ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Flexible polymer heart valves are promising clinical prostheses for replacement ofdiseased or malfunctioned natural heart valves. However, the flexible polymer leaflets are prone tofatigue fracture, which hinders their practicality in clinical applications. In this study, micro strainsensor (gauge) for strain measurement is designed in the polyurethane (PU) thin film to measure thestress/strain in situ. In our design, the strain gauge is embedded in PU which is different to thecommercial strain gauge of sticking to the sample. The metal layer of strain gauge used in this studyis gold. The overall size of the designed strain gauge is 1 mm x 1 mm x 0.1 μm and the resistancevalue was measured to be 200±30Ω. The static test of strain gauge without damp proof shows thatgauge sensitivity G was measured to be 4 and 1.8 when strain range is less than 1% and between1-1.5%, respectively. While, the static test of strain gauge with damp proof shows that gaugesensitivity G was measured to be 2.6 when strain range is less than 1.2%. Dynamic test of straingauge was also applied in this study
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.270.pdf
Permalink