Arnab Ghosh Email & Phone Number

Menlo Park, Ca, Us

United States

Lead Materials and Process team at Mainspring:Thermal Spray - HVAF, APSCorrosion - Testing and MitigationTribology/Oxidation of Carbon graphiteProcess Development - sacrificial and barrier coatingsProbabilistic Material Design CurvesHeat treatments - Ni alloys, Stainless steelsMicrostructure property relationshipsHydrogen Embrittlement

Menlo Park, California

High temperature tribology - graphite, superalloys, HVOF/HVAF and APS coatingsMaterial selection and testing - Metals (steels, stainless steels, superalloys), Carbon-GraphiteCorrosion - Testing and correlation with field life, mitigation techniquesProcess Development - Thermal Spray, Coatings, platings

West Lafayette, Indiana

- Develop hybrid model framework (physics-based models with machine learning and data driven models) to predict Remaining Useful Life (RUL) of wind turbine drivetrain components- Lead research and development of physics-based surface-initiated failure models such as wear for wind turbine, rail and aerospace applications- Technical lead of the first implementation of Wind Turbine main bearings in Sentient’s Prognostics Health Management framework, identifying high risk components and remaining useful life. - Developed temperature based progressive damage models and diagnostics models using SCADA data- Developed classification models based on operating conditions (SCADA) to predict gearbox and main bearing failures in wind turbines- Prepared and communicated technical reports to wind turbine operators – Root Cause Analysis, Reliability comparison of bearing suppliers, likely failure modes and possible actions to extend component life.

Lafayette, Indiana Area

- Created physics based computational models to predict surface-initiated failures due to friction and wear in lubricated contacts (gears, bearings)- Investigated effect of surface topography (roughness, skewness, kurtosis, ACR), adhesion, microhardness and elastic plastic contacts to push phenomenological models closer to field effects. - Conducted extensive evaluation of field failure and model outputs using reliability tools (Weibull) and statistical analyses (DOE, ANOVA, Pareto) to identify critical parameters, interactions etc.

West Lafayette, In

- Conducted extensive fretting wear and fatigue experiments on heat and wear resistant coatings (NiCr-CrC, CrCo) and Ni based superalloys used in gas turbines: generated wear maps and investigated wear scars in SEM & optical profiler- Simulated fretting wear using non-linear contact model in FEA (ABAQUS) for a Hertzian contact: implemented a novel stress based wear law derived using principles of Damage Mechanics, validated with literature data- Created and validated a sub-surface crack propagation model using Linear Elastic Fracture Mechanics to predict fretting failure- Implemented an Elastic Linear Kinematic Plastic (ELKP) material model in FEA (ABAQUS) to investigate the effect of wear debris on a Hertzian Contact- Developed a novel elastic-plastic semi-analytical model to study effect of surface roughness parameters on wear rate.- Developed an apparatus to visualize nano/micro scale surface phenomenon such as adhesion with nano-indentors under a surface profilometer. Proposed a theoretical explanation of the observed stick-slip phenomenon.

Orlando, Florida Area

- Conducted Thermo Mechanical Fatigue simulations on notched specimens to predict crack initiation using Garofalo creep and temperature dependent multilinear isotropic hardening plastic material models- Validated the results with data obtained from laboratory experiments- Evaluated the effects of notch radius, temperature range, applied load and phase on thermo mechanical fatigue life. Analysed the simulations statistically and obtained coefficients to extend the model to predict component level failure

Pune Area, India

Material Testing and Selection:- Characterized materials (AISI 1045, 4140, 6150, 1070, ADI) and surface engineering techniques (Case hardening, nitriding, cryogenization, carburizing, hard chrome, TiAl coating) for fatigue and wear resistance and provided material expertise to designers- Initiated abrasive wear research by developing ASTM G65 based test stand and evaluated wear rates of steel and aluminum alloys- Designed and developed a customized test stand to simulate actual harvester operating conditions and conducted experiments on selected designs and materials to measure sliding wearProduct Design and Analysis:- Product Life Cycle – Involved in concept design till prototyping for two functional modules of model year 2017 agricultural machinery. Part of FGR, mule build team- Designed sheet metal components, optimized weight to strength ratio, designed and analyzed Al extrusions (6061 & 6063), RCA of warranty components, FMEA of new and redesigned Al components

B.E. (Hons.) MechanicalInterests: CAD, Rapid protoyping, Mechanical Design, Renewable EnergyI have worked on slicing algorithms to generate contours at various levels in a NURBS B-rep solid to serve as an input to Rapid Prototyping. I used MATLAB to generate an axis-symmetric solid and sliced it using direct and indirect methods.

I worked on Ballast water Management Systems which involved analying the footprint of various vessels I worked on Ballast water Management Systems which involved analyzing the footprint of various vessels to install the Treatment systems. Finally i ended up designing a Distribution Layout for the Ballast Water into the vessels which was appreciated as a novel idea.

Phd, Mechanical Engineering

Activities and Societies: President, Indian Graduate Students at Purdue (IGraSP) - 2013-2014President, Indian Graduate Students at Purdue.

Bachelor Of Engineering (Hons), Mechanical Engineering

Activities and Societies: Student Coordinator - Placement Unit - January to May 2008, Secretary - Poetry Club - August 2006 to May 2007.