In this paper, a brief overview of an accurate technology has been given to measure non-contact and full-field displacement, deformations and strains. The simple and robust setup is well-suited to both laboratory and field conditions and minimal specimen preparation is required. In combination with high speed cameras this technology can be easily used for highly dynamic impact, crash and component testing. The measurement results of the cover during the first milliseconds of an airbag's deployment show unexpected strain distributions around the hyphenation point. This could cause, that parts are catapulted away with high velocity if the cover breaks in a location other than the hyphenation point. It is clear that this measured airbag module must be further optimized for passenger safety. Due to the meaningful and accurate results the application field of the digital image correlation technique is very large and leads to cost reduction in system development and manufacturing. The key points of the technology and analysis software are: Curved or planar objects from 10x10mm to more than 10x10m size. Accuracy unaffected by large in-plane rotations or translations. Accuracy up to +/-0.01 pixels in displacement (e.g. 0.01mm at 1x1m measurement field with mega pixel camera). Accuracy > 200 microstrain. Strain levels in excess of 100% have been successfully measured. Complex loading (combined tension/torsion, compression, pressurization etc.). Quasi-static to ultra-high speed events.
Efficient optimization of airbags by the measurement of the time resolved strain distribution on airbag covers
Effiziente Optimierung von Airbags durch Messung der zeitlich aufgelösten Verformungsverteilung an der Airbag-Hülle
2006
12 Seiten, 13 Bilder, 9 Quellen
Aufsatz (Konferenz)
Englisch
British Library Conference Proceedings | 2006
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