Developing Harmonic Shear Wave Elastography (HSWE) to assess tissue stiffness for breast cancer detection:

• • Constructed a 3D Finite Element framework in LS-Dyna for simulating HSWE in breast tissue with tumors

  • Implemented a computationally efficient 2D Finite Element framework in MATLAB to characterize tissue stiffness via an Inverse formulation

  • Utilized a Physics Informed Neural Network to determine tissue viscoelastic shear moduli in 3D Finite Element-based in silico and CIRS phantom experiments, demonstrating the feasibility 

• Working on Pulse Wave Inverse Problem (PWIP) to assess vascular walls with atherosclerotic plaques: 

  • Applied a Physics Informed Neural Network to Finite Difference-based in silico and PVA-based phantom experiment data, showcasing feasibility

Executed data processing and estimated arterial shear moduli from the SWE experiment performed on the ex-vivo porcine aorta at Mayo Clinic

Received experience in SWE and other ultrasound modality experiments

Developed a framework based on discrete element modeling for localized failure in concrete

• • Modeled aggregates as a discrete arbitrary shaped rigid body 

  • Simulated dynamic packing of the assemblage of aggregates as the free fall of the aggregates following Newtonian Dynamics using the Discrete Element Model (DEM)

  • Incorporated cohesive constitutive behavior in the DEM model and then calibrated interfacial stiffness as a part of material modeling of concrete based on strain energy

  • Incorporated fracture energy-based damage constitutive behavior allowing both un-coupled damage as well as coupled damage

  • Performed load controlled and displacement controlled (numerical) tests on concrete cubes for evaluation of global response and obtaining crack patterns

  • Studied the effect of meso level geometric parameters like size, angularity, and flakiness on the macroscopic response of concrete 

Implementation of concrete damaged plasticity model in ABAQUS

Size effect study for concrete cylinders with height to diameter ratios as 2, 4 and 6

Size effect study of concrete using 3-point bending test for a single notched beam with size ratios as 1:1, 1:2, 1:4, 1:8

Study of shear band formation and mesh dependent response of concrete 

Implementation of Excel VBA interface tool for input files generation for FAST (Fatigue Aerodynamic Structure Turbulence) module developed by NREL (National Renewable Energy Laboratory), USA

Determination of aerodynamic loads & responses on wind turbines

FEM modeling of the wind turbine blade in ANSYS using the NUMAD tool developed by Sandia National Laboratories & then FE analysis which includes modal analysis, buckling analysis, static & transient analysis

Validation of the natural frequencies, tip displacements, blade root shear force and bending moments with the results presented in FAST module 

Study of the fixed offshore structures e.g. Jacket structures and its different parts along with the structural analysis as per the API – WSD and ISO:19902-2007 codes

Pushover analysis in ANSYS Mechanical FE Package for determination of collapse load

System based reliability analysis accounting different uncertainties in hydrodynamic parameters and geometric & material properties of the Jacket structure

Determination of the Reserve Strength Ratio (RSR) which is the first step towards the life extension of the existing jacket structures

Member importance study in order to account the difficulties accessing the structural details which is below the mean sea level during inspection 

Implementation of Fracture Mechanics (FM) based semi-elliptical crack growth model using the Paris equation

Development of the regression equation to make the fracture mechanics based model computationally more efficient for the further analysis

Calibration of FM model with conventional S-N curve based model & then inspection planning using Bayesian Updating scheme

Validation of the model with the published results by ABS & one case study for existing oil tanker

Parametric study with different inspection strategies containing NDT & visual inspections along with the cost benefit analysis 

Implementation of Finite Element (FE) based codes in Matlab for beam element analysis using Euler-Bernoulli beam model and Timoshenko beam model

Development of FE based tool for the shaft alignment analysis in ship structures in MS EXCEL VBA Macro

Validation of the tool with several case studies of shaft alignments in oil tanker, bulk carrier & LNG carrier