A5057163811- Composite Structure Analysis and Optimization
- Microstructure and mechanical properties
- Structural Analysis and Optimization
- Composite Material Mechanics
- Mechanical Behavior of Composites
- Metallurgy and Material Forming
- Microstructure and Mechanical Properties of Steels
- Aluminum Alloy Microstructure Properties
- Structural Load-Bearing Analysis
- Nonlocal and gradient elasticity in micro/nano structures
- Advanced MEMS and NEMS Technologies
- High Temperature Alloys and Creep
- Mechanical and Optical Resonators
- Advanced Materials and Mechanics
- Numerical methods in engineering
- Vibration and Dynamic Analysis
- Force Microscopy Techniques and Applications
- Polymer composites and self-healing
- Topology Optimization in Engineering
- Aluminum Alloys Composites Properties
- Cellular and Composite Structures
- Structural Health Monitoring Techniques
- High-Velocity Impact and Material Behavior
- Probabilistic and Robust Engineering Design
- Metal Forming Simulation Techniques
Indian Institute of Technology Bombay
2016-2025
Texas A&M University
2006-2011
Indian Institute of Science Bangalore
2004
In this work, the free vibration characteristics of flexbeam like structures, typically used in helicopter main or tail rotor blades, are investigated. The tapering effect these laminated composite structures is introduced by terminating plies, which act as potential delamination sites. Delamination and uncertainties material properties at various scales influence their dynamic behavior. variational asymptotic method (VAM) a mathematical framework to develop model tapered beam with...
Abstract Mechanism based Discrete Dislocation Dynamics (DDD) framework for modeling plasticity in metallic materials with the morphology of underlying grains resembling an actual microstructure is extended to incorporate a second-phase. The formulation includes mechanisms that account dislocation self-interactions and interactions grain boundaries vis-a-vis boundary slip transmission. within constituent result entangling dislocations, forming locks essential controlling various hardening...
Abstract In this work, the variational asymptotic method (VAM) based homogenization framework is used for first time to determine equivalent elastic stiffness tensor of auxetic materials. The proposed allows structural elements unit cell naturally incorporate rotational degrees-of-freedom, without any ad-hoc assumptions. overall macroscale homogenized response cells considered be fully anisotropic; specific possible responses, representative orthotropy or transverse isotropy emerge from...
Abstract This study presents a numerical framework for unidirectional shape memory polymer-based composite (SMPC) corrugated structure. The combines an empirically modified constitutive model of polymer (SMP) with temperature-dependent laminate theory. Model parameters in the SMP relation are determined and calibrated from dynamic mechanical analysis tests. Subsequently, implementation is validated experimental results three-point bending test. was followed by simulations to investigate...
Classical approaches to enhance auxeticity quite often involve exploring or designing newer architectures. In this work, simple geometrical features at the member level are engineered exploit non-classical nonlinearities and improve auxetic behaviour. The structural elements of unit cell here represented by thin strip-like beams, thin-walled tubular beams. resulting nonlinear stiffness enhances lattices, especially under large deformations. To quantify influence proposed on Poisson's ratio,...
Abstract A phenomenological model of plastic deformation is proposed, which captures the size-dependence flow strength and work-hardening in pure FCC crystalline materials. Guided by discrete dislocation dynamics analyses, treatment based on two structural variables determining mechanical state material. complete description behaviour achieved, giving inherently different statements for evolution structure, supplemented a new kinetic equation, specifies hardening law differential form at...
This paper presents a single variable new first-order shear deformation plate theory with only one fourth-order partial governing differential equation. It may be noted that, of Mindlin has three coupled equations involving unknown functions. Even recently developed two uncoupled functions for static problems. The displacement the proposed give rise to constant transverse strains through thickness and, as is case theory, also requires correction factor. equation, expressions moments and...