Presenter Information

C. Pecorari, Oxford University

Location

Brunswick, ME

Start Date

1-1-1997 12:00 AM

Description

Grinding the surface of ceramic components inevitably introduces micro-damage in their near-surface region. Surface damage appears in the form of surface roughness, residual stresses, and distributions of microcracks. Microcracks generated by surface grinding are of three kinds: lateral, median, and radial cracks. Lateral cracks run parallel to the surface, and are responsible for material removal. Median and radial cracks extend normally to the surface into the bulk, with the former running parallel to the grinding direction, and the latter extending normally to it. Median cracks are the deepest of the two, and are responsible for degradation of the surface fracture properties. A method for the non-destructive characterization of surface crack distributions in brittle materials is, therefore, much needed.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

16A

Chapter

Chapter 1: Standard Techniques

Section

UT Guided Waves

Pages

161-168

DOI

10.1007/978-1-4615-5947-4_21

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Rayleigh Wave Dispersion Due to One-Dimensional Interacting Cracks

Brunswick, ME

Grinding the surface of ceramic components inevitably introduces micro-damage in their near-surface region. Surface damage appears in the form of surface roughness, residual stresses, and distributions of microcracks. Microcracks generated by surface grinding are of three kinds: lateral, median, and radial cracks. Lateral cracks run parallel to the surface, and are responsible for material removal. Median and radial cracks extend normally to the surface into the bulk, with the former running parallel to the grinding direction, and the latter extending normally to it. Median cracks are the deepest of the two, and are responsible for degradation of the surface fracture properties. A method for the non-destructive characterization of surface crack distributions in brittle materials is, therefore, much needed.