Sairam Peddi Resume Feb10

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Sairam Narayana Peddi

Experience Summary
Ø More than 10 years of experience in structural and crash analysis of
automobiles with a strong theoretical background of FEA concepts.
Managed the team of crash & safety engineers to help in the product
development of a new vehicle program to meet the crash requirements of
frontal, side, rear & pedestrian impacts for both structure and occupants.
Ø Spearheaded many technology intensive projects like vehicle
compatibility, vehicle architecture development programs. Experienced in
workload and resource management
Ø Hands on experience in full vehicle frontal, rear, side, car to truck crash
analyses with dummies and low speed bumper impact analyses for
FMVSS, ECER, CMVSS, US NCAP and IIHS, regulations using LS-
DYNA 3D. Experienced in the post processing of results for Dummy
injury parameters, Effective crush calculations, Intrusion measurements
for IIHS FODB, HOF measurements for compatibility studies using
Hypergraph and LS-POST. Experienced in occupant simulations, with
DYNA-MADYMO coupling.
Ø Experienced in correlation of full vehicle dyna models with test results.
Well versed in debugging huge DYNA decks in case of Negative Volume
problems, node shoot out, contact penetrations, hourglass, energy
abnormalities, simulation quality checks etc.
Ø Worked on the seating projects of frontal, Rear crash with 95%, 50%, 5%
dummies and luggage retention on different seating systems using LS-
DYNA 3D.
Ø Got experience in linear and nonlinear analysis of automotive interiors
using CAE software’s like HYPERMESH, MEDINA, LS-DYNA
MSC/NASTRAN and ABAQUS
Ø 2 years of experience at IIT Delhi on FE vibration analysis and testing
(Modal testing). Developed codes in MATLAB and C for FE modal
analysis and Model updating. Got good theoretical knowledge in
Theoretical and Experimental modal analysis, Finite element model
updating and structural modification.
Ø Good experience in frequency response, transient response, acoustic
vibration analyses using NASTRAN and ABAQUS.

Ø Presently Working as a Manager-Crash & Safety in Mahindra &
Mahindra, Mumbai (Jan 2009 to till date)—
Roles and Responsibilities—Leading a team of engineers in M&M in the crash & safety
domain, Guiding the team in program based design development.

Ø Previously worked as a Senior Lead Engineer in General Motors
Technical Centre-Bangalore(Nov 2003 to Dec. 2008)

CURRICULAM VITAE OF P.Sai Rama Narayana page - 1/5


Roles and Responsibilities- Lead advanced crash technology (ATW) projects, Program
based Architecture development work from GM SAAB (Sweeden), GM Holden
(Australia), GMNA

Ø Worked as CAE-Engineer in TATA JHONSON CONTROLS, Sohrab
hall, Behind Pune railway station, PUNE. (July 2002 to Oct 2003)
Ø Worked as a CAE-Engineer in Quantech global solutions , Hyderabad
(May 2000 to June 2002)

Onsite Exposure:

Ø Worked in OPEL International Technology Development Centre (ITDC),
Russelsheim, Germany for 6 months in carsh& safety group. Got good
exposure to product development environment and the advanced crash &
safety methods, procedures in OPEL.
Ø Visited GM Daewoo Auto Technology Centre (GMDAT) in Korea and
given presentations on low speed bumper impact analysis project.

Paper’s Published
Ø A paper titled “Finite element Model Upadting of an F Structure Using
experimental data” has been accepted and published in the proceedings of
2000 SEM IX International Congress on Experimental Mechanics held on
June 5-8, 2000 at Orlando, Florida, US
Ø Published two technical papers titled “Crash Compatibility : A Study on
Defomable Barrier and Secondery Energy Absorbing Structure”, “Crash
Compatibility : Influence of SEAS in Vehicle to Vehicle Collisions” in 2005 GM
CAE confernce held at NA.

Ø A paper titled “Development of a mobile deformable barrier as a car surrogate”
has been accepted and published in 2007 SAE world congress.

Education M.S (Research) in Design of Mechanical
Equipment from IIT, Delhi. 2000, with high
distinction (cgpa-9.224).

B.Tech in Mechanical Engineering from Sri
Krishnadevaraya University, Anantapur, 1998 with
high distinction (79%)

College First at Intermediate (85%) level

School Fist at SSC (84%)



Projects handled

Title
Correlation of Frontal Occupant analysis for Scorpio
Software : HYPERMESH, LS-DYNA971 r4.2, HYPERGRAPH, LSPOST
Operating system : HPUX
Company : IDAM, M&M
Client : IDAM, M&M
Description
The Main objective of this project is to develop and correlate the occupant injuries with the tests conducted
as per FMVSS 208 regulation. FTSS HIII dummies were used in the simulation to predict the injuries. Both
belted and un belted configurations were simulated and correlated with the test results. Steering column
collapse was modeled to reduce the driver head & chest injuries. The simulation results show 80%
correlation with test results. Knee bolster design improvement was done to reduce the femur forces.
Madymo coupling analysis has been done and compared the results with the FTSS dummies.

Title
Clean sheet Delta -2 Architecture development
Software : HYPERMESH, LS-DYNA,HYPERGRAPH, LSPOST
Company : GM Tech center, Bangalore
Client : Crash& safety group, GM SAAB, Sweeden

Description
The Main goal of this project is to Develop a clean sheet architecture that will support General Motors
global small car vehicle bandwidth The main goal is subdivided into several other objectives - optimize
structural efficiency for a minimum mass multi-material solution, develops optimal load paths, expanding
the architectural bandwidth (i.e., the range of vehicle configurations using the same load path
configuration). The configurations considered are sedan, coupe and monocab at a minimum with the
potential
inclusion of a convertible. Design will include optimal gage, section size and material choice of the
vehicles. Architecture will have to meet 5 Star safety ratings, NA and Euro
Safety requirements in Frontal side and rear crashes.

Title :
Development of Mobile Deformable Barrier (MDB) as a car surrogate
Client : Crash& safety group, GM, North America

Description
Objective of this project is to develop the concept of Mobile Deformable Barrier which acts as a car
surrogate in car to truck compatibility studies. A midsize passenger car which represents the average car
fleet in US is considered for this study and finite element simulations were carried out with car-to-LTV
impacts. An MDB concept is then developed to represent the front end of the car by using honeycomb
blocks with various crush strengths, and compared its effectiveness with real car simulations. MDB is fine
tuned so that its response matches with the car response.

Research paper on the above work has been published in SAE conference April 2007



Title : Compatibility studies of GMT305 in Frontal crashes

Description
Objective of this project is to evaluate the various structural parameters like HOF (Height of Force), AHOF
(Average Height of force) and CV (Coefficient of variation) for impact of GMT305 LTV on Full width
deformable barrier and to correlate the simulation with the test results.

A full width rigid and deformable barrier (developed by TRL, UK) crash simulations have been carried out
to understand the crush behavior of the vehicle and to calculate HOF and CV which play important role in
improving the structural interaction. Changes are incorporated in the Full Width Deformable Barrier
received from TRL to control the intrusions between the first and second layers of the deformable barrier.
A Secondary Energy Absorbing Structure is added to the lower part of the vehicle front rails of LTV to
have the good structural interaction with the struck vehicle (car) and studied the effect of it.

Title : Car to truck impact of GMT305 LTV and MALUBU car.

Description
Objective of this project is to evaluate the structural and occupant performance of the struck vehicle-
MALIBU car, by impacting with GMT305 LTV at Full width and 50% Offset conditions. Project evaluates
front to front geometric crash compatibility criteria required for LTV in NA by 2007.
Studied and compared the performance of the struck vehicle- MALIBU by impact with GMT305 LTV at
Full width and Offset conditions. Dummy injury parameters are calculated and compared.

Submitted two technical papers on the above work which were accepted in 2005
International GM CAE conference held at NA.

Title : High Fuel Economy Suburban Project

Description
Objective of this project is to do an optimization study for crashworthiness of CHEVY SUBURBAN which
will lead the way for generating new design concepts for models 2010 and beyond .
Studied the crashworthiness performance of baseline Suburban model and evaluated the crashworthiness of
new design concepts developed through DOE and Optimization studies. Load cases include Frontal NCAP,
ODB, IIHS Side Impact, Roof Crush and Rear ODB.

Title : Front and Rear Bumper low speed impact analysis
Client : Crash& safety group, GMDAT Korea.



Description
The objective of this project is to carry out low speed bumper impact simulations for
CMVSS215, KSR93 and ECER42 regulations. Various design modifications are tried to improve the
performance of the bumper and a comparative case study is performed in a process of finding out the
optimum design for various impact conditions.

Title :
BMW 40/60 Rear Seat Modeling; Seat Belt Anchorage and ISOFIX Analysis as per
ECER 14&CMVSS210 regulations.
Software : HYPERMESH, LS-DYNA, LSPOST,MEDINA
Operating system : UNIX
Company : TATA Jhonson Controls ltd
Client : Johnson Controls , Burschied, GERMANY
Description
Objective of this analysis is to test the BMW 40/60Rear seat for Seat Belt Anchorage and ISOFIX as per
ECER14 . The modeling is done in HYPERMESH and MEDINA as per the requirements of BMW. The
complete seat is assembled with 1d connections as per the JCI burchied best practices. Normal mode
analysis is done in ABAQUS to check the connectivity of the structure and to determine the rigidbody
modes.
Body block and Lap blocks are placed on the 40/60 seat with seat belts connected to the SBA brackets.
Contacts are defined between the seatbelts and the blocks and also for the metal parts. Sliprings are
connected to the seatbelts at particular locations. Loads are given to the blocks and to the back panel as per
the ECER14 regulation (13.5KN+20% safety, 20Mg+20% safety for SBA analsysis; 6.4KN+20% safety at
each belt for ISOFIX analysis as per CMVSS210 regulation)
The analysis is carried out in LSDYNA 960d for 200ms
The results are analysed in LS-POST against the failure criteria and recommendations are suggested.

Title:
NISSAN 4way & 2way Driver Seat Modeling & Analysis for frontal crash, rear crash with 95%
dummy and luggage retention analysis as per ECER17.
Software : HYPERMESH, MEDINA, LS-DYNA, LSPOST
Company : TATA Jhonson Controls ltd
Client : Johnson Controls , Burschied, GERMANY

Description
Objective of this analysis is to test the NISSAN 4way and 2way seats for frontal crash and rear crash and
luggage retention analysis. The modeling is done in HYPERMESH and MEDINA as per the requirements
of NISSAN with minimum characterestic length is equal to 4.5mm. The complete seat is assembled with 1d
connections as per the JCI burchied practices. Normal mode analysis is done in ABAQUS to check the
connectivity of the structure and to determine the rigidbody modes.
95% dummy is placed on the seat with Hpoint of the seat matching with the dummy. Contacts are defined
in LSDYNA for the system and forward and rearward crash pulses are given to the floor of the seat. For
95% dummy track positions are adjusted to the rearmost down position. The analysis is carried out in
LSDYNA 960 d for 150ms.
The results are analysed against the failure criteria in LSPOST and different recommendations are made.

Title :
FMVSS207/210 & 225 Seat Modeling & Analysis for Johnson Controls inc, USA
Software : HYPERMESH, LS-DYNA,LSPOST
Company : Quantum Consultants Inc
Client : Johnson Controls inc, USA


Description
Objective of this analysis is to test the 60/40% bench seat for FMVSS207/210 & 225 loads using LS-
DYNA. FMVSS 207/210 standard establishes requirements for seats and seat beltassembly to insure their
proper location for effective occupant restraint and to reduce the likelihood of their failure by forces acting
on them by the result of vehicle impact. FMVSS 225 standard establishes requirement for child restraint
anchorage systems to ensure their proper location and strength for the effective securing of child restraints.
These standards applies to passenger cars, multipurpose passenger vehicles, trucks, and buses.

Research Project:
Title :
Finite Element Model Updating for Dynamic Mechanical structutres
Software : C, C++, I-DEAS, ICATS, MATLAB
Network OS : Windows NT 4.0
Institute : IIT Delhi

Description:
This project involves finding out the optimum system parameters required in machine tools to
improve dynamic characteristics. It deals with the finite element analysis of machine structure
using developed codes in C, C++ & MATLAB. Experimentation is carried out on the structure
and obtained FRF’s are analysed using Experimental modal analysis techniques. Finite element
model of the structure is updated on the strength of experimental results by using updating
techniques (Direct and Iterative). A software is developed to compare both theoretical and
experimental results and to update the theoretical model of the structure. Two mass modifications
on the structure have been tried by conducting experimentation, and the obtained experimental
results are compared with both FE and Updated models. Finally it has been concluded that
updated model results are closely matching with the experimental results after modification.

Relevant Courses Done:
• Finite Element method
• Computer Graphics.
• Computer Aided Machine Design.
• Advanced Mechanical Design.
• Mechanical Vibrations.
• Mechanisms
• Automobile engineering
• Experimental Modal Analysis

References
1. Dr. BC Nakra
Professor,
Department of Mechanical Engineering,
IIT Delhi, Hauz Khas.
Email: bcnakra@mech.iitd.ernet.in



2. Dr. T. K. Kundra
Professor
Department of Mechanical Engineering
IIT Delhi, Hauz Khas
E-mail: tkkundra@mech.iitd.ernet.in

Personal Details

Father'sName : P.Janardhana Rao
Permanent Address : H.NO: 25-40/9/1
East Ananad Bagh
Malkajigiri
Hyderabad-500047
A.P, India.
Telephone Number 040-27246271 (Mobile No: 09819115526)
Email peddisai@rediffmail.com
Sex : Male
Marital Status : Married
Nationality : Indian
Date of Birth : 18- 12-1976
Languages Known : English, Hindi and Telugu

Extra Curricular Interests
• Got prizes in essay writing, creative writing, singing, musical quizzes etc.
• Painting, Drawing, Playing Chess, caroms, Puzzle solving.etc

Achievements
Ø Received the certificates of recognition and appreciation from GMTCI for the work
carried out in the area of advanced vehicle design programs like compatibility and
High fuel economy suburban projects.

Ø Captured the important lessons learned and best practices for running &
debugging the DYNA jobs, post processing the results with Hyper-graph.

Ø Given presentations on frontal crash and vehicle compatibility to the team.

Ø Successfully completed the GMDAT low speed bumper impact project, interacted
with GMDAT engineers at GM DAWEOO plant Korea and captured the best
practices for bumper analysis.

Ø Prepared the documents for carrying out Bumper analyis for FMVSS, ECER,
CMVSS regulations

Ø Facilitated for training activities to share the knowledge across the team


Sairam Peddi Resume Feb10

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