SelectedWorks - Sunil Kishore Chakrapani

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Selected Works of Sunil Kishore Chakrapani

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About Sunil Kishore Chakrapani

Present	Faculty Member, Iowa State University
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Structures and Materials and Acoustics, Dynamics, and Controls

Inspection and evaluation of dry fibers in thick composites

Center for Nondestructive Evaluation Conference Papers, Posters and Presentations (2012)

Vinay Dayal, Sunil Kishore Chakrapani and Daniel J. Barnard

This paper presents the investigation of dry fibers in thick composites. Dry fibers can be defined as lack of epoxy ...

Inspection of helicopter rotor blades with the help of guided ...

Center for Nondestructive Evaluation Conference Papers, Posters and Presentations (2012)

Daniel J. Barnard, Sunil Kishore Chakrapani and Vinay Dayal

Modern helicopter rotor blades constructed of composite materials offer significant inspection challenges, particularly at inner structures, where geometry and differing ...

Investigation of waviness in wind turbine blades: Structural health monitoring

Center for Nondestructive Evaluation Conference Papers, Posters and Presentations (2012)

Sunil Kishore Chakrapani, Vinay Dayal and Daniel J. Barnard

Waviness in composite wind turbine blades was detected and characterized with the help of air coupled ultrasonics. Based on the ...

Ultrasonic Rayleigh wave inspection of waviness in wind turbine blades ...

Center for Nondestructive Evaluation Conference Papers, Posters and Presentations (2011)

Sunil Kishore Chakrapani, Vinay Dayal, Daniel J. Barnard, Aaron Eldal, et al.

This paper presents the investigation of discrete, out-of-plane waviness in thick composite plates with applications to wind turbine blades. The ...

Ultrasonic testing of adhesive bonds of thick composites with applications ...

Center for Nondestructive Evaluation Conference Papers, Posters and Presentations (2011)

Sunil Kishore Chakrapani, Vinay Dayal, Ryan Krafka and Aaron Eldal

This paper discusses the use of pulse echo based ultrasonic testing for the inspection of adhesive bonds between very thick ...

Investigation of ply waviness in wind turbine blades: Experimental and ...

Graduate Theses and Dissertations (2011)

Sunil Kishore Chakrapani

Composite materials used in fabricating wind turbine blades use large tows, stitched fibers which are relatively thick compared to the ...

Characterization of waviness in wind turbine blades using air coupled ...

Center for Nondestructive Evaluation Conference Papers, Posters and Presentations (2010)

Sunil Kishore Chakrapani, Vinay Dayal, David K. Hsu, Daniel J. Barnard, et al.

Waviness in glass fiber reinforced composite is of great interest in composite research, since it results in the loss of ...