Research

Brief Note on Present Research

Title of the Ph. D. Thesis: ‘Vibration Analysis of Perforated Plates '.

In broad classification my current area of research is vibration analysis of mechanical structures. I am analytical and experimental researcher. During my doctoral research I used the Rayleigh’s, Rayleigh’s-Ritz and Galerkin methods which are scientifically popular techniques to model the dynamic behavior of mechanical systems.

I have developed analytical models for predicting free vibration natural frequencies of the perforated plate. Different types of patterns of circular and square holes are considered. Results obtained from numerical simulation are compared with those obtained experimental and form the FEM analysis. Analytical method provides faster vibration assessment in comparison with commonly used Finite elements method (FEM). This would provide advantage in time critical conceptual design phase. The studies demonstrating practical applicability of the analytical methods to vibration analysis problem of plate with multiple perforations are lacking in professional literature. Present approaches in the literature use homogenization which aims for equivalent stiffness (e.g. E, G, EI) and strength properties that can be used in assessment of structural systems, the response of homogenized solution is often not accurate for dynamic problem. This is where proposed analytical models steps in. Methods proposed During my doctoral research are simple and quick for solutions.

Also expression for modal constant of fundamental frequency of the perforated plate is determined experimentally and by Finite Element method (FEM). The effect of hole geometry, hole size, ligament efficiency and plate support conditions on the dynamic behavior of rectangular plates is studied in combination experimentally and also by using FEM. Expressions are formulated to predict accurately the resonance frequencies of wide range of perforation geometries, for rectangular plates with rectangular penetration pattern for all edges clamped support condition.

Area (s) of Specialization / Research

· Structural Vibration Analysis

Crashworthiness of Vehicles

Materials and Material Testing

Product Design

Research (Ph. D.) Guidance

Sr. No.	Name of student/Scholar	Title of thesis	Status	Co-supervisor and Institute
1	Mr. Hendre Kedar (2016PHXF025G)	Enhancement of Crashworthiness of Automobiles by Reducing Injuries to Upper Extremities and Improved Airbag Characteristics	Ongoing Proposal Accepted on 03\|07\|2017	Prof. D. M. Kulkarni, BITS Pilani, K.K. Birla Goa Campus
2	Mr. Pritam Kulkarni (2018PHXF0036G)	Study on the Effect of Manufacturing Defect on the Fatigue Life of Fiber Reinforced Polymer Composites	Thesis submitted on 29\|12\|2022 to AGSRD. Defense awaited.	Dr. Sandeep Singh, IIT Indore
3	Sudhanwa Kulkarni (2019PHXF0071G)	Crashworthiness Performance Analysis of Collapsible Energy Absorbers Manufactured by Improved Joining Techniques and With Crush Initiators Under Quasi-Static Loading Conditions	Ongoing Proposal Accepted on 24\|05\|2021	NA
4	Ravi Raj B.M. (2019PHXF0041)	Finite element based multiscale modelling of the nonlinear mechanics of two- dimensional noncarbon nanomaterials.	Ongoing Proposal Accepted on 20\|07\|2021	Dr. Sandeep Singh, IIT Indore

Sponsered Research Projects

Sr. No	Title	Cost in Lakh	Month of start/Status	Role as PI/CoPI	Funding Agency
1	Experimental and Computational Study of the Free Transverse Vibration Behaviour of Perforated Cantilever Steel Beam	2	July 2017 Completed	PI	BITS-Pilani
2	Experimental and Numerical Study on Crashworthiness of Aluminium-Composite Collapsible Energy Absorber under Quasi-static Loading.	5.25	Nov 2018 Completed	PI	BITS-Pilani
3	Studies on sustainable eco-friendly solution to replace polyethylene bags/containers used for horticulture applications	1	Feb 2021 Completed	Co PI	Goa Biodiversity Board, Govt. of Goa
4	Realization of Biomimetic Dental Implants in Digital Dentistry	2 Seed Grant	Jan 2021 Completed	Co PI	Biotechnology Industrial Research Assistance Council (BIRAC) Bionest, BITS BIRAC BioNEST
5	Entrepreneur-in-Residence (EiR) program Start Up support from PIEDS,BITS Pilani	4	Dec 2021 Ongoing	PI/Co- Founder	PIEDS,BITS Pilani
6	Indigenous Development of Value Dental Implants for Dentistry	8	Dec 2022 Ongoing	PI/Co- Founder	SISFS , Government of India through BITS Goa Innovation, Incubation and Entrepreneurship Society BGIIES

Project Proposals Submitted

[1]. Title:Experimental and numerical investigations on the influence of thermo-mechanical triggers on the axial crush response of thin-walled rectangular aluminium energy absorbers for the application in vehicle crash-boxes | PI: Dr. Kiran Mali, Co-PI: Prof. D. M. Kulkarni | SERB SURE |Proposed Budget (Rs):22,60,764| proposal ID:SUR/2022/001816 (Ver-1) | Submitted on 19-09-2022

[2]. Title: Realization of patient-specific dental implants made of biomimetic material| AS Co-PI: Dr. Kiran D Mali , Others- PI: Prof. D. M. Kulkarni, Co-PI:Dr. Iniyan Thiruselvam | BIRAC (PACE), Academic Innovation Research (AIR) scheme| Proposal Reference No.: BT/TEMP8872/PACE-28/22 | Proposed Budget (Rs) 37,77,000/- |Proposal Submitted on: 30-11-2022

[3]. Title: Artificial Intelligence assisted surgical procedure for customized patient-specific dental implants using cloud-based automated workflow for Indian patients| PI and Co-founder:Dr. Kiran D Mali , Others- PI: Dr. Iniyan Thiruselvam, Prof. D. M. Kulkarni, | BITS BioCyTiH Foundation, In Bio-Cyber Physical Systems (SMART Bio-CPS)scheme| Proposed Budget (Rs) 10,00,000/- |Proposal Submitted on: 15-02-2023

BITS Pilani