet Materials

Zhu, Xian-Kui
Senior Research Scientist, Battelle Memorial Institute, Columbus, OH

Leis, Brian N.
Senior Research Leader, Battelle Memorial Institute, Columbus, OH

(Received 13 May 2009; accepted 24 September 2009)

Abstract

This paper revisits the ASTM round-robin fracture test data obtained in 1979–1980 by ASTM Task Group E24.06.02 on Application of Fracture Analysis Methods. The fracture tests were conducted using thin-sheet compact tension [C(T)] specimens made of three materials—7075-T561 aluminum alloy, 2024-T351 aluminum alloy, and 304 stainless steel—and different specimen widths were employed in order to take account of in-plane specimen size effect on fracture toughness. Typical experimental data are reanalyzed, and crack growth resistance curves are developed in accordance with fracture test standards, ASTM E561-05 and ASTM E1820-08. Several useful results as well as the conditions under which the two standards can equivalently determine a geometry-independent resistance curve are obtained for the thin-sheet C(T) specimens.

Keywords:
fracture toughness, R curve, ductile crack growth, thin sheet, ASTM E561-05, ASTM E1820-08

Paper ID: JAI102510
DOI: 10.1520/JAI102510
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Author Title Revisit of ASTM Round-Robin Test Data for Determining R Curves of Thin-Sheet Materials Symposium Ninth International ASTM/ESIS Symposium on Fatigue and Fracture Mechanics (37th ASTM National Symposium on Fatigue and Fracture Mechanics), 2009-05-22 Committee E08

		SEDL / Journals / Journal of ASTM International (JAI) / Citation Page Volume 7, Issue 1 (January 2010) Click here to download this paper now for $25 PDF (368K) View License Agreement ISSN: 1546-962X CODEN: JAIOAD Published Online: 5 November 2009 Page Count: 21 Revisit of ASTM Round-Robin Test Data for Determining R Curves of Thin-Sheet Materials Zhu, Xian-Kui Senior Research Scientist, Battelle Memorial Institute, Columbus, OH Leis, Brian N. Senior Research Leader, Battelle Memorial Institute, Columbus, OH (Received 13 May 2009; accepted 24 September 2009) Abstract This paper revisits the ASTM round-robin fracture test data obtained in 1979–1980 by ASTM Task Group E24.06.02 on Application of Fracture Analysis Methods. The fracture tests were conducted using thin-sheet compact tension [C(T)] specimens made of three materials—7075-T561 aluminum alloy, 2024-T351 aluminum alloy, and 304 stainless steel—and different specimen widths were employed in order to take account of in-plane specimen size effect on fracture toughness. Typical experimental data are reanalyzed, and crack growth resistance curves are developed in accordance with fracture test standards, ASTM E561-05 and ASTM E1820-08. Several useful results as well as the conditions under which the two standards can equivalently determine a geometry-independent resistance curve are obtained for the thin-sheet C(T) specimens. Keywords: fracture toughness, R curve, ductile crack growth, thin sheet, ASTM E561-05, ASTM E1820-08 Paper ID: JAI102510 DOI: 10.1520/JAI102510 ASTM International is a member of CrossRef. Author Title Revisit of ASTM Round-Robin Test Data for Determining R Curves of Thin-Sheet Materials Symposium Ninth International ASTM/ESIS Symposium on Fatigue and Fracture Mechanics (37th ASTM National Symposium on Fatigue and Fracture Mechanics), 2009-05-22 Committee E08