Sunil Chakrapani

Sunil Chakrapani

Sunil Chakrapani

Assistant professor


Dr. Sunil Kishore Chakrapani is an Assistant Professor in the Department of Electrical and Computer Engineering with a joint appointment in the Department of Mechanical Engineering at Michigan State University, East Lansing USA. He graduated from Iowa State University with PhD and MS majoring in Engineering Mechanics. Subsequently he spent three years working as a Postdoc at the Center for NDE Iowa State restarting the nonlinear ultrasonics group. Dr. Chakrapani has over 10 years of experience in Nondestructive Evaluation working at various labs including both the Center for NDE at Iowa State and at Indian Institute of Technology Madras. Dr. Chakrapani’s research interests include:


- Nonlinear ultrasonics 

  • Nonlinear vibrations and ultrasonic wave propagation
  • Nonlinear material property characterization

- Nondestructive material characterization and evaluation

  • Inversion of material stiffness
  • Ultrasonic attenuation

- Sensor Development

  • Air-coupled ultrasonics
  • Structural Health monitoring systems
  •  Transducer characterization and calibration

- Finite element modeling

  • Composites modeling 
  • Numerical simulation of ultrasonic wave propagation 
  • NDE driven design 

- Composite materials: Design, testing, and NDE

Research Area
Research Excellence Award from Iowa State University (2014)
B.E, Mechanical Engineering, Anna University, Chennai, India
M.S, Engineering Mechanics, Iowa State University
PhD, Engineering Mechanics, Iowa State University
S. K. Chakrapani, (2017). "Numerical study of Rayleigh wave propagation along a horizontal semi-infinite crack buried in half-space", J. Acoust. Soc. Am, Vol. 141(1), January 2017, 137-146.
S. K. Chakrapani, (2017). "Nonlinear laminated plate theory for determination of third order elastic constants and acoustic nonlinearity parameter of fiber reinforced composites", Composite Structures, Vol. 180, pp: 276-285 (2017)
S. K. Chakrapani, D. Barnard, “Determination of acoustic nonlinearity parameter (beta) using nonlinear resonance ultrasound spectroscopy: Theory and experiment”, J. Acoust. Soc. Am, Vol 141(2), February 2017, 919-928
S. K. Chakrapani, D. Barnard, V. Dayal, “Influence of laminate sequence and fabric type on the inherent acoustic nonlinearity in carbon fiber reinforced composites”, J. Acoust. Soc. Am, Vol 139(5), May 2016, 2310-2319
S. K. Chakrapani, V. Dayal, “The interaction of Rayleigh waves with delaminations in composite laminates”, J. Acoust. Soc. Am. Vol. 135, Issue. 5, pp: 2646-2653, DOI:
S. K. Chakrapani, D. Barnard, V. Dayal, “Nondestructive evaluation of helicopter rotor blades using guided Lamb modes”, Ultrasonics, Vol. 54, Issue. 3, pp: 826-833(2014) DOI: