vollmer-gray

Manoj K Rangapuram
Mechanical Engineermrangapuram@vglabs.com

TECHNICAL AREAS OF SPECIALIZATION
  • Material Failure Analysis
  • Mechanical Failure Analysis
  • Metallurgical Failure Analysis
  • Corrosion Failure Analysis
  • Water System Component Failure Analysis
  • Physical, Mechanical, and Environmental Testing of Polymeric Materials
  • Fatigue and Fracture Mechanics of Polymers and Composites
  • Paint and Coating Failure Analysis
EDUCATION
Doctor of Philosophy, Mechanical Engineering
Missouri University of Science and Technology, Rolla, Missouri (2023)
Master of Science, Mechanical Engineering
Missouri University of Science and Technology, Rolla, Missouri (2019)
Bachelor of Science, Mechanical Engineering
Jawaharlal Nehru Technological University, Kakinada, India (2017)
PROFESSIONAL EXPERIENCE

Mechanical Engineer, Vollmer-Gray Engineering Laboratories (June 2023 to present): Material and mechanical engineering failure analysis including plastics, composites, elastomers and metals. Mechanical, analytical, chemical and environmental testing of materials. Water system component failure analysis. Paint and protection coatings failure analysis and testing.

Graduate Research Assistant, Missouri University of Science and Technology-Rolla, Missouri, (August 2017 to May 2023)

PROJECTS

Process Modeling and Simulation of Additive Manufacturing of Metals, DEVCOM Army Research Laboratory, October 2020 – May 2023.

Predicting Performance of Additively Manufactured Metal Structures for Aerospace Applications, Spirit AeroSystems, December 2019 – May 2023.

Performance Evaluation of Composite Sandwich Structures with Additively Manufactured Aluminum Honeycomb Cores, Spirit AeroSystems, December 2021 – May 2023.

Calibration of the Johnson-Cook Material Model for Additively Manufactured 304L SS Parts, Missouri S&T, January 2022 – May 2023.

Additively Manufactured Carbon Fiber- reinforced Thermoplastic Composite Mold Plates for Injection Molding Process, Impossible Objects, December 2019 – May 2023.

Tool Part Interaction and Warpage Study of Additively Manufactured Molds, Impossible Objects, May 2020 – May 2023.

Microwave Curing of Carbon-fibre Composites, Naval Air Systems Command, May 2018 – May 2023.

A Multiphysics Analysis Tool for Autoclave Processing of Composite Parts (MATAPro), Intelligent Automation, Inc. and DOD-SBIR, September 2021 – January 2022.

Soy-Based Structural Insulated Panels for Energy Efficient Housing, USDA-NIFA-SBIR, May 2019 – May 2020.

Performance Evaluation of BMI Resin System for Thin-Ply Composites, NASA-SBIR-STTR, October 2018 – October 2019.

HONORS

Graduate Research Fellowship, Missouri University of Science and Technology-Rolla (2019 to 2023)

Graduate Teaching Fellowship, Missouri University of Science and Technology-Rolla (2020 to 2023)

PUBLICATIONS

M. Rangapuram, M. Yang, S. Babalola, J.W. Newkirk, L. N. Bartlett, F. F. Liou, and K. Chandrashekhara, "A Multiphysics Modeling Approach to Assess the Powder Bed Characteristics of High Strength Steel in Selective Laser Melting”, Solid Freeform Fabrication 2022: Proceedings of the 33rd Annual International Solid Freeform Fabrication Symposium – An Additive Manufacturing Conference, 2022.

M. Rangapuram, S. K. Dasari, S. P. Isanaka, M. F. Buchely, J. W. Newkirk and K. Chandrashekhara, "Calibration of the Johnson-Cook Material Model for Additively Manufactured 304L SS Parts: Modeling and Experiments,” Solid Freeform Fabrication 2022: Proceedings of the 33rd Annual International Solid Freeform Fabrication Symposium – An Additive Manufacturing Conference, 2022.

M. Rangapuram, S. Babalola, J. W. Newkirk, L. N. Bartlett, F. F. Liou, K. Chandrashekhara, and S. R. Cluff, “Multiphysics Modeling and Experimental Validation to Assess the Powder Bed Characteristics of High Strength Steel in Selective Laser Melting,” (submitted to Progress in Additive Manufacturing Journal)

M. Rangapuram, S. K. Dasari, H. Haffner, S. P. Isanaka, M. F. Buchely, J. W. Newkirk and K. Chandrashekhara, “Investigation of Build Direction on Johnson-Cook Model for Additively Manufactured 304L Stainless Steel: Modeling and Experiments,” (to be submitted to the International Journal of Advanced Manufacturing Technologies)

M. Rangapuram, S. K. Dasari, J. W. Newkirk, K. Chandrashekhara, H. Misak, P. R. Toivonen, D. Klenosky, U. Tanner, and J. Sam, “Performance Evaluation of Composite Sandwich Structures with Additively Manufactured Aluminum Honeycomb Cores with Increased Bonding Surface Area,” (submitted to the Journal of Polymer Composites)

S. Dasari, M. Rangapuram, and K. Chandrashekhara, “Multiphysics Prediction Model of Microwave Curing for Thick Polymer Composites,” Proceedings of the Composites and Advanced Materials Expo (CAMX) Conference, Anaheim, CA, September 23-26, 2019.

O. Fashanu, M. Rangapuram, A. Abutunis, J. Newkirk, K. Chandrashekhara, " Mechanical Performance of Sandwich Composites with Additively Manufactured Triply Periodic Minimal Surface Cellular Structured Core," Journal of Sandwich Structures & Materials, July 2021. (doi:10.1177/10996362211037012)

S.K. Dasari, M. Rangapuram, O. Fashanu, K. Chandrashekhara, N. Iyyer, N. Phan, “Manufacturing and Experimental Evaluation of Microwave Cured Carbon/Epoxy Composites,” Applied Composite Materials Journal, vol. 28, pp. 2087-2103, 2021.

C. Bivens, A. Wood, D. Ruble, M. Rangapuram, S. K. Dasari, K. Chandrashekhara, and J. DeGrange “Additively Manufactured Carbon Fiber- reinforced Thermoplastic Composite Mold Plates for Injection Molding Process,” (Applied Composite Materials Journal – In review)

S. R. Cluff, C. M. Mock, B. A. McWilliams, and M. Rangapuram, “Prediction of Prior Austenite Grain Size and Morphology as a Function of Processing Parameters in AF9628 Steel Processed via Directed Energy Deposition,” The proceedings of the Department of Defense Steel Summit-2022.

PRESENTATIONS

Investigation of the Role of Surfactants on the Properties of Soy-based Polyurethane Foam, Proceedings of the Composites and Advanced Materials Expo (CAMX) Conference, Dallas, TX, October 15-18, 2018.

A Multiphysics Modeling Approach to Assess the Powder Bed Characteristics of High Strength Steel in Selective Laser Melting, Solid Freeform Fabrication 2022: Proceedings of the 33rd Annual International Solid Freeform Fabrication Symposium, Austin, TX, July 25-27, 2022.