Location

La Jolla, CA

Start Date

1-1-1987 12:00 AM

Description

Asperity contact along the fracture surface of a crack is one of the mechanisms of crack closure. This contact shields the crack tip, in part, from the externally applied driving force on the crack. We have now succeeded in using experimental information, obtained under plane strain conditions from acoustic transmission and diffraction experiments in the closure region [1,2] to determine a stress intensity factor, KI(local), which shields the crack tip below a stress intensity factor KIclosure a t first contact during unloading occurs.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

6B

Chapter

Chapter 8: Materials Characterization

Section

Cracks and Deformation

Pages

1601-1607

DOI

10.1007/978-1-4613-1893-4_180

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Determining Crack Tip Shielding by Means of Acoustic Transmission and Diffraction Measurements

La Jolla, CA

Asperity contact along the fracture surface of a crack is one of the mechanisms of crack closure. This contact shields the crack tip, in part, from the externally applied driving force on the crack. We have now succeeded in using experimental information, obtained under plane strain conditions from acoustic transmission and diffraction experiments in the closure region [1,2] to determine a stress intensity factor, KI(local), which shields the crack tip below a stress intensity factor KIclosure a t first contact during unloading occurs.