MURUGAN G
@annamalaiuniversity.ac.in
Professor, Department of Mechanical Engineering, Faculty of Engineering & Technology
Annamalai university
RESEARCH INTERESTS
Fatigue Investigation and Thermal Science
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
K. Arunprasath, G. Murugan, P. Selvakumar, S. Thirumavalavan, S. Mareeswaran, and V. Ramkumar
Elsevier BV
M. Premnath and G. Murugan
Association of Computer, Communication and Education for National Triumph Social and Welfare Society (ACCENTS)
The applicability of ceramic foam filter as a honeycomb structure substitute to achieve a reduction in the amount of engine exhaust emitted from a diesel engine at various brake powers is tested and studied experimentally. Initially, ceramic foam filters were wash-coated in-house using metal oxides such as Aluminum Oxide (Al2O3), Copper Oxide (CuO), and Titanium Oxide (TiO2). The wash-coated ceramic foams were installed inside the outer casing of the Catalytic Converter (CC), which was fabricated in-house according to the dimensions of the CC manufactured by the Original Equipment Manufacturer (OEM). The CC manufactured by OEM consists of honeycomb monolith wash-coated with Platinum (Pt), Palladium (Pd), and Rhodium (Rh) as catalyst materials. The initial performance and emission tests were conducted using the manufactured CC. Following this, the experiments were conducted using ceramic foam-modified CC. The experimental results show that the brake thermal efficiency exhibited by the ceramic foam filter was less than that recorded for the honeycomb monolith substrate. At full load, the Brake Thermal Efficiency (BTE) of the OEM manufactured CC, ceramic foam filter-wash coated with Al2O3, CuO, and TiO2, were 33.14%, 31.6%, 30.2%, and 29.2%, respectively. Reduced emission output parameters, such as Hydrocarbon (HC), Carbon Monoxide (CO), and Oxides of Nitrogen (NOx) emissions, were recorded for the metal oxide-coated ceramic foam filter. The CO and HC conversion efficiencies observed for the ceramic foam filter were significantly higher than the efficiencies of the CC manufactured by OEM. The NOx conversion efficiency was marginally higher than that recorded for the manufactured CC.
S. Saravanan, K. Raghukandan and G. Murugan
Materials Research Forum LLC
K. Hokamoto, G. Murugan, S. Saravanan, K. Raghukandan and S. Tanaka
Materials Research Forum LLC
This study addresses the development of biaxial and triaxial weldability windowan analytical estimation-for determining the nature of interface in aluminum 5052-stainless steel 304 dissimilar explosive cladding. The lower and upper boundaries of the biaxial weldability window are formulated using empirical relations proposed by earlier researchers. The process parameters dynamic bend angle and collision velocity are chosen as ordinates and abscissa respectively. In addition, a triaxial weldability window, comprising of three process parameters viz., flyer plate velocity, collision velocity and dynamic bend angle is also developed. Explosive cladding experiments were conducted by varying the process parameters and the interface microstructure is correlated with the developed weldability windows.
Ashutosh Bagchi, S. Saravanan, G. Shanthos Kumar, G. Murugan, and K. Raghukandan
Elsevier BV
Abstract The effect of process parameters viz., welding speed, pulse energy and frequency on the aspect ratio and the peak temperature in the numerical simulation of Nd: YAG laser welding of Hastelloy C-276 is presented. The experimental conditions are designed based on Taguchi L9 orthogonal array and the simulation is performed in SYSWELD 16, a 3 D software package. The optimized parameters for attaining a maximum aspect ratio and a minimum peak temperature (responses) were determined by computing the Signal-to-Noise Ratio (SNR). Mathematical model based on regression analysis was developed for predicting the responses using statistical software Minitab-16. Further, the simulation results are correlated with the regression and artificial neural network models. The deviation is estimated to be less than 10% indicating their effectiveness in predicting the responses. The experimental macrograph for the optimized condition is concurrent with the numerical simulation.
C. Mohanraj, R. Dineshkumar, and G. Murugan
Elsevier BV
G. Murugan, K. Raghukandan, U.T.S. Pillai, and B.C. Pai
Elsevier BV
Abstract Material defects formed while manufacturing, fabricating and material handling are crucial in deciding the fatigue life of machine member. Research reports the modelings of effect of a defect upon the high cycle fatigue (HCF) behavior of materials are sparse. This paper attempts to model the effect of a defect over the HCF life of cast magnesium AZ91alloy by introducing defects of two different volumes, at three different locations (top, middle and bottom of the specimen in critical zone) in AZ91 specimen, which is subjected to transverse load. Transverse load HCF test results obtained using ASTM standard D671 specimens machined from low pressure cast and gravity cast magnesium AZ91 were used for the modeling. The results reveals that defect in the critically stressed part of the specimen drastically reduce fatigue life of specimen even for an insignificant increment of load.
G. Murugan, K. Raghukandan, U. T. S. Pillai, B. C. Pai, and K. Mahadevan
Springer Science and Business Media LLC
Magnesium is the lightest structural material used and it is important to explore its properties completely as it is used in aviation, automotive, communication etc., This paper reports the reliability analysis carried out on the high cycle fatigue investigations performed on cast AZ91 Magnesium alloys under transverse load. An Electro dynamic shaker system was used to apply transverse load on the specimens fabricated as per ASTM standard. Weibull analysis was under taken to check and compare the reliability of the investigations on gravity cast and low pressure cast AZ91 magnesium alloys.
G. Murugan, K. Raghukandan, U.T.S. Pillai, and B.C. Pai
Elsevier BV
Abstract A new testing procedure, employing transverse load was adopted to investigate the high cycle fatigue behaviour of low pressure cast AZ91 magnesium alloy. The tests were conducted with an electro dynamic shaker system by employing specimens fabricated as per ASTM standard. S – N plot was generated from the test results and compared with that of gravity cast AZ91 alloy tested in identical ambience. The influence of transverse load on the fatigue behaviour of these alloys is discussed. As fatigue cracks were found to have initiated in pores in most of the tested samples, pores were assumed as initial cracks as per linear fracture mechanics and the critical stress intensity amplitude ( K cr ) was estimated. Structure–fatigue property correlations are discussed using fractographs. Mean stress effect on the fatigue properties and effects of alloying constituents are also discussed.
G. Murugan, K. Raghukandan, U.T.S. Pillai, B.C. Pai, and K. Mahadevan
Elsevier BV
High cycle fatigue behavior of magnesium AZ91 alloy under transverse loading ambience is reported. An electro dynamic shaker system was used to apply transverse load on the specimen fabricated according to ASTM standard. The S–N curve for this novel test method for the alloy was generated and compared with the existing fatigue data. This assumes significance in the terrain of commercial applications, where the design of critical components is subjected to repeated transverse loads. Fatigue cracks were initiated at the pores in most of the samples. Considering the pores as the initial cracks, using linear fracture mechanics, critical stress intensity amplitude (Kcr) was estimated. Structure – fatigue property correlation was investigated by metallographic (optical and SEM) examination.
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INDUSTRY EXPERIENCE
Worked as Branch In charge in M/s.Pondicherry Tourism and Transport Development Corporation Ltd., for 11 years