Mahadevan Lakshmanan currently serves as Assistant Professor at the department of Mechanical Engineering, Amrita School of Engineering, Coimbatore Campus. He pursued his MTech in Engineering Design in 2010 from Amrita University. His areas of research include Mechanics and Mechanical Behavior of Composite Structures, Experimental Stress Analysis, Characterization of Polymer Nano Composites.





Publication Type: Journal Article
Year of Publication Publication Type Title
2015 Journal Article R. Reghunath, Lakshmanan, M., and Mini, K. M., “Low velocity impact analysis on glass fiber reinforced composites with varied volume fractions”, IOP Conference Series: Materials Science and Engineering, vol. 73, no. 1, 2015.[Abstract]

This paper presents an experimental study to assess the impact response of bidirectional woven type of glass fiber reinforced composite material with varied volume fractions and hence to find out the optimal volume fraction which gives better impact resistance. The specimens are prepared using vacuum bagging process and the volume fraction is estimated by resin burn off method. For getting information regarding surface topography of the impacted specimen, scanning electron microscopy is conducted. The study is done by slightly varying the velocities and it is found that a volume fraction of 43 -44% gives a better impact resistance which is also confirmed by the scanning electron microscopy test. From the SEM results it is observed that matrix cracking, fiber breakage, debonding and fiber pull out are the major modes of failure during the impact, which reduces the structural strength and stability of the structure.

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2012 Journal Article K. Ma Mini, Lakshmanan, M., Mathew, Lb, and Mukundan, Mb, “Effect of fibre volume fraction on fatigue behaviour of glass fibre reinforced composite”, Fatigue and Fracture of Engineering Materials and Structures, vol. 35, pp. 1160-1166, 2012.[Abstract]

<p>The aim of this paper is to study the fatigue behavior of GFRP composites manufactured by vacuum bagging process by varying the volume fraction. Constant-amplitude flexural fatigue tests were performed at zero mean stress, i.e. a cyclic stress ratio R=-1 by varying the frequency of the testing machine. The relationship between stiffness degradation rate and fibre volume fraction, was observed, and the influence of volume fraction on the tensile strength was also investigated. The results show that, as the volume fraction increases the stiffness degradation rate initially decreases and then increases after reaching a certain limit for the volume fraction. Graph between volume fraction and Young's modulus shows that as the volume fraction increases Young's modulus also increases and reaches a limit and then it decreases with further increase in volume fraction, due to the increase in fibre content which changes the material properties of the composite material. The obtained results are in agreement with the available results. © 2012 Wiley Publishing Ltd.</p>

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2012 Journal Article K. Ma Mini, Lakshmanan, M., Mathew, Lc, and Kaimal, Gd, “Effect of volume fraction on stability analysis of glass fibre reinforced composite plate”, Steel and Composite Structures, vol. 12, pp. 117-127, 2012.[Abstract]

<p>This paper deals with an experimental investigation to study the effect of fibre content on the stability of composite plates with various aspect ratios. Epoxy based glass fibre reinforced composite plates with aspect ratio varying from 0.4 to 1 and with volume fractions of 0.36, 0.4, 0.46, 0.49 and 0.55 are used for the investigation. From the study it is observed that for plate with aspect ratio of 0.5 and 0.4 there is no buckling and the plate got crushed at the middle. As the volume fraction increases the buckling load also increases to a limit and then began to reduce with further increase in fibre content. The optimum range of fibre content for maximum stability is found between 0.49 and 0.55. Polynomial expressions are developed for the study of buckling behaviour of composite plates with different volume fractions in terms of load and aspect ratio.</p>

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Publication Type: Conference Paper
Year of Publication Publication Type Title
2013 Conference Paper K. M. Mini, Lakshmanan, M., and Midhun, R., “Effect of Fiber orientation on Fracture Toughness of Glass/Epoxy and Carbon/Epoxy Composites”, in Indian Conference on Applied Mechanics (INCAM) , IIT, Madras, 2013.[Abstract]

Most of machine elements consist of discontinuities where it is necessary to consider stress distributions from fracture mechanics point of view. In the present work fracture toughness of unidirectional carbon fiber reinforced laminates (CFRP) and glass fiber reinforced laminates (GFRP) with
different fiber orientation angles and single edge notch configurations perpendicular to loading direction are investigated experimentally . Fracture toughness is calculated by determining failure loads and best fiber configuration for fracture toughness is found to be [0/15]s. Studies are extended to investigate the variation in fracture toughness of [0/15]s configuration under the influence of nano particles like CNT.

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2012 Conference Paper M. Lakshmanan, Mini, K. M., and Reghunath, R., “Low Velocity Impact Studies on GFRP composites with different volume fractions”, in Eleventh ISAMPE NationalConference on Composites (INCCOM-11), Amrita University, Coimbatore, 2012.
2009 Conference Paper M. Lakshmanan, Mini, K. M., and Subramanian, K., “Stability of Composite Plates- a Study Using Artificial Neural Networks”, in International Conference on “Operations Research applications in Engineering and Management (ICOREM), Anna University, Tiruchirappali, 2009.
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