Srinivasa Rao
[email protected] • mobile +91 8297653731 PROFILE SUMMARY CAE engineer having 6 years of experience on FE Modeling, simulation and analysis of automotive occupant safety systems. Having expertise on various FEA softwares like Hypermesh, HyperView, LsDyna, PamCrash..etc. Dynamic analysis of Airbags & seat belts, 2D and 3D meshing of its various components. Customization of HyperMesh using a scripting language Tcl/tk. ROLES AND RESPONSIBILITIES Understanding customer inputs like model geometry, pdf drawings, reference deck files..etc. Preparing project requirement specifications, estimation & documentation. 2D & 3D meshing of given components as per customer requirements. Input deck file preparation and solving the problem using the FEA solver. Error handling and debugging of FEA solving process. Analysis of the results, report preparation and delivery check list preparation. Project co-ordination, planning, communication with customer and on-time delivery. WORK EXPERIENCE Sr. Analyst, (Dec’ 2015 – present) Satyam-Venture Engineering Services Pvt Ltd., Secunderabad 2D & 3D FE Meshing of Retractor assembly, Airbag housing, Covers, Steering wheel armature..etc. Folding and positioning of Passenger Airbags & Curtain Airbags, Relaxation, and Deployment deck preparation. Volume calculation of new airbag designs & report preparation. Project #1 Volume calculation of Curtain Airbag Scope of this project is to evaluate the new airbag design in terms of it's volume capacity, head positions coverage and thickness measurement. Customer provided the bag geometry and material properties.2D meshing of the bag and BIW is done, and Ls-Dyna deck is prepared by applying a pressure of 0.3 bar and necessary clip fixations. Then the results are plotted in HyperGraph and animations are provided using HyperView. Softwares: Hypermesh, HyperView, HyperGraph, LsDyna971 Project #2 Meshing of Seat belt – Retractor assembly Seat belt-Retractor assembly is a type of Occupant restraint system, which is designed to protect the occupant both actively & passively.2D and 3D meshing of it’s various components like Retractor housing,Spool,Clutch disk,Gear Disk,Lock pawl,Sensor lever,Torsion bar,Sensor Cover,Spring Cover,D-ring,Height Adjuster,Buckle..etc,was done and proper thickness assignment and rigid connections were given and delivered on time Softwares:HyperMesh A Hex dominated mesh is generated for this component with a good quality. Static strength of the bracket is then estimated based on the effective plastic strain occurring at the critical regions of the bracket. A hex dominated mesh is generated for this component and delivered on time.03 Executive Engineer. Edges. materials. Chennai Project #1 Solid meshing of Contact Bridge: Contact bridge is one of the component in the Steering wheel assembly. a FE model of the bracket assembly is created. a force is applied at an angle to the Anchor bracket and appropriate constrains are applied.Project #3 Structural analysis of Anchor bracket • To estimate the static strength of Anchor bracket (seat belt). • softwares: HyperMesh Project #4 Validation of the Steering wheel assembly: .. • softwares: HyperMesh.etc. LsDyna971. Pamcrash2014. • softwares: HyperMesh Project #3 Meshing and stitching of the Passenger airbag: A good quad dominated shell meshing is carried out on the line data provided for the passenger airbag. positioning and relaxation of airbag are done in next step. CAE (Jan’2015 – Nov’2015) L&T Technology services. • softwares: HyperMesh Project #2 Solid meshing of Driver airbag Cover: Driver airbag’s cover meshing is a very critical and tricky at some regions especially at the seam line region and other sharp changing regions. Then deployment deck is prepared using the customer provided inflator data. To represent the belt's pull on the bracket. And the main panel and side panels are stitched properly using appropriate morphing methods. • softwares: HyperMesh. LsDyna971 Project #4 Full CAB deployment model • The complete FEA model of Curtain airbag(CAB) assembly in vehicle environment is developed by meshing of airbag and it’s surrounding parts. connectivity are checked and delivered on time. Folding. A “Body-block impactor test” is designed to study the behaviour of the Driver airbag. • softwares: HyperMesh. Airbag components. Acceleration. displacement curves of the impactor are studied and validated against the physical test data. And a validation report is prepared. • softwares: HyperMesh. Rack bending analysis input file preparation. A FE Mesh is created on the mid-surface and varying thicknesses are assigned to the corresponding elements. velocity. • software: HyperMesh . Structural analysis of Anchor bracket. Various parameters like thickness of different components are tuned to match the physical test data. Acceleration. The Driver airbag is deployed at a particular time. a validation report is prepared. and it comes into contact with the moving impactor in the process. Analyst.. After sufficiently tuning the key parameters.. unable to continue this course and returned to India. displacement curves. velocity..etc. velocity.etc. LsDyna971 Note: From 2011-2014. Results are compared to the test data such as acceleration. “seam leakage”. An Ls-Dyna deck file is ran. I went to Germany to pursue Masters degree in “Computational Mechanical Engineering”. FE model’s results are then compared against actual physical test data and correlated. A Body block impactor is used to study the behaviour the airbag. Sr. Instrument panel. LsDyna971 Project #5 Validation of the Driver airbag: Validation of the Driver airbag involves playing with parameters like “vent hole efficiency”. a validation report is prepared.. • softwares: HyperMesh. Customization macros for automatic Airbag folding.. displacement of the moving impactor indicates the behaviour of the Passenger airbag and it’s capacity to absorb the impact energy. Secunderabad 2D & 3D FE Meshing of Retractor assembly. Unfortunately due to health problems and other issues. So acceleration Vs displacement curves are particularly important in this regard and are closely studied.. Animations are also closely compared. (Jan’ 2008 – Oct’ 2011) Satyam-Venture Engineering Services Pvt Ltd. LsDyna971 Project #6 Validation of the Passenger airbag: Validation of the Passenger airbag is similar to the Driver airbag. Steering wheel. This course mainly contains FEM & CFD subjects. Project #1 Shell meshing of Airbag housing • The Passenger Airbag housing is a complex geometry having many rib structures of varying thickness. FE model and load case are prepared as per the physical test setup. clips & Dynamic analysis of Airbags. But I learned considerable technical knowledge related to Finite Element Analysis(FEA) and the theory behind it.The aim of this project is to validate the FE model of Steering wheel assembly using an impactor test. 3 . fixed Stud.Hex meshing of Spool • Spool is a main component in Retractor (seat belt) assembly.4 Project #6 Macro for Standardization of model setup for Rack-bending analysis • The objective of this macro is to standardize the model setup for Rack-bending analysis.5. • software: HyperMesh Project #3 3D.Tech in Mechanical Engineering from Acharya Nagarjuna University (2007) PROFESSIONAL KNOWLEDGE 1) Hypermesh2017 2) HyperView2017 3) HyperGraph2017 4) Visual-safe9. • softwares: HyperMesh. Tcl/tk 8. which are then validated with the given experimental test results. MPC's creation. this macro is developed using Tcl/tk scripting language. which has to be mounted on a rigid. Analysis is then carried out to study the insertion-extraction Reaction forces on the Clip. • softwares: HyperMesh.1 8) Ls-PrePost-4. Contacts creation. A Hex dominated mesh for the spool component is carried out by using appropriate mesh pattern at critical areas through projecting the cross sections of varying features on to one parallel plane. And then it automatically folds & positions the bag inside the packaging channel.Project #2 3D.5 5) Visual-PAM9.5 6) Visual-DYNA9. • software: HyperMesh Project #4 Analysis on the structural integrity of Clips • A prescribed displacement is applied to the Clip component.Hex meshing of Steering wheel • A Hex dominated mesh is created for the steering wheel component by using inner region shell elements get morphed to match with the outer ring pattern. It's role includes importing FE Mesh file.5 7) Primer13. LsDyna971 Project #5 Airbag folding macro • To automate the folding procedure for Curtain Airbag.5. A GUI window appears at the beginning of the macro to collect folding parameters from the user. • softwares: HyperMesh. Deformation behavior of the Clip component is also studied. Force application at a given input angle and then exporting the final deck file.4 EDUCATIONAL BACKGROUND B. Tcl/tk 8. 10 (Basics) 14) Radioss (Basics) 15) MS-office SOFT SKILLS • Effective communication • Team work cognizance • Presentation skills • Comprehensive problem solving ability • Good knowledge of English PERSONAL PROFILE • Date of Birth : 05/08/1986 • Material Status : Single • Nationality : Indian .03 13) Abaqus6. 9) Tcl/tk 10) HWTK GUI tool kit 11) LsDyna971 12) Pamcrash2014.