BITS Faculty Publications: Recent submissions

Now showing items 1-20 of 11461

Tribological characterization of PTFE composites for ball bearing applications

Belgamwar, Sachin U. (Taylor & Francis, 2024-11)

Polymer-based ball bearings have emerged as a replacement for metal-based bearings in certain applications. They have recently gained attention due to their low weight-to-strength ratio, self-lubrication properties, and ...
Experimental investigation of pool boiling heat transfer on CU─AI2O3 composite coated patterned surfaces using refrigerant R-134A

Belgamwar, Sachin U. (Wiley, 2024-11)

The present study investigates pool boiling heat transfer (PBHT) of R-134a on Cu─Al2O3 composite-coated patterned surfaces (CPSI, CPSII, CPSIII, and CPSIV). Using a wire EDM method, four different types of copper patterned ...
Assessment of polytetrafluoroethylene composites for deep groove ball bearing applications through free run and rolling contact fatigue tests

Belgamwar, Sachin U. (Springer Nature, 2025-03)

Polytetrafluoroethylene (PTFE) is widely used in tribological applications. However, its usage in the ball-bearing application has not been explored. The present study investigates the usage of PTFE composites for deep ...
PTFE/carbon composite radial deep groove ball bearings: Part 1–tribological characterization suitable for ball bearing applications

Belgamwar, Sachin U. (Sage, 2025-05)

Polytetrafluoroethylene (PTFE) is a self-lubricating, highly stable, high-performing polymer that has expanded its usage in bearing tribology. However, its application in ball bearings is still limited. This article explores ...
Pool boiling heat transfer enhancement on micro- and nano-structured copper surface

Belgamwar, Sachin U. (Springer, 2025-04)

As the power requirements of industrial and electronic equipment continue to increase, thermal management is becoming more and more important. BHT, or pool boiling heat transfer, is acknowledged as an effective technique ...
Critical review of reinforcement effect in peek tribology and its usage in biomedical, coating and bearing applications

Belgamwar, Sachin U. (Taylor & Francis, 2025-01)

Polyetheretherketone (PEEK) is an ultra-high-performance polymer renowned for its excellent wear resistance, making it widely used in tribological applications. However, its high coefficient of friction (COF) can detract ...
PTFE/carbon composite radial deep groove ball bearings: Part 2 – fabrication and analysis of bearings for characteristics

Belgamwar, Sachin U. (Sage, 2025-08)

Tribological characterization was carried out in part 1 of the paper on pure PTFE (PTFE) and 25% carbon-filled PTFE (CR25) polymers through the ball-on-disc test to determine the suitability of the material for ball-bearing ...
Tribological behavior of PEEK reinforced with PTFE, carbon fiber, and graphite composite suitable for deep groove ball bearing applications

Belgamwar, Sachin U. (IOP, 2025-09)

The utilisation of polymer in the bearing application has become an alternative to metal-based bearings. The proposed work explores the feasibility of polyetheretherketone (PEEK) composites for ball-bearing applications. ...
Experimental diagnostics of PEEK reinforced with PTFE, carbon fiber, and graphite composite deep groove ball bearings for characteristics through vibration signal processing

Belgamwar, Sachin U. (IOP, 2025)

Polyetheretherketone (PEEK) is a high-performance polymer commonly used in tribology applications due to its exceptional properties. This study examines the feasibility of utilising PEEK and PEEK reinforced by 10% of each ...
Design for manufacturability in additive manufacturing using a graph based approach

Ranjan, Rajit (ASME, 2015-09)

Additive Manufacturing (AM) processes are used to fabricate complex parts using a layer by layer approach. This enables designers to be more creative with their designs and build parts which may be difficult to manufacture ...
Integration of design for manufacturing methods with topology optimization in additive manufacturing

Ranjan, Rajit (ASME, 2017)

Additive manufacturing (AM) processes are used to fabricate complex geometries using a layer-by-layer material deposition technique. These processes are recognized for creating complex shapes which are difficult to manufacture ...
Octree data structure for support accessibility and removal analysis in additive manufacturing

Ranjan, Rajit (Elsevier, 2018-08)

Metal Additive Manufacturing (AM) processes have made it possible to build parts with complex geometric features by adopting a layer-by-layer approach. However, additional support structures are needed to support overhanging ...
New support structures for reduced overheating on downfacing regions of direct metal printed parts

Ranjan, Rajit (2019)

In Laser Powder Bed Fusion (LPBF), the downfacing surfaces usually have increased surface roughness and reduced dimensional accuracy due to local overheating and warpage. To partially overcome this a new supporting structure ...
A mold insert case study on topology optimized design for additive manufacturing

Ranjan, Rajit (2019)

The Additive Manufacturing (AM) of injection molding inserts has gained popularity during recent years primarily due to the reduced design-to-production time and form freedom offered by AM. In this paper, Topology Optimization ...
Improving the manufacturability of metal AM parts

Ranjan, Rajit (Mikroniek, 2019)

Numerous challenges of additive manufacturing (AM) are tackled in the European Horizon 2020 project PAM^2 by studying and linking every step of the AM process cycle. For example, PAM^2 researchers from the design, processing ...
Topology optimisation techniques

Ranjan, Rajit (CRC Press, 2020)

This chapter presents topology optimisation techniques suitable for designing parts that will be produced by additive manufacturing, with special attention to precision aspects. First, challenges associated with ‘design ...
Fast detection of heat accumulation in powder bed fusion using computationally efficient thermal models

Ranjan, Rajit (MDPI, 2020)

The powder bed fusion (PBF) process is a type of Additive Manufacturing (AM) technique which enables fabrication of highly complex geometries with unprecedented design freedom. However, PBF still suffers from manufacturing ...
A physics-based topology optimization method for enhancing precision in metal am parts

Ranjan, Rajit (TU Delft, 2022)

A physics-based topology optimization method for enhancing precision in metal am parts | TU Delft Repository TU Delft Library search Press enter to search in title/abstract in title/abstract in authors local_library ...
Controlling local overheating in topology optimization for additive manufacturing

Ranjan, Rajit (Springer, 2022-05)

A novel constraint to prevent local overheating is presented for use in topology optimization (TO). The very basis for the constraint is the Additive Manufacturing (AM) process physics. AM enables fabrication of highly ...
Overheating control in additive manufacturing using a 3D topology optimization method and experimental validation

Ranjan, Rajit (Elsevier, 2023-01)

Overheating is a major issue especially in metal Additive Manufacturing (AM) processes, leading to poor surface quality, lack of dimensional precision, inferior performance and/or build failures. A 3D density-based topology ...

Now showing items 1-20 of 11461

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