SELVAM R
@stjosephs.ac.in
Associate Professor
St. Joseph's College of engineering
RESEARCH, TEACHING, or OTHER INTERESTS
Mechanical Engineering, Mechanics of Materials, General Engineering, Automotive Engineering
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
G Ashwin Prabhu, R Selvam, and K M Kumar
Springer Science and Business Media LLC
R. Selvam, M. Subramanian, M. Diviya, T. M. Yunus Khan, Rahmath Ulla Baig, Tansir Ahamad, Md. Abul Kalam, Abdul Razak, N. Monish, and Anteneh Wogasso Wodajo
Springer Science and Business Media LLC
AbstractThe traditional way to machine hybrid composites is hard because they tend to break, have a high retraction, have a high service temperature, and have an uneven surface irregularity. For high-strength fiber/metal composite constructions, alternative machining methods have drawn interest as a solution to these problems. Current research focuses on enhancing the Abrasive Water Jet Machining process by optimizing its variables using a composite material of epoxy reinforced with silicon carbide, stainless steel wire mesh, and Kevlar. The variables assessed are the Nozzle-to-substrate gap (S), the Abrasive discharge molding and different percentages of silicon carbide (SiC) filler (0%, 3%, and 6% by weight), three different types of hybrid laminates (H1, H2, and H3) were produced. The response surface method (RSM) was utilized in this learning, specifically on a central composite design, to calculate and optimize machining variables based on the Kerf convergence ratio (Kt) and Surface irregularity (Ra) as responses. According to the results, the traverse feed velocity, Abrasive discharge proportion, and Nozzle-to-substrate gap are the critical factors in determining Surface irregularity and Kerf convergence width (H1 laminate) for a fiber/metal laminate with 0%, 3% and 6% weight fraction. In the case of a 3% weight fraction H2 laminate, the traverse feed velocity was identified as the primary factor affecting the Kerf convergence ratio. In contrast, traverse feed velocity and Nozzle-to-substrate gap had the most significant influence on Surface irregularity. The findings also indicated that S, followed by Abrasive discharge proportion and traverse feed velocity, are the variables that have the most significant influence when cutting 6 wt% SiC filler particle fiber/metal laminate (H3 laminate). For Surface irregularity, the combination of traverse feed velocity and Nozzle-to-substrate gap had the most significant impact. To validate the optimization results, confirmatory tests was conducted, and the findings were very similar to the experimental values, indicating the accuracy and effectiveness of the optimization process. To better understand the manufacturing processes, a scanning electron microscope was used to examine the morphological features of the machined surfaces, such as delamination, fibre breakage, and fibre pull-out.
Prabu Ravindran, Kumarappan Mani Kumar, Selvam Rangasamy, and Kuttynadar Rajammal Vijaya Kumar
Springer Science and Business Media LLC
S. Murugapoopathi, G. Ashwin Prabhu, G. Chandrasekar, R. Selvam, T. Gavaskar, and S. Sudhagar
Springer Science and Business Media LLC
M. Subramanian, R. Selvam, N. Monish, and Babu. Vinoth
Informa UK Limited
R. Selvam, M. Vignesh, R. Pugazhenthi, G. Anbuchezhiyan, and M. Satyanarayana Gupta
Springer Science and Business Media LLC
Prabu Ravindran, Kumarappan Mani Kumar, Selvam Rangasamy, and Kuttynadar Rajammal Vijaya Kum
The Polymer Society of Korea
: In the present study, the ballistic impact resistance of kevlar reinforced polymer composites and shape memory alloy sheet reinforced kevlar epoxy polymer composites have been compared numerically and experimentally. The test specimens have been fabricated by the hand layup method, and the ballistic impact test has been conducted according to NIJ Level IIIA. In the current research, a new method has been proposed to measure the ballistic impact resistance of the material by using Image J software. From the test results, it has been observed that reinforcement of shape memory alloy in kevlar epoxy polymer composites has increased the ballistic impact resistance by 89-145% for the damaged area compared with plain kevlar reinforced epoxy polymer composite. Also, the damaged area observed in the numerical and the experimental results is almost the same.
P. Sivamurugan, R. Selvam, M. Pandian, Mohd. Shaikhul Ashraf, Inavolu Srinivasa Chakrapani, A. Thanikasalam, P. Roshith, K. Ramesh, and B. Ramesh
Springer Science and Business Media LLC
N. Sathishkumar, R. Selvam, K.M. Kumar, A.H. Abishini, T. Khaleelur Rahman, and S. Mohanaranga
Elsevier BV
B. Ramesh, S. Satish Kumar, I. Saravanan, Ammar H. Elsheikh, R. Selvam, and T. Karthikeyan
AIP Publishing
R. Prabu, K. M. Kumar, R. Selvam, and K. R. Vijaya Kumar
The Polymer Society of Korea
Arunkumar N, Sathishkumar N, Sanmugapriya S.S, and Selvam R
Elsevier BV
R. Selvam, N. Sathishkumar, K.M. Kumar, N. Arunkumar, and T Khaleelur Rahman
IOP Publishing
Abstract The natural fiber reinforced composites are highly utilized in the applications of building and construction industry, storage containers, transportation industry and in other industrial applications. The natural fibers are preferred for its distinct properties than synthetic fibers. Natural fibers are economically cheaper, recyclable and ecologically biodegradable. Many studies were proposed by the researchers to improve the machinability and mechanical behaviour of natural fiber reinforced composites. The addition of filler material is a kind of approach to improve the property of natural fiber reinforced composites. In this study the composite laminates are created by reinforcing bi-directional bast type jute and unidirectional leaf made sisal fibers into an epoxy LY556 resin matrix material. The silicon carbide (SiC) is used as filler material. Two types of composite laminates are manufactured. The first sample is considered in the ratio of 70% epoxy resin to 30% Jute + Sisal fiber composition without any filler material. The second composition includes the ratio of 70% epoxy resin to 30% Jute + Sisal fiber along with 10% SiC as filler material. The hardner HY951 of 10% is used in both compositions. The machining operation was performed by using HSS twist drill for three different machining parameters (Drill bit type, Spindle speed and Feed rate). The circularity and surface roughness are considered as output parameters. The machining is performed in the range of 20 different combinations as directed by the RSM software. The conformation tests are carried out to validate the RSM results. The optimization results shows that the sample with SiC filler exhibits better machinability behaviour than sample without filler material.
R. Selvam, N. Arunkumar, and L. Karunamoorthy
Elsevier BV
R. Selvam, L. Karunamoorthy, and N. Arunkumar
Informa UK Limited
ABSTRACT For machining of composites, abrasive water jet machining is widely employed. For assembly of the machine tool structure, production of slots is essential. In this paper, abrasive water jet machining of composite laminates was experimentally investigated for various cutting parameters in terms of average surface roughness (Ra) and kerf taper (Kt). By generating a response surface model, the experimental values obtained for quality characteristics (Ra and Kt) were empirically related to cutting parameters. The effects of cutting parameters on quality characteristics were analyzed by utilizing empirical models and also optimized within the tested range based on desirability approach. The optimum parameter levels were also validated by confirmation test. From this investigation, it is evident that for obtaining a minimum kerf taper, traverse speed, water pressure, and abrasive mass flow rate are significant parameters and for obtaining less surface roughness traverse speed is the significant parameter.
Selvam Rangasamy, Karunamoorthy Loganathan, and Arunkumar Natesan
Wiley
To maximize the productivity of precise products in manufacturing industries, machine tools should be operated at high speeds. The machine tools should withstand higher cutting speeds, higher acceleration and deceleration and should be cost effective to give high quality products. The aforesaid expectations cannot be fulfilled simultaneously if conventional metal such as cast iron is employed. Hence, there is a need to replace cast iron with alternative materials. In the present work an attempt is made to replace the mini lathe bed made of cast iron with laminated hybrid composites, carbon, and glass/epoxy, to attain superior dynamic properties with less weight. The manufactured composite bed weighs 3.5 times less than that of the existing cast iron bed. Numerical and experimental modal analysis was done for both the cast iron and composite bed. The results show that the experimentally obtained fundamental natural frequency and damping ratio of composite bed are superior, 37% and 3 times, than that of the existing cast iron bed. POLYM. COMPOS., 38:20–26, 2017. © 2015 Society of Plastics Engineers
R. Selvam, N. Arunkumar, and L. Karunamoorthy
Trans Tech Publications, Ltd.
The important material properties associated with laminated hybrid composites are the flexural and interlaminar shear strength (ILSS). These properties are relating the amount of bending and shear stress of a specific material will handle before individual plies fail. In this study the influence of stacking sequence on the flexural and interlaminar shear properties of the fabricated laminated hybrid composites, unidirectional carbon (UD) and bi-directional glass (BD) fabric /epoxy, has been investigated experimentally. The hybrid laminates were fabricated by hand lay-up technique with a total of 12 plies, by varying the position of carbon layers so as to obtain three different stacking sequences. The specimen preparation and the experimentations were carried out according to the ASTM standards. The result indicates by placing the carbon layers away from the neutral axis and at the neutral axis enhances the both flexural and interlaminar shear properties significantly. The failure modes of all specimens were investigated.