Sairam Peddi Resume Feb10

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

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)

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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 Operating system : HPUX 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 Software : HYPERMESH, LS-DYNA,HYPERGRAPH, LSPOST Operating system : HPUX Company : GM Tech center, Bangalore 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 Software : HYPERMESH, LS-DYNA,HYPERGRAPH, LSPOST Operating system : HPUX Company : GM Tech center, Bangalore Client : Crash& safety group, GM, North America 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. Software : HYPERMESH, LS-DYNA,HYPERGRAPH, LSPOST Operating system : HPUX Company : GM Tech center, Bangalore Client : Crash& safety group, GM, North America 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 Software : HYPERMESH, LS-DYNA,HYPERGRAPH, LSPOST Operating system : HPUX Company : GM Tech center, Bangalore Client : Crash& safety group, GM, North America 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 Software : HYPERMESH, LS-DYNA,HYPERGRAPH, LSPOST Operating system : HPUX Company : GM Tech center, Bangalore 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 Operating system : UNIX 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 Operating system : UNIX 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: [email protected]



2. Dr. T. K. Kundra Professor Department of Mechanical Engineering IIT Delhi, Hauz Khas E-mail: [email protected] 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 [email protected] 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
