Education
Ph.D., Aeronautics and Astronautics, Purdue University (2004)
M.E., Mechanical Engineering, Indian Institute of Science, Bangalore, India (1998)
B.E., Mechanical Engineering, National Institute of Technology Karnataka, India (1995)
Areas of Expertise
- Computational and experimental fracture mechanics
- Development of Material Models to characterize the behavior
of materials
- Effect of material nonlinearity and environment on fracture
and failure
- Experimental design
- Development of FEA methods to model material and geometric
nonlinearities
- Modeling of contact problems
Technical Qualifications
- Fracture Specimen Testing
Conducted various fracture
tests, namely, CTOA test, J-R test, CTOD test, and SENT test for
various metals and welds. Analysis of experiments for obtaining
nonlinear fracture mechanics material parameters.
- Delamination Fracture in Advanced Al-Li Alloys
Dr.
Kalyanam coordinated the efforts for the development of a
delamination criterion from experimental analysis and numerical
modeling. Incorporated the Yld2004-18p Barlat anisotropic plasticity
model (ABAQUS-UMAT from ALCOA Technical Center, Pittsburgh, USA)
into the WARP3D FEA research code. He characterized the effects of
a delamination crack on the local deformation, stresses, strains,
and fracture toughness. He also coordinated the efforts for
modeling at the meso-scale to identify the effects of grain
microstructure on delamination crack initiation and growth.
- Ductile Fracture in Metallic Alloys at Elevated Temperatures
Experimental setup to test fracture specimens and measure the Crack
Tip Opening Angle (CTOA) during crack growth at various
temperatures (RT to 600 0C) for steel and aluminum alloys was
developed by Dr. Kalyanam. CTOA was applied to predict the crack
growth and failure in ductile materials. Numerical simulations that
use the CTOA - crack growth curves in conjunction with ABAQUS was
conducted to simulate the deformation in thin-walled cylinders
subjected to internal pressures and to predict the burst pressures.
- Fracture of Piezoelectric Materials
Dr. Kalyanam developed
an ABAQUS - UEL to model the electrical permeability of a dielectric
medium, present in the crack cavity of a piezoelectric fracture
specimen during experimentation. A gradual polarization switching
(GPS) material model was formulated to capture the nonlinear
polarization switching behavior exhibited by polycrystalline
piezoceramics. GPS material model is incorporated in a numerical
code to work in conjunction with ABAQUS to analyze piezoceramics
under biaxial electromechanical loads and the fracture behavior
piezoceramics. Developed an experimental setup for observing the
evolution of domain switching in single crystal piezoelectric
materials subjected to electrical loads.
- Modeling of Contact Problems
A finite deformation solution
algorithm for contact problems using a planar three node gap element
technique was implemented by Dr. Kalyanam in FEAP. The algorithm is
capable of analyzing planar frictionless, sticking and sliding
frictional contact problems. The gap element was used to analyze
static and dynamic contact problems.
- Manufacture of Hydraulic Cylinders
Dr. Kalyanam worked as
a lead engineer for verification of drawings, process layouts and
planning of the production of hydraulic cylinders for fork lifts. He
led the efforts for improving the production process plans to
achieve the required quality standards.
Professional Affiliations
- American Society of Mechanical Engineers
- American Society of Biomechanics
Prior Professional Experience
Prior to joining the Engineering Mechanics Corporation of Columbus
in October 2009, Dr. Kalyanam was a Postdoctoral Researcher in the
Department of Industrial, Welding and Systems Engineering at The
Ohio State University from Feb. to Sept., 2009 and worked in the
area of fracture testing and modeling for weld materials.
Dr. Kalyanam worked from 2006 to 2008 at a Visiting Research
Assistant Professor in the Bioengineering Dept. at the University of
Illinois at Urbana-Champaign in the area of poro-viscoelastic
characterization and modeling of soft-tissues and hydrogels for
bioimaging applications. Dr. Kalyanam was a Post-doctoral Researcher
at the Computational Fracture Mechanics Group at the University of
Illinois from 2005 to 2006 and conducted research in the area of
delamination fracture in advanced Al-Li alloys.
He was a Research Assistant in the McDonnell Douglas Composite
Materials Lab. from 1998 to 2004, where he worked on the testing,
analysis and characterization of the mechanical behavior of
materials - metallic alloys, piezoceramics, single crystals and
composites.
Major Publications
Dr. Kalyanam has 20 technical publications and reports in the areas
of fracture and failure of materials, development of finite element
modeling methodologies, FEA for prediction of the effects of
material nonlinearity and environment, and development of
experimental protocols combined with numerical methodologies for
characterizing the mechanics of material behavior.
He is a reviewer for several international journals, which include
Engineering Fracture Mechanics, Smart Materials and Structures,
Indian Journal of Engineering and Material Sciences.
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