C-Specimen Fracture Toughness Testing: Effect of Side Grooves and η Factor-Reference-Cited by-同舟云学术

C-Specimen Fracture Toughness Testing: Effect of Side Grooves and η Factor

Published:2004-08-01 Issue:3 Volume:126 Page:293-299
ISSN:0094-9930
Container-title:Journal of Pressure Vessel Technology
language:en
Short-container-title:

Author:

Kim Y.¹,Chao Y. J.¹,Pechersky M. J.²,Morgan M. J.²

Affiliation:

1. Department of Mechanical Engineering, University of South Carolina, Columbia, SC 29208

2. Savannah River Technology Center, Savannah River Company, Aiken, SC 29808

Abstract

Elastic-plastic crack front fields in arc-shaped tension specimens (C-specimens) were analyzed by a three-dimensional finite element method. The effect of side grooves on the ductile fracture behavior was investigated by studying the J-integral distribution, plane-strain constraint parameter, and development of plastic zones and comparing to experimental data. The applicability of the η factor (derived for use with compact tension specimens) for the calculation of J-integral values for the C-specimen was also investigated. The results show that side grooves promote and establish near plane strain conditions at the crack front in sub-size specimens. It was also found that a two-dimensional plane-strain analysis in conjunction with the standard American Society for Testing and Materials (ASTM) tests was sufficient to determine the fracture toughness values from side-grooved C-specimen. The results indicate the η factor for compact tension specimen as specified in the ASTM standards appears to produce reliable results for the calculation of J of C-specimens.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Safety, Risk, Reliability and Quality

Link

http://asmedigitalcollection.asme.org/pressurevesseltech/article-pdf/126/3/293/5528059/293_1.pdf

Reference17 articles.

1. ASTM E 399-97, “Standard Test Method for Plane-Strain Fracture Toughness of Metallic Materials,” ASTM.

2. Brosa, V. G., Bernal, C., and Frontini, P., 1999, “Calibration of Fracture Mechanics Parameters and J-R Curve Determination in Polyethylene Side-Grooved Arc-Shaped Specimens,” Eng. Fract. Mech., 62, pp. 231–248.

3. Goan, J. M., Sutton, M. A., and Chao, Y. J., 1990, “Assessment of the Engineering Approach for the Evaluation of C-Shaped Specimens,” ASME J. Pressure Vessel Technol., 112, pp. 353–365.

4. Paris, P. C., 1977, “Fracture Mechanic in the Elastic-Plastic Regime,” Flaw Growth and Fracture, ASTM STP 631, American Society for Testing and Materials, pp. 3–27.

5. Paris, P. C., Tada, H., Zahoor, A., and Ernst, H., 1979, “The Theory of Instability of the Tearing Mode of Elastic-Plastic Crack Growth,” Elastic-Plastic Fracture, ASTM STP 668, American Society for Testing and Materials, pp. 5–36.

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