Measuring <i>J</i><sup>Ic</sup>, and the Resistance to Crack Growth After Initiation

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Volume 8, Issue 5 (September 1980)

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ISSN: 0090-3973
Page Count: 2

Measuring J^Ic, and the Resistance to Crack Growth After Initiation
Early, PW
Research assistant and professor, University of Rochester, N.Y.

Burns, SJ
Research assistant and professor, University of Rochester, N.Y.

Abstract

A ductile fracture toughness (J^Ic) test that uses fracture specimens with finite differences in crack area is reviewed. Experimental results are given for Ti-6Al-4V, A471 Ni-Cr-Mo-V rotor steel, and 4140 high strength steel. Resistance to further crack propagation after initiation is discussed in terms of the tearing modulus, which is equal to dJ/dA, A being the crack area. A useful expression for the tearing modulus is given.

Keywords:
fracture strength, crack propagation, tearing fracture, J integral, tearing modulus

Paper ID: JTE10615J
DOI: 10.1520/JTE10615J
ASTM International is a member of CrossRef.

Author Title Measuring J^Ic, and the Resistance to Crack Growth After Initiation Symposium , 0000-00-00 Committee E08

		Home Journals STPs Manuals Topics Subscriptions/Pricing Digital Library / Journals / Journal of Testing and Evaluation (JTE) / Citation Page Volume 8, Issue 5 (September 1980) Click here to download this paper now for $25 PDF (65K) View License Agreement ISSN: 0090-3973 Page Count: 2 Measuring J^Ic, and the Resistance to Crack Growth After Initiation Early, PW Research assistant and professor, University of Rochester, N.Y. Burns, SJ Research assistant and professor, University of Rochester, N.Y. Abstract A ductile fracture toughness (J^Ic) test that uses fracture specimens with finite differences in crack area is reviewed. Experimental results are given for Ti-6Al-4V, A471 Ni-Cr-Mo-V rotor steel, and 4140 high strength steel. Resistance to further crack propagation after initiation is discussed in terms of the tearing modulus, which is equal to dJ/dA, A being the crack area. A useful expression for the tearing modulus is given. Keywords: fracture strength, crack propagation, tearing fracture, J integral, tearing modulus Paper ID: JTE10615J DOI: 10.1520/JTE10615J ASTM International is a member of CrossRef. Author Title Measuring J^Ic, and the Resistance to Crack Growth After Initiation Symposium , 0000-00-00 Committee E08