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Acoustic emission monitoring in geotechnical element tests
conference contribution
posted on 2019-04-05, 10:54 authored by Alister SmithAlister Smith, T. Biller, Helen J. Heather-Smith, Neil Dixon, James A. FlintAcoustic emission (AE) is high-frequency noise (>10kHz) generated by deforming materials. AE is widely used in many industries for non-destructive testing and evaluation; however, it is seldom used in geotechnical engineering, despite evidence of the benefits, because AE generated by particulate materials is highly complex and difficult to measure and interpret. This paper demonstrates that innovative AE instrumentation and measurement can enhance insights into geotechnical element tests. Results from a programme of triaxial compression and shear, large direct-shear and large permeameter experiments show that AE can be used to characterise mechanical and hydromechanical behaviour of soils and soil-structure interaction, including: dilative shear behaviour; transitions from pre- to post-peak shear strength; changes in strain rates; isotropic compression; unload-reload cycles of compression and shear; and seepage-induced internal instability phenomena.
Funding
Alister Smith acknowledges the support of an EPSRC Fellowship (EP/P012493/1). Tiago Biller acknowledges the support of a Loughborough University PhD studentship. Helen Heather-Smith acknowledges the support of a DTA PhD studentship.
History
School
- Architecture, Building and Civil Engineering
Published in
Proceedings of the XVII European Conference on Soil Mechanics and Geotechnical EngineeringCitation
SMITH, A. ... et al, 2019. Acoustic emission monitoring in geotechnical element tests. IN: Proceedings of the XVII European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE 2019), Reykjavik, Iceland, 1-7 September 2019.Publisher
International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE) © The authors and IGSVersion
- AM (Accepted Manuscript)
Acceptance date
2019-02-01Publication date
2019-09-01Copyright date
2019ISBN
9789935943613Publisher version
Language
- en