Analysis of Indentation Loading of Cortical Bone Using Acoustic Emission Techniques

Ashkan Safari; Ger Reilly; Brendan McCormack

doi:10.21427/hjpr-wb81

Analysis of Indentation Loading of Cortical Bone Using Acoustic Emission Techniques

Ashkan Safari, Ger Reilly, Brendan McCormack

Research output: Contribution to conference › Paper › peer-review

Abstract

In this study, we recorded the number of Acoustic emission (AE) hits and related AE energy during indentation fracture of cortical bone using a PAC PCI-2 card and pico sensor. A threshold value of 43dB was used to filter premature trigger due to background noise. Registered AE hits had more than one count (threshold crossing). Amplifier gain was set at 40dB with a (0.1-1) MHz band pass filter. 8mm cubes of cortical bones were indented in the longitudinal direction at constant crosshead speed of 1 mm min-1 using a large 2D, 50˚ wedge indenter. We hypothesised that signals occurring as a result of microcracking would have low AE energy and occur prior to and during the period of maximum load whereas those associated with main crack propagation would have high AE energy and occur at fracture only.

Original language	English
DOIs	https://doi.org/10.21427/hjpr-wb81
Publication status	Published - 2005
Externally published	Yes
Event	1st International Conference on the Mechanics of Biomaterials and Tissues - Hawaii, United States Duration: 11 Dec 2005 → 14 Dec 2005

Conference

Conference	1st International Conference on the Mechanics of Biomaterials and Tissues
Country/Territory	United States
City	Hawaii
Period	11/12/05 → 14/12/05

Keywords

Acoustic emission
indentation fracture
cortical bone
microcracking
crack propagation

Access to Document

10.21427/hjpr-wb81Licence: CC BY-NC-SA

Cite this

@conference{d6f122aea8bc42de9ca4df8e4e91ea60,

title = "Analysis of Indentation Loading of Cortical Bone Using Acoustic Emission Techniques",

abstract = "In this study, we recorded the number of Acoustic emission (AE) hits and related AE energy during indentation fracture of cortical bone using a PAC PCI-2 card and pico sensor. A threshold value of 43dB was used to filter premature trigger due to background noise. Registered AE hits had more than one count (threshold crossing). Amplifier gain was set at 40dB with a (0.1-1) MHz band pass filter. 8mm cubes of cortical bones were indented in the longitudinal direction at constant crosshead speed of 1 mm min-1 using a large 2D, 50˚ wedge indenter. We hypothesised that signals occurring as a result of microcracking would have low AE energy and occur prior to and during the period of maximum load whereas those associated with main crack propagation would have high AE energy and occur at fracture only.",

keywords = "Acoustic emission, indentation fracture, cortical bone, microcracking, crack propagation",

author = "Ashkan Safari and Ger Reilly and Brendan McCormack",

year = "2005",

doi = "10.21427/hjpr-wb81",

language = "English",

note = "1st International Conference on the Mechanics of Biomaterials and Tissues ; Conference date: 11-12-2005 Through 14-12-2005",

}

TY - CONF

T1 - Analysis of Indentation Loading of Cortical Bone Using Acoustic Emission Techniques

AU - Safari, Ashkan

AU - Reilly, Ger

AU - McCormack, Brendan

PY - 2005

Y1 - 2005

N2 - In this study, we recorded the number of Acoustic emission (AE) hits and related AE energy during indentation fracture of cortical bone using a PAC PCI-2 card and pico sensor. A threshold value of 43dB was used to filter premature trigger due to background noise. Registered AE hits had more than one count (threshold crossing). Amplifier gain was set at 40dB with a (0.1-1) MHz band pass filter. 8mm cubes of cortical bones were indented in the longitudinal direction at constant crosshead speed of 1 mm min-1 using a large 2D, 50˚ wedge indenter. We hypothesised that signals occurring as a result of microcracking would have low AE energy and occur prior to and during the period of maximum load whereas those associated with main crack propagation would have high AE energy and occur at fracture only.

AB - In this study, we recorded the number of Acoustic emission (AE) hits and related AE energy during indentation fracture of cortical bone using a PAC PCI-2 card and pico sensor. A threshold value of 43dB was used to filter premature trigger due to background noise. Registered AE hits had more than one count (threshold crossing). Amplifier gain was set at 40dB with a (0.1-1) MHz band pass filter. 8mm cubes of cortical bones were indented in the longitudinal direction at constant crosshead speed of 1 mm min-1 using a large 2D, 50˚ wedge indenter. We hypothesised that signals occurring as a result of microcracking would have low AE energy and occur prior to and during the period of maximum load whereas those associated with main crack propagation would have high AE energy and occur at fracture only.

KW - Acoustic emission

KW - indentation fracture

KW - cortical bone

KW - microcracking

KW - crack propagation

U2 - 10.21427/hjpr-wb81

DO - 10.21427/hjpr-wb81

M3 - Paper

T2 - 1st International Conference on the Mechanics of Biomaterials and Tissues

Y2 - 11 December 2005 through 14 December 2005

ER -

Analysis of Indentation Loading of Cortical Bone Using Acoustic Emission Techniques

Abstract

Conference

Keywords

Access to Document

Fingerprint

Cite this