Research

Comparitive Load vs. Deflection grpahs for Experimental, Analytical and Numerical Model with below figure showing stress concentration comparison between Abaqus results and actual cracking patterns

Load vs. Deflection comparison curves of Experimental, Mathematical and Numerical Model along with stress concentration on Numerical Model and actual cracking in specimen

Structural Analysis and Finite Element Modelling of Flexural Beam

I've worked on development of Analytical and Numerical Modelling of Ferrocement strengthened RC Beam under flexure. Analytical Model has been developed using constitutive model of concrete for stress-strain relationship. Numerical Model of composite section is developed in Abaqus using non-linear properties of concrete and steel. Statistical and Graphical comparison of both models with Experimental results indicates the effectiveness of ferrocement strengthening to RC beam.

During one research project, we had developed prototype of Adjustable Extensometer for bars in tension which can allow bars of diameter ranging from 8mm - 10mm. In this study, the concept of magnetic gripping between bars and notches of extensometer is proposed.

Apart, I've developed a MATLAB code to calculate number of rebars in bundle during a competition under TATA Innoverse program.

Being a Graduate Student, I look forward to work on Computational Solid Mechanics, particularly on analysis of complex structural geometry which can be used as potential habitable zones on Mars and Moon. Apart, my interest also lies in Structural Health Monitoring of Aerospace Panels that may be affected by impact of debris while in transit. Advancing the basic principles of SHM with ultrasonic wave guidance mechanics and through numerical modelling using various FE based methods, I would like to understand effect of impact on Space Probes while entering extra-terrestrial environment such as the one of Mars.

Feature Size Control using Signed-Distance Field based Formulation for xFEM-LevelSet Formulation

Implemented curvature-corrected feature size constraint in linear elasticity-based formulations for 2D and 3D problems. Various continuation strategies both for constraint and penalty-based formulations show the effectiveness of our implementation on various problems such as 2D & 3D cantilever beams, 3D simply supported beams and classic yet hard-to-model force inverter problems.

For industry-grade problems, where the extreme geometric shapes are quite frequent, this method runs into a potential limitation due to sensitivity to curvature noise. Therefore, the curvature investigation using Tikhonov Formulation was carried out to understand the effectiveness. While tikhonov method works for moderate to low curvature geometries, at extreme curvature such as a very high aspect ratio ellipse (2D) or ellipsoid (3D), Tikhonov Stabilization may not be very helpful.

This work was presented at USNCCM 17 recently.

Comparison of optimization results with (top) and without (bottom) feature size control

FEA of Gateway Payload Enclosure System (Artemis) in Association with BioServe Space Technologies, Inc.

Static finite element analysis with quad mesh is done for gateway payload enclosure structure when subjected to abort acceleration amounting to 19g on top of standard payload point-load and moments. Von-mises stresses at the connection points were investigated which shows sensitivity to mesh refinement indicating potential stress singularities.

Eigen Mode Analysis of Hypersonic Aeroshell under Varying Temperature Field

Eigen modes to understand buckling behavior of 3D aeroshell cone structure during hypersonic flight trajectory is investigated under varying temperature field. This work was done in collaboration with Lawrence Livermore National Laboratories.

room_temp_final.avi

Displacement Modes using eigen analysis at room temperature

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