TY - GEN
T1 - Shear stress sensing with elastic microfence structures
AU - Cisotto, Alexxandra
AU - Palmieri, Frank L.
AU - Saini, Aditya
AU - Lin, Yi
AU - Thurman, Christopher S.
AU - Kim, Jinwook
AU - Kim, Taeyang
AU - Connell, John W.
AU - Zhu, Yong
AU - Gopalarathnam, Ashok
AU - Jiang, Xiaoning
AU - Wohl, Christopher J.
N1 - Publisher Copyright:
© 2015, American Institute of Aeronautics and Astronautics Inc, AIAA.
PY - 2015
Y1 - 2015
N2 - In this work, elastic microfences were generated for the purpose of measuring shear forces acting on a wind tunnel model. The microfences were fabricated in a two part process involving laser ablation patterning to generate a template in a polymer film followed by soft lithography with a two-part silicone. Incorporation of a fluorescent dye was demonstrated as a method to enhance contrast between the sensing elements and the substrate. Sensing elements consisted of multiple microfences prepared at different orientations to enable determination of both shear force and directionality. Microfence arrays were integrated into an optical microscope with sub-micrometer resolution. Initial experiments were conducted on a flat plate wind tunnel model. Both image stabilization algorithms and digital image correlation were utilized to determine the amount of fence deflection as a result of airflow. Initial free jet experiments indicated that the microfences could be readily displaced and this displacement was recorded through the microscope.
AB - In this work, elastic microfences were generated for the purpose of measuring shear forces acting on a wind tunnel model. The microfences were fabricated in a two part process involving laser ablation patterning to generate a template in a polymer film followed by soft lithography with a two-part silicone. Incorporation of a fluorescent dye was demonstrated as a method to enhance contrast between the sensing elements and the substrate. Sensing elements consisted of multiple microfences prepared at different orientations to enable determination of both shear force and directionality. Microfence arrays were integrated into an optical microscope with sub-micrometer resolution. Initial experiments were conducted on a flat plate wind tunnel model. Both image stabilization algorithms and digital image correlation were utilized to determine the amount of fence deflection as a result of airflow. Initial free jet experiments indicated that the microfences could be readily displaced and this displacement was recorded through the microscope.
UR - http://www.scopus.com/inward/record.url?scp=85088359075&partnerID=8YFLogxK
U2 - 10.2514/6.2015-2407
DO - 10.2514/6.2015-2407
M3 - Conference contribution
AN - SCOPUS:85088359075
SN - 9781624103643
T3 - 31st AIAA Aerodynamic Measurement Technology and Ground Testing Conference
BT - 31st AIAA Aerodynamic Measurement Technology and Ground Testing Conference
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - 31st AIAA Aerodynamic Measurement Technology and Ground Testing Conference, 2015
Y2 - 22 June 2015 through 26 June 2015
ER -