Details
| Original language | English |
|---|---|
| Title of host publication | Novel Optical Systems, Methods, and Applications XXII |
| Editors | Cornelius F. Hahlweg, Joseph R. Mulley |
| Publisher | SPIE |
| Number of pages | 10 |
| ISBN (electronic) | 9781510629035 |
| Publication status | Published - 9 Sept 2019 |
| Event | 22nd Annual Conference for Novel Optical Systems, Methods, and Applications 2019 - San Diego, United States Duration: 11 Aug 2019 → 15 Aug 2019 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 11105 |
| ISSN (Print) | 0277-786X |
| ISSN (electronic) | 1996-756X |
Abstract
Ultrasonic mechanical vibrations in solids are widely used in non-destructive testing, and high-power applications such as ultrasonic welding or soldering. The visualization of ultrasonic wave propagation in transparent solids is helpful for understanding the ultrasonic behaviours. The classical method of photoelasticity allows the visualization of the static stress distribution in birefringent materials. Utilizing recent high-power LEDs in the photoelasticity allows to capture dynamic stresses by high frequency stroboscopic light. High frequency stationary and transient oscillation processes in elastic solids can be visualized with this method. The designed LED array in this paper has a dimension of 210 mm 300 mm, and every LED has distance of 38mm to each other, and the light intensity has a homogeneity value. The temporal and spatial resolution of stress-optic systems depends mainly on the dynamic properties of the lighting technology used. The high speed synchronization of the stroboscopic light sources results in a high temporal resolution of the photoelasticity analyses. This enables the photoelastic investigation of highly dynamic load conditions, such as longitudinal waves and transverse waves.
Keywords
- Dynamic photoelasticity, IGBT, Stroboscopic LED array, Ultrasound
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Computer Science(all)
- Computer Science Applications
- Mathematics(all)
- Applied Mathematics
- Engineering(all)
- Electrical and Electronic Engineering
Cite this
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- Apa
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- BibTeX
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Novel Optical Systems, Methods, and Applications XXII. ed. / Cornelius F. Hahlweg; Joseph R. Mulley. SPIE, 2019. 1110503 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11105).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Visualization of dynamic stress conditions in elastic solids utilizing high frequency stroboscopic LED arrays
AU - Shi, Jian
AU - Ohrdes, Hendrik
AU - Weinstein, Michael
AU - Twiefel, Jens
N1 - Funding Information: This project is within the Tailored Light Programme funded by Lower Saxony Ministry of Education.
PY - 2019/9/9
Y1 - 2019/9/9
N2 - Ultrasonic mechanical vibrations in solids are widely used in non-destructive testing, and high-power applications such as ultrasonic welding or soldering. The visualization of ultrasonic wave propagation in transparent solids is helpful for understanding the ultrasonic behaviours. The classical method of photoelasticity allows the visualization of the static stress distribution in birefringent materials. Utilizing recent high-power LEDs in the photoelasticity allows to capture dynamic stresses by high frequency stroboscopic light. High frequency stationary and transient oscillation processes in elastic solids can be visualized with this method. The designed LED array in this paper has a dimension of 210 mm 300 mm, and every LED has distance of 38mm to each other, and the light intensity has a homogeneity value. The temporal and spatial resolution of stress-optic systems depends mainly on the dynamic properties of the lighting technology used. The high speed synchronization of the stroboscopic light sources results in a high temporal resolution of the photoelasticity analyses. This enables the photoelastic investigation of highly dynamic load conditions, such as longitudinal waves and transverse waves.
AB - Ultrasonic mechanical vibrations in solids are widely used in non-destructive testing, and high-power applications such as ultrasonic welding or soldering. The visualization of ultrasonic wave propagation in transparent solids is helpful for understanding the ultrasonic behaviours. The classical method of photoelasticity allows the visualization of the static stress distribution in birefringent materials. Utilizing recent high-power LEDs in the photoelasticity allows to capture dynamic stresses by high frequency stroboscopic light. High frequency stationary and transient oscillation processes in elastic solids can be visualized with this method. The designed LED array in this paper has a dimension of 210 mm 300 mm, and every LED has distance of 38mm to each other, and the light intensity has a homogeneity value. The temporal and spatial resolution of stress-optic systems depends mainly on the dynamic properties of the lighting technology used. The high speed synchronization of the stroboscopic light sources results in a high temporal resolution of the photoelasticity analyses. This enables the photoelastic investigation of highly dynamic load conditions, such as longitudinal waves and transverse waves.
KW - Dynamic photoelasticity
KW - IGBT
KW - Stroboscopic LED array
KW - Ultrasound
UR - http://www.scopus.com/inward/record.url?scp=85074450930&partnerID=8YFLogxK
U2 - 10.15488/10279
DO - 10.15488/10279
M3 - Conference contribution
AN - SCOPUS:85074450930
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Novel Optical Systems, Methods, and Applications XXII
A2 - Hahlweg, Cornelius F.
A2 - Mulley, Joseph R.
PB - SPIE
T2 - 22nd Annual Conference for Novel Optical Systems, Methods, and Applications 2019
Y2 - 11 August 2019 through 15 August 2019
ER -