Research Interests

• Machine design
• Machining and other manufacturing processes
• CAD/CAM
• Energy engineering

• U.M.N. Jayawickrema, A.S. Kumar, H.M.C.M. Herath, N.K. Hettiarachchi, H.P. Sooriyaarachchi, J.A. Epaarachchi, Surface mounted distributed fiber optic sensor measurement and concrete damage plasticity modelling for damage analysis of reinforced concrete beams, Proceedings of the SMASIS 2021 conference on Smart Materials, Adaptive Structures and Intelligent Systems, September 14-15, 2021, SMASIS2021-67524
• D. Abeyrathna, T. Ariyawansha, PLAG Alwis, N.K. Hettiarachchi Design, Development and Testing of a Direct Driven Two-wheel Tractor Operated Two-row Metering Mechanism for Sugarcane Fertilizer Applications, Rajarata University Journal, Vol 6, Issue -1, 2021
• M.N Jayawickrema, J.A. Epaarachchi, N.K. Hettiarachchi, H.M.C.M Herath, Monitoring Structural Performances of Concrete Beams Using Fibre Bragg Grating (FBG) Sensors,10th International Conference on Structural Engineering and Construction Management At: Kandy, Sri Lanka, Volume 02, 2019
• Ayad Kakei, J.A. Epaarachchi, Mainul Islam a, J. Leng, Anura P. Rathnayakee, N.K. Hettiarachchi, Evaluation of thermo-elastic stress analysis (TSA) and digital image correlation (DIC) techniques for detection of delamination crack propagation of glass epoxy composite plate under uni-axial cyclic loading, 21st International Conference on Composite Materials Xi’an, 20-25th August 2017
• E.A.D. Kumara, N.K. Hettiarachchi, K.G.R.M.Jayathilaka Overview of the Vertical Axis Wind Turbines Department of Engineering Technology, International Journal of Scientific Research and Innovative Technology ISSN: 2313-3759 Vol. 4 No. 8; 2017
• Rohan E.P., De Silva K.G.V.K. and Hettiarachchi N.K. Design of a domestic type machine for de-polymerizing solid waste of polyolefin to a usable hydrocarbon fuel, Proceedings of 10th Academic Sessions – University of Ruhuna, March 2013
• Vinojan M., Shashika K.A.N., Madhusoothan S., De Silva K.G.V.K. and Hettiarachchi N.K., Investigation of CI Engine Performance when supplemented by raw biogas or LPG, Proceedings of 10th Academic Sessions – University of Ruhuna, March 2013
• Lunuwattha A.M.A., Norbert M.J., Rathnayaka R.M.S.P.C., Samaranayaka T. and Hettiarachchi N.K. Development of a Waterwheel Turbine to be installed at Drop Structures of irrigation canals for water pumping and electricity generation, Proceedings of 10th Academic Sessions – University of Ruhuna, March 2013
• Dharshana K.A.D., Hettiarachchi N.K., De Silva A. and Gayashan M., Manual Power Generation for mechanical applications, Proceedings of 10th Academic Sessions – University of Ruhuna, February 2012
• Sahitharan P., Rasanga W.A.K., Rathnayaka J.M.C.D., Bandara A.M.S. and Hettiarachchi N.K., Experimental study on a pendular type device supported by a float to extract sea wave energy, Proceedings of 10th Academic Sessions – University of Ruhuna, February 2012
• Lekamge, D.A., Marasinghe M.M.J.M.B., Dayarathna, P.W.H.T.B., Dharshana, L.K. and Hettiarachchi, N.K., Development of a domestic waterpump to use as a turbine for pico hydro (PAT), Procedings of 8th Academic Sessions – University of Ruhuna, February 2011
• Sanath J.A. and Sumith Baduge and N.K. Hettiarachchi, Numerical and Experimental study of a vertical axis wind turbine by introducing new turbine blade profile and deflector-rudder unit. Procedings of Annual session of IESL 2011
• Sanath J.A., Sumith Baduge and N.K. Hettarachchi, Performance Improvement of Vertical Axis Wind Turbine: Introduction of New Blade Profile with Deflector-Rudder Unit. Vidulka National Energy Symposium, August 2010
• Nandita Hettiarachchi and Chithral Ambawatte, Biofuel Usage in IC Engines and other applications. Proceedings of SARC regional Training Workshop on Bio Fuels, Sri Lanka, November 2008
• N. K. Hettiarachchi, T. Moriwaki et al., Circular Vibration Planing of Inconel 718 – An Analysis of Surface Finish and Tool Wear, Journal of advanced machine design, systems and manufacture, Vol 2, No 1, 2008
• N. K. Hettiarachchi, T. Moriwaki et al., Finish machining of Inconel 718 by circular vibration planing- an alternative for ball end milling Fourth international conference on leading edge manufacturing in 21st century (LEM 21), Fukuoka – Japan, November 2007
• N. K. Hettiarachchi, T. Moriwaki et al., Development of a circular vibration milling attachment and its application to machining of hardened steel. International Journal of Manufacturing Research (IJMR) Volume1 Issue 3 – 2006
• N. K. Hettiarachchi, T. Moriwaki et al., Surface finish improvement of Inconel 718 by circular vibration ball end milling. Proceedings of The 8th International conference on precision manufacturing technology (8th ICPMT), Matsue – Japan. November2006 (Won the best paper award)
• N. K. Hettiarachchi, T. Moriwaki et al., Development of a circular vibration milling attachment. Proceedings of the third international conference on leading edge manufacturing in 21st century (LEM 21), Nagoya – Japan. Oct 2005

• Senior lecturer, Faculty of Engineering, Ruhuna University(02.05.2008-Present )
• Project Engineer and Project Site Manager, Ceylon Petroleum Corporation: Construction of a modern aviation refueling terminal and a fuel hydrant system in Colombo International Airport.(1998-2002)
• Mechanical Design Engineer, Cambridge Gemonics Pvt Ltd, Sri Lanka; A dedicated R and D company to design and develop a multi-spindle robotic gem cutting machine, of which the technology and design are based on CAD-CAM.(1996-1998)