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J.R.K MURTHY
M.Tech IIT/Kanpur
FEM Solutions
No. 160, “Srisairam”,
2nd
“A” Cross,
Domlur 2nd
Stage,
Bangalore- 560071
Email: femsolutions@gmail.com
Phone No:
0-99451 58988
+91 80 2535 4959
PROFESSIONAL OBJECTIVE
Consulting: To provide consultancy services in the areas of static/ linear and non-linear static
analysis/ vibrations /CFD and steady and transient state thermal analysis of structures. Conduct
programs for know-how transfer.
PROFESSIONAL ACTIVITY
2006 Onwards
Providing consultancy in the fields of stress, deformation, vibrations, CFD and
thermal analyses using FEM tools to several engineering industries like Ace
Designers,BFW, Kennametal, Micromatic Grinding, A Innovative International,
Precitec, Bosch, SHAR, L & T, ISGEC and more industries.
2000 till Feb 2006:
Central Manufacturing Technologies Institute (CMTI)
Head / Computer Integrated Manufacturing /Technology Transfer Departments
Was leading a group of 26 highly qualified and skilled personnel in the 3 divisions of (a) FEM;
(b) Advance Technology & (c) CNC
FEM: The group responsible for analysis of structures (ranging from custom machines,
aircraft and other defence related structures), which were designed in-house at CMTI or
designed and sponsored by other manufacturers. More on the activities carried out explained
later in this note.
These structures have been manufactured and tested at CMTI or at user’s works. Follow up
always testifies post analysis performance confirmation. The fields of analysis are as below:-
 Structural linear,
 Geometric and material nonlinear, hyper elastic
 Vibrations including modal, harmonic, transient and random
 CFD, Steady and transient state thermal including temperature and thermal deformations.
Packages used: ANSYS / NISA/ Pro-Mechanica
Advanced Technology: As a head of this group the activities here include CAD using UG
CAM up to 5-axis. Several 3, 4 and 5-axis components like impellers, agitators, manufactured

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for industry using UG and CAMAND packages. RP (direct metal laser sintering) and reverse
engineering services were also provided to many industries like GE, MICO, Godrej, jewellery
and toy industry etc.
CNC Division: The group successfully developed a CNC system and licensed it to a user
industry. Several machine tools were retrofitted with latest CNC control systems. Direct
numerical control (DNC) networking was carried out for many complex machines in BEML
and CMTI.
1980-2000: Head - FEA division
As a head of this division we were instrumental in solving several structural analysis problems of
those of industry in India and abroad & also those of in house of CMTI. Analysed machine tools,
general engineering machinery, aerospace structural components and defence industry structures.
Solved more than 60 problems in the fields of Static deflection, stress, Vibrations including
modal, harmonic and transient vibrations, Steady and transient state thermal analysis Non-linear
analysis for entities within and outside India.
(A brief write up on major project details and some of the research papers published is detailed in
the enclosed Annexure)
1971-2000: Development of FEM code and Consultancy to Industry
Was actively involved in the development of FEM software code for static, vibration and thermal
analyses and for pre and post processing. Used the package for solving industry problems. The
elements developed are:-
 Beam element,
 Linear, quadratic and cubic quad elements
 Linear, quadratic and cubic triangles
 Linear and higher order tetra and hexahehedral elements,
 Spring elements, contact elements,
 Axisymmetric elements etc
 Thermal and vibration analysis
To explain the pre processing side, the software generates a variety of elements like beam, 2D
and 3D elements. Bandwidth minimisation and node re-labelling algorithms had been included. In
the post processing side, plotting the meshes, deformations, stress contours, hidden line removal
facility etc., had been implemented.
The other responsibilities were:
 Testing of machine tools for improving static rigidity and power utilisation
 Computer simulation of gear drives and hydraulic drives in machine tools for vibration
free feeds ,speeds and reversals

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 FEM analysis of machine tool structures for achieving improved stiffness to weight ratio
and power utilisation.
EDUCATIONAL QUALIFICATIONS
M Tech in Mechanical Engineering from IIT - Kanpur
BE in Mechanical Engineering from SV University, Ananthapur
MAJOR PROJECTS EXECUTED USING FEM APPROACH
1. Analysis of antenna support structure.
2. Vibration analysis of an assembly fixture that tightens screws in passenger cars
3. Minimisation of vibrations in high speed spindle systems supported in antifriction
bearings.
4. CFD analysis of valves used in tractors.
5. CFD and stress analyses of Rotary joints used in earth moving equipment.
6. CFD and stress analyses of DC valves used in earth moving equipment.
7. CFD analysis of fluid flow in an axial piston pump.
8. Design analysis test rigs (Cam Box Structure) for fatigue life testing of locomotive fuel
injection pumps operating at 1400bar pressure.
9. Development of a parametric program for investigating into static and vibration response
of machine tool spindles.
10. Development of a parametric program for investigating into ovality errors induced in
cylindrical work pieces (work-holding devices) held in multi jaw chucks in machine
tools.
11. Analysis of leading edge slat actuators and control manifold used in an aircraft. The
hydraulically operated actuators were optimised for minimum weight as per international
suppliers. Subsequent physical prototype testing validated the analysis. Stress,
deformation, buckling and transient vibration analyses carried out.
12. Analysis of a rotary actuator used in aircraft: This is a multi-stage epicyclic compound
gear drive, very compact- just 70 mm in diameter with a large speed reduction and
transferring high torque. Deformation and stress analyses of the highly stressed gears and
the structure, carried out.
13. Analysis of fuel mixing machines (of two different sizes) each with compound, epi-cyclic
gear drives.

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14. Investigation into thermal deformations of a precision machining center. Predicting the
permissible variation in ambient temperature that limits the thermal deformations to
admissible level.
15. Analysis of a high speed horizontal spindle machining centre: Static, dynamic and
thermal analyses carried out for ensuring low inertia of moving parts-the slides, chatter
vibration free machine performance and reduced thermal distortions under operating
conditions. Substantial reduction achieved in machine weight without compromising
machine quality.
16. Analysis of a large CNC gantry machine for improved power utilisation and weight
reduction. This machine is for aerospace applications.
17. Analysis of a vertical spindle machining centre. Spindle power is 12kW. Machine design
is improved to utilize full motor power without the onset of chatter vibrations.
18. Analysis of a horizontal CNC machining centre: Static, vibration and thermal
analyses helped in machine full power utilisation. A novel method developed for
torsional analysis of gear drive systems. The method showed that improved bearing size
and type decreases torsional vibrations. This appears to be in contrast to the commonly
observed phenomenon that torsional vibrations are decided by polar moment of inertia of
shafts.
19. Analysis of a CNC lathe. The machine weight is optimized for optimum power
utilization. The analysis helped in huge annual savings.
20. Analysis of 25KW centre-less grinder. The design improved to achieve full machine
power utilization,
21. Analysis of a large, 25kW crank-shaft journal grinder. Design optimized for achieving
maximum machine stiffness and low weight.
22. Analysis and design optimization of a high power CBN grinder.
23. Analysis of a Vertical Turning Centre. 45kW motor power. Machine rigidity increased
by 30% without much increase in weight. Power utilization of the machine without the
onset of chatter vibrations, increased by 30% to 55kW.
24. Analysis special purpose machines called FLEX. The machine has two spindles each with
12 kW motor power. The design is improved substantially for utilizing full motor power
without the onset of chatter vibrations.
25. Design analysis of several CNC lathes. The analysis effected in savings of about Rs
100Lakhs per year to the manufacturer.
26. Design analysis of two different Laser cutting machines. There is no cutting in the
machine. Yet the machines used to vibrate during slide accelerations/ decelerations. The
structures are modified for minimizing the vibration levels to the admissible levels.

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27. Design analysis of Gasketed flange joints in a petrochemical reactor vessel.
Computation required bolt tension for leak proof operation.
28. Analysis of a large mixing machine: The machine had three large agitators, executing
epicyclic planetary motion. The analysis covered (a) Strength checking the complete
planetary gear drive, where a novel method for assembling four sets of shafts carrying
compound epi-cyclic gears on to a single fixed sun gear (b) Deformation, stress and
harmonic response analysis of the full machine for ensuring trouble-free machine
function.
29. Design optimization of a hydraulically powered Rotary Joint in an earth moving machine
through CFD and stress analyses.
30. Analysis of hydraulic bolt tensioners operating at 1000/1500 bar internal pressure.
Weight minimised through a novel cylinder/ piston design.
31. Design analysis of a Variable Mach number Flexible Nozzle along with its Controlling
Link mechanisms, for achieving continuously varying wind speed up to Mach 4 in wind
tunnels. Stress and deformation analysis carried out for a reputed company.
32. Analysis of several large pressure vessels ( petrochemical reactors) with closely spaced
large nozzles. Stress analysis carried out satisfying ASME codes. Analysis carried out for
an engineering consultancy company. Also investigated are the gasket joints in the bolted
flanges.
33. Analysis and optimisation of bed of a slant bed CNC lathe. Effective shear centre
location and appropriate local ribbing helped in designing a rugged machine with 100%
improvement in machine performance, without any additional weight, as compared to
reputed machine models.
34. Design and analysis of a Diaphragm chuck used in a precision cylindrical grinder. The
work carried out for an SPM manufacturer.
35. Design optimization of the bed of a cylindrical grinder. The analysis helped in
improving the job accuracy during grinding.
36. Investigation into transient vibrations generated during slide acceleration/ deceleration
in a high speed CNC machining centre.
37. Transient thermal analysis for shrink fitting a large 600 mm diameter shaft into the
housing of a large assembly used in a facing and taper boring machine. Temperature
analysis and thermal deformations studied considering the requirement of desired
interference between the shaft and the bore.
38. Analysis of a 500T press: The FEM analysis was carried out to optimize the weight and
the stress balance for this press that was manufactured by the manufacturer. FEA carried

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out helped in reducing the machine weight by 8000 kg, at the same time assuring the
same performance. This resulted in a cost reduction of at least 8 Lakh Rupees per
machine.
39. Thermal analysis and design of mould and plunger for manufacturing 17” TV glass
picture tube shells. Glass mould design is really a complex process because the mould
and plunger which transfer their shape to the formed glass shell, are under heated
condition and thereby changing their geometry when glass shell is formed. Subsequently,
the hot glass shell it self, cools down to room temperature and during the process the
geometry changes. A simplified approach has been adopted for the analysis.
40. Analysis of a rubber boot (a hyper elastic structure), used for protecting automobile
steering gear mechanism. Modeling hyper elastic material models and self-contact is a
specialty here.
41. Analysis of hyper elastic Quad-ring seals in comparison to O-ring seals, used in
hydraulic actuators. Contact analysis is a specialty here.
42. Design analysis of trunk door seals used in a passenger car.
43. Design analysis of hydrostatic thrust pads using FLOTRAN/ ANSYS. Hydrostatic
slide way thrust pads find application in heavily loaded machinery where low friction is
desired in slide ways.
44. Analysis of compact, 300T very high pressure hydraulic stud tensioning equipment.
The analysis helped in arriving at a light weight compact design, there by facilitating
substantial reduction in manufacturing costs.
45. Thermal and vibration analysis of a 300 kW gear box used in wiredrawing machinery.
The analysis helped in design simplification by reducing the number of bearings from 5 in
the gear box to 4. Further, high heat generating spherical bearings replaced by less heat
generating cylindrical roller bearings. The total heat generation in the gearbox decreased
by a third from 6 kW to just 4 kW. This resulted in substantial reduction in the tonnage of
the refrigerated cooling system there by slashing machine operating costs and improving
cost competitiveness.
46. Analysis of strain energy release rate in a laminated composite.
47. Design optimisation of a die holder used in a solid fuel briquetting press: The die
holder is the heart of the briquetting press, the press being used for manufacturing fuel
briquettes from agro waste material like paddy husk, sugar bagasse, saw dust, ground nut
shells etc. In the machine, the die-holder was developing cracks and failing just for 200-
250 hrs of operation. Stress analysis showed that slender sections can give improved

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component performance and longer life. It may be mentioned that designers often tend to
provide larger sections ‘to be safe’. The analysis proved that the truth is the other way.
48. Transient vibrations (deformation and stresses) analysis of a road vehicle under base
induced loads like acceleration loads, braking loads, cornering loads, bumps etc. The
analysis helped in improving the highly stressed members of the vehicle frame for crack
free performance.
49. Software developed for Computer Aided Roll pass design for an export oriented Roll
mill. This was innovative software developed for the first time in the world. The software
developed on AutoCAD platform saved enormous efforts for the Roll-pass designer. The
software slashed design cycle time of roll passes of new sections from 15 days earlier to
just 3 days and relieving the designer from considerable drudgery of empirical and
graphical procedures.
50. Random vibration analysis of a road vehicle: The vibrations were induced due to road
undulations. Stress analysis of the bus frame helped in designing appropriate sections.
51. Analysis of a centrifuge used in sugar plants: The analysis helped in running the
machine at optimum speed, redesigning several fixing screws and improving bearing life
from 13000 hrs to 8 lakh hours for ensuring enhanced up time.
RESEARCH PAPERS PULISHED
Over 22 research papers have been published in several national and international level journals
and conference. A few are listed below:
1. Finite element modeling of floating hinge: Journal of Computer Aided Design,
Butterworth Publication, Glasgow
2. Optimisation of functional properties of machine tool structures Proc. 12th
International
MTDR conf, Birmingham.
3. On FEM modeling of thermal analysis of a high speed spindle system. Proc. Computer
Applications in Production and Engineering, Tokyo, North Holland, 1989.
4. A simple method for torsional analysis of a gear drive. Proc. Conference on Gearing and
Power Transmission, Tokyo, 1988.
5. Analysis of a rubber boot.- A hyper elastic structure. The Machinist, July/Aug 2004
6. Application of direct metal laser sintering (DMLS) RP technology for injection molding
and investment casting. Proc. Conference on Investment Casting, CMERI, Durgapur,
2003.
7. Parallel kinematic machines for the future. Manufacturing Technology Today, Jan 2003.

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8. Slim sections can ensure better machine performance. Manufacturing Technology Today,
Dec 2003.
9. Analysis of flexible mirror: Proc of COPEN, Dec 2003, CMTI, Bangalore.
10. Numerical approach for predicting out-of-plane deflection in laminated composite panel
under compression: Submitted to ICCES, 2005 Chennai.
11. Investigation into resonance characteristics of a machine through frequency Response
analysis. Submitted for publication in ‘The Machinist’, Aug 2005.
12. Dynamics in the drive of a gear hobber. Proc. AIMTDR Conf, 1976, PSG College of
Tech, Coimbatore.
13. Thermal deformations of a surface grinder: Proc. AIMTDR Conf , 1978 IIT/ Bombay
14. Reduction of pressure surges in the hydraulic circuit of a cylindrical grinder: Proc
AIMTDR Conf 1978 IIT / Bombay
15. Analysis of machine tool joints: Proc AIMTDR Conf 1978 IIT / Bombay
SECONDMENTS ABROAD
1. For 7 months during 1980 to University of Manchester (UMIST) for FEA of structures
and for FEM software development.
2. For 12 months to Technical University of Berlin during 1985 for working on FEA and
for development of a software package for sculptured surfaces.
3. 2 weeks visit to Hungary sponsored by UN in 1998 to study applications of CAD/ CAM
in industry
4. 1 week visit to Chemnitz/ Germany to attend a conference on Parallel Kinematic
Machines, during 2002