Shear Stress Sensing with Elastic Microfence Structures

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Shear Stress Sensing with Elastic Microfence Structures

Cisotto, Alexxandra / Palmieri, Frank L. / Saini, Aditya / Lin, Yi / Thurman, Christopher S / Kim, Jinwook / Kim, Taeyang / Connell, John W. / Zhu, Yong / Gopalarathnam, Ashok / ... [more]

Abstract

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.

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Document information

Title :

Shear Stress Sensing with Elastic Microfence Structures

Contributors:

Cisotto, Alexxandra (author) / Palmieri, Frank L. (author) / Saini, Aditya (author) / Lin, Yi (author) / Thurman, Christopher S (author) / Kim, Jinwook (author) / Kim, Taeyang (author) / Connell, John W. (author) / Zhu, Yong (author) / Gopalarathnam, Ashok (author)

Conference:

AIAA Aviation 2015 Aerodynamic Measurement Technology and Ground Testing Conference ; 2015 ; Dallas, TX, United States
AIAA Aviation 2015 ; 2015 ; Dallas, TX, United States

Publication date :

2015-06-22

Type of media :

Conference paper

Type of material :

No indication

Language :

English

Keywords :

Aerodynamics