Prof. Ramesh Singh

G. K. Devarajulu Chair Professor

Mechanical Engineering

IIT Bombay, Mumbai, India

Education:

Research Interests:

  • High-speed micromachining

    • The microscale manufacturing poses unique challenges with respect to both machine tool design and the process dynamics. Scaling down the macro processes, such as milling and drilling is extremely difficult due to the orders of magnitude lower stiffness of the tool. The research in this area has culminated in development of first high-speed micromachining center in India which is capable of creation of submicron features with nanometric accuracy. Scientific studies on dynamic stability of high speed micromilling have been carried out. One of the active research areas is employing signal processing techniques, such as wavelet transform and Hilbert-Huang transform in conjunction with Machine Learning for real-time chatter detection and control of high speed macro/micro machining.

  • Flexible reconfigurable fiber laser based materials processing

    • This work is focused on developing flexible reconfigurable platforms with fiber lasers. These flexible systems can be used for hybrid machining, welding, localized hardening/texturing, cleaning, deep-hole microdrilling and directed energy deposition (DED) using multiple process fibers/optics with a single continuous/quasi-continuous wave source. One of the thrust areas of the lab is repair and restoration of dies and aerospace structures via laser DED. A unique concept of critical linear deposition density has been proposed for obtaining compressive residual stresses in DED based on fully-coupled metallurgical and thermomechanical FE model. Based on this model, dimensional/non-dimensional process maps have been developed. Our lab is doing some pioneering work in developing sustainable “science-enabled-technology” for laser additive restoration.

  • Systems integration and product development

    • One of the biggest challenges the Indian Industry faces is the access to technology for special purpose machines and systems integration. There is a huge technology deficit that exists in India and our lab's work in the development of technologies backed by solid scientific understanding aims to bridge this gap. Our lab has developed various special purpose machines for industries and strategic sector, such as, Conformal Hydrodynamic Nanopolishing Machine, Automated Robotic Laser Vent Cleaning System, Vision Based Centering System for Tyre Building Machine, Laser Mold Cleaning System, Micromachined Optical Codes for Gems and Jewelery etc. Our lab encourages entrepreneurship and has mentored two student start-ups for special purpose machines.

  • Finite element modeling

    • One of key interest areas is finite element modeling of different manufacturing processes, such as machining, flow forming, ring rolling, pilgering etc. Another active field in modeling is multiscale modeling of damage evolution in composites. A new RVE-based approach called multi-fiber multi-layer representative volume element (M2RVE) to capture all the main damage mechanisms have been developed. We are also interested in modeling the tool-tissue interactions when different tissues are punctured or indented with a surgical tool.

Awards and Honors

  • Swarnajayanti Fellowship in Engineering Sciences, DST, 2014-15
  • North American Manufacturing Research Institute(NAMRI)/Society of Manufacturing Engineers(SME) Outstanding Paper Award in NAMRC 44, June 2016
  • Associate Editor, ASME Journal of Micro and Nano-Manufacturing
  • Associate Editor, IISE Transaction, Design and Manufacturing
  • Member, Editorial Board of Nature Scientific Reports
  • Member, Editorial Board of JMST Advances
  • Member, Editorial Board of International Journal of Precision Technology
  • Visiting Professor, Arts et Metiers, Campus of Cluny, Cluny, France
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