scholarly journals Microscopic Damage Characterization on L-shaped CFRP Laminates for Lower Limb Orthosis with Acoustic Emission Measurement

2020 ◽  
Vol 46 (2) ◽  
pp. 46-53
Author(s):  
Satoshi KOBAYASHI ◽  
Shogo NAKAMURA ◽  
Toshiko OSADA
Keyword(s):  
Acoustic Emission ◽  
Lower Limb ◽  
Emission Measurement ◽  
Cfrp Laminates ◽  
Damage Characterization ◽  
Microscopic Damage ◽  
Acoustic Emission Measurement

Körperschallemission in CFK und Fräswerkzeugen/Acoustic emission in CFRP and milling tools – Analysis of emitted acoustic emission in analogous experiments

2021 ◽  
Vol 111 (07-08) ◽  
pp. 495-500
Author(s):  
Eckart Uhlmann ◽  
Tobias Holznagel ◽  
Sebastian Ospina Mora
Keyword(s):  
Acoustic Emission ◽  
Tool Wear ◽  
Process Monitoring ◽  
Detailed Examination ◽  
Data Driven ◽  
Material Damage ◽  
Emission Measurement ◽  
Wear Rates ◽  
Milling Tools ◽  
Acoustic Emission Measurement

Herausforderungen bei der spanenden Bearbeitung von CFK sind unerwünschte Materialschädigungen im Bauteil sowie hohe Werkzeugverschleißraten. Für diese Arbeit wurden zerstörende Analogversuche an CFK und diamantbeschichteten Hartmetallproben durchgeführt und die Körperschallmesssignale analysiert. Die eingehende Untersuchung der Messwerte aus den Analogversuchen kann zu einer datengetriebenen Parametrierung einer körperschallbasierten Prozessüberwachung für die Fräsbearbeitung von CFK beitragen.   Challenges in machining CFRP are unwanted material damage in the component and high tool wear rates. For this work, destructive analogy experiments were carried out on CFRP and diamond-coated milling tools while analyzing the acoustic emission measurement signals. The detailed examination of the measured values from the analogy experiment can contribute to a data-driven parameterization of an acoustic emission-based process monitoring for the milling of CFRP.

Acoustic emission measurement using a strain-insensitive fiber Bragg grating sensor under varying load conditions

2009 ◽  
Vol 34 (19) ◽  
pp. 2942 ◽  
Author(s):  
Hiroshi Tsuda ◽  
Eiichi Sato ◽  
Tomio Nakajima ◽  
Hideyuki Nakamura ◽  
Takahiro Arakawa ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Fiber Bragg Grating ◽  
Fiber Bragg Grating Sensor ◽  
Bragg Grating ◽  
Emission Measurement ◽  
Bragg Grating Sensor ◽  
Acoustic Emission Measurement ◽  
Load Conditions

Continuous monitoring by acoustic emission measurement

1992 ◽  
Vol 25 (6) ◽  
pp. 295
Author(s):  
C.B. Scruby ◽  
M.J. Beesley ◽  
K.A. Stacey ◽  
D.J. Buttle
Keyword(s):  
Acoustic Emission ◽  
Continuous Monitoring ◽  
Emission Measurement ◽  
Acoustic Emission Measurement

A Scanning Method to Study the Influence of Roughness, Microwaviness, and Lubricant Thickness Variation on Slider Dynamics

2005 ◽  
Author(s):  
Maik Duwensee ◽  
Bernhard E. Knigge ◽  
Peter Baumgart ◽  
Frank E. Talke
Keyword(s):  
Acoustic Emission ◽  
Disk Surface ◽  
Flying Height ◽  
Thickness Variation ◽  
Emission Measurement ◽  
Lubricant Thickness ◽  
Scanning Method ◽  
Displacement Maps ◽  
Acoustic Emission Measurement ◽  
A Current

Flying height modulation maps and microwaviness maps are obtained by using laser Doppler vibrometry (LDV) and acoustic emission (AE) transducers which are moved radially over the complete disk surface. The sensitivity of the acoustic emission measurement is improved by applying a current to the write element, thereby increasing pole tip protrusion. Disk and slider displacement maps are obtained using a radially scratched disk. Acoustic emission maps are presented for a scratched disk and for a non-scratched disk. For the non-scratched disk, AE maps are obtained with an inactive and active write element.

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