Location

Brunswick, ME

Start Date

1-1-1997 12:00 AM

Description

Acoustic emission (AE) measurements are used to assess the degradation of loaded structures with time. Structures are routinely monitored over long time scales by measuring the energy of AE events at one or more locations on the surface of the structure, a rapid increase in the measured AE activity indicating the onset of failure. Thus the measurements can be said to be comparative, being only relevant to the structure under test and not widely comparable with the responses of other structures. An improvement in the applicability of AE monitoring could be gained if the measured AE activity could be directly related to the source strength. It would then be possible to define a critical source energy in a similar way to that of the critical crack length used in fracture mechanics.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

16A

Chapter

Chapter 1: Standard Techniques

Section

Acoustic Emission

Pages

389-396

DOI

10.1007/978-1-4615-5947-4_52

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Generation of Diffuse Lamb Waves in Plates

Brunswick, ME

Acoustic emission (AE) measurements are used to assess the degradation of loaded structures with time. Structures are routinely monitored over long time scales by measuring the energy of AE events at one or more locations on the surface of the structure, a rapid increase in the measured AE activity indicating the onset of failure. Thus the measurements can be said to be comparative, being only relevant to the structure under test and not widely comparable with the responses of other structures. An improvement in the applicability of AE monitoring could be gained if the measured AE activity could be directly related to the source strength. It would then be possible to define a critical source energy in a similar way to that of the critical crack length used in fracture mechanics.