Chaitanya Krishna Vallabh

My research expertise lies in the broad area of system dynamics and vibrations with specialization in microparticle adhesion and manipulation using acoustic techniques coupled with laser interferometry. My research experience and interests also include additive manufacturing (AM), advanced, smart, and scalable manufacturing methods, elastic wave propagation, ultrasonic non-destructive evaluation, structural health monitoring (SHM), systems integration, bigdata analysis, image and signal processing, deep learning, and microelectromechanical systems (MEMS).

Current Research Interests: Advanced manufacturing, additive manufacturing, engineering education, and bigdata analysis

Chaitanya Krishna (CK) Vallabh graduated with a PhD in Mechanical Engineering from Clarkson University in 2017. Prior to his position at Stevens, he was a postdoctoral research associate (2019 - 2022) in the Department of Mechanical Engineering and Materials Science at University of Pittsburgh - where his research focus was on developing processing monitoring methods for laser powder bed fusion additive manufacturing along with developing sensing modalities for polymer 3D printing. From 2018 - 2019, He was a postdoctoral researcher at The Ohio State University (Department of Mechanical and Aerospace Engineering), where his research focus was on (1) developing MEMS-based sensor system for biological applications and (2) autonomous additive manufacturing.

Dr. Vallabh is also a Center for the Integration of Research, Teaching and Learning (CIRTL) certified STEM teaching associate and currently working towards the next levels of certification. He is interested and passionate about engineering education research and would like to develop evidence based teaching methodologies for STEM education with focus on diversity, equity, and inclusion.

Postdoctoral Research Associate August 2019 –August 2022
Dept. of Mechanical Engineering and Materials Science, University of Pittsburgh
Postdoctoral Researcher January 2018 – May 2019
Dept. of Mechanical and Aerospace Engineering, The Ohio State University
Graduate Teaching Assistant August 2012 – December 2017
Dept. of Mechanical and Aeronautical Engineering, Clarkson University
Research Intern May 2011 – May 2012
Advanced System Laboratories (ASL), Defence Research and Development Organisation (DRDO), Hyderabad, India

Zhao, X., & Vallabh, C. K. P. (2024). U.S. Patent No. 11,874,176. Washington, DC: U.S. Patent and Trademark Office.

Selected Publications:

(Google Scholar: https://scholar.google.com/citations?user=-o1GnvcAAAAJ&hl=en&oi=ao)

Zhang, Haolin, Alexander N. Caputo, Chaitanya Krishna Prasad Vallabh, et al. "Evaluating and correlating multimodal process dynamics, microstructure features, and mechanical properties in laser powder bed fusion." Journal of Manufacturing Processes 127 (2024): 511-530.

Fontaine, Maxine, and Chaitanya Krishna Vallabh. "Correlating Common Errors in Statics Problem Solving with Spatial Ability." 2024 ASEE Annual Conference & Exposition. 2024.

Vallabh, Chaitanya Krishna Prasad, et al. "Melt pool width measurement in a multi-track, multi-layer laser powder bed fusion print using single-camera two-wavelength imaging pyrometry." The International Journal of Advanced Manufacturing Technology 132.5 (2024): 2575-2585.

Akhavan, Javid, Jiaqi Lyu, Youmna Mahmoud, Ke Xu, Chaitanya Krishna Prasad Vallabh, and Souran Manoochehri. "Dataset of in-situ coaxial monitoring and print’s cross-section images by Direct Energy Deposition fabrication." Scientific Data 10, no. 1 (2023): 776.

Zhang, Haolin, Chaitanya Krishna Prasad Vallabh, and Xiayun Zhao. "Machine learning enhanced high dynamic range fringe projection profilometry for in-situ layer-wise surface topography measurement during LPBF additive manufacturing." Precision Engineering 84 (2023): 1-14.

Zhang, Haolin, Chaitanya Krishna Prasad Vallabh, and Xiayun Zhao. "Influence of spattering on in-process layer surface roughness during laser powder bed fusion." Journal of Manufacturing Processes 104 (2023): 289-306.

Lyu, Jiaqi, Javid Akhavan, Youmna Mahmoud, Ke Xu, Chaitanya Krishna Prasad Vallabh, and Souran Manoochehri. "Real-time monitoring and Gaussian process-based estimation of the melt pool profile in direct energy deposition." In International Manufacturing Science and Engineering Conference, vol. 87233, p. V001T01A024. American Society of Mechanical Engineers, 2023.

Caputo, Alexander, Richard W. Neu, Chaitanya Krishna Vallabh, Xiayun Zhao, and Haolin Zhang. "Investigating the Influence of Build Parameters and Porosity on Fatigue of AM IN718." In TMS Annual Meeting & Exhibition, pp. 571-591. Cham: Springer Nature Switzerland, 2023.

Zhang, Haolin, Chaitanya Krishna Prasad Vallabh, and Xiayun Zhao. "Registration and fusion of large-scale melt pool temperature and morphology monitoring data demonstrated for surface topography prediction in LPBF." Additive Manufacturing 58 (2022): 103075.

Vallabh, Chaitanya Krishna Prasad, Soumya Sridar, Wei Xiong, and Xiayun Zhao. "Predicting melt pool depth and grain length using multiple signatures from in-situ single camera two-wavelength imaging pyrometry for laser powder bed fusion." Journal of Materials Processing Technology 308 (2022): 117724.

Vallabh, Chaitanya Krishna Prasad, and Xiayun Zhao. "Melt pool temperature measurement and monitoring during laser powder bed fusion based additive manufacturing via single-camera two-wavelength imaging pyrometry (STWIP)." Journal of Manufacturing Processes 79 (2022): 486-500.

Vallabh, Chaitanya Krishna Prasad, Yue Zhang, and Xiayun Zhao. "In-situ ultrasonic monitoring for Vat Photopolymerization." Additive Manufacturing 55 (2022): 102801.

Haolin, Zhang*, Vallabh, Chaitanya Krishna Prasad*, Yubo Xiong and Xiayun Zhao, “A systematic study and framework of fringe projection profilometry with improved measurement performance for in-situ LPBF process monitoring” Measurement (2022), in press (* co-first author), DOI: https://doi.org/10.1016/j.measurement.2022.110796

Vallabh, Chaitanya Krishna Prasad, and Xiayun Zhao, “Continuous comprehensive monitoring of melt pool morphology under realistic printing scenarios with laser powder bed fusion” 3D Printing and Additive Manufacturing (2021), http://doi.org/10.1089/3dp.2021.0060

Vallabh, Chaitanya Krishna Prasad, Yubo Xiong and Xiayun Zhao “3D Printing of Liquid Metal EGaIn through Laser Induced Forward Transfer: A proof-of-concept study”, Manufacturing Letters (2021), DOI: 10.1016/j.mfglet.2021.03.004

Vallabh, Chaitanya Krishna Prasad, and Cetin Cetinkaya “Single particle adhesion variability in additive manufacturing powders”, The Journal of Adhesion (2019), DOI: 10.1080/00218464.2019.1622094

Vallabh, Chaitanya Krishna Prasad, and Cetin Cetinkaya. "Adhesion distribution on the surface of a single microparticle." Applied Physics Letters 109.12 (2016): 121602.

Vallabh, Chaitanya Krishna Prasad, James D. Stephens, Grazyna Kmiecik-Lawrynowicz, Santokh Badesha, and Cetin Cetinkaya. "Effect of surface temperature on adhesion of nanoparticle-coated microparticles." Powder Technology 298 (2016): 57-64.

Vallabh, Chaitanya Krishna Prasad, James D. Stephens, and Cetin Cetinkaya. "Effect of surface temperature on microparticle-surface adhesion." Applied Physics Letters 107.4 (2015): 041607.

Vallabh, Chaitanya Krishna Prasad, James D. Stephens, Grazyna Kmiecik-Lawrynowicz, Santokh Badesha, Maura Sweeney, and Cetin Cetinkaya. "Predicting electrostatic charge on single microparticles." Powder Technology 286 (2015): 684-696.

Vallabh, Chaitanya Krishna Prasad, Armin Saeedi Vahdat, and Cetin Cetinkaya. "Charge contribution to patch-charged microparticle adhesion." Applied Physics Letters 105.21 (2014): 211905.

ENGR 211: Statics and Introduction to Engineering Mechanics
ME 261: Mechanics of Materials
ME 361: Design of Machine Components
ME 345: Modeling and Simulation