S.C. Lakkad

Indian Institute of Technology Bombay

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S. Sharma

Lovely Professional University

A. Bhatnagar

Nirma University

B. Parsons

Centre for the Observation and Modelling of Earthquakes, Volcanoes and Tectonics

B B Miatt

University of Leeds

V. S. Godbole

Indian Institute of Technology Bombay

P.W. Sonparote

Indian Institute of Technology Bombay

H. T. Thorat

Visvesvaraya National Institute of Technology

Dharmendar Kumar Sharma

Maulana Azad National Institute of Technology

K. Shankar

Indian Institute of Technology Madras

Javal Patel

Indian Institute of Technology Bombay

Cooperative Institutions

Indian Institute of Technology Bombay

National Institute of Technology Rourkela

Bhabha Atomic Research Centre

Visvesvaraya National Institute of Technology

Yashwantrao Chavan Maharashtra Open University

National Institute of Technology Uttarakhand

National Institute of Technology Srinagar

Maulana Azad National Institute of Technology

Tokyo Institute of Technology

University of Mumbai

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Mechanical properties of bamboo, a natural composite

Fibre Science and Technology (1981)

S.C. Lakkad Javal Patel

Shear modulus

10.1016/0015-0568(81)90023-3

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Citations (181)

Mechanical properties of carbon/glass fibre reinforced hybrids

Fibre Science and Technology (1982)

P.W. Sonparote S.C. Lakkad

Impact resistance

10.1016/0015-0568(82)90051-3

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Citations (38)

Propagation of stress pulses in a periodically layered elastic composite

Journal of Sound and Vibration (1983)

Ashish Ghosh S.C. Lakkad P. Ramakrishnan

Transfer-matrix method (optics)

Matrix (chemical analysis)

Transfer matrix

10.1016/0022-460x(83)90893-3

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Citations (2)

Mechanical properties of jute-reinforced plastics

Fibre Science and Technology (1981)

Affan Shah S.C. Lakkad

Filler (materials)

Polyester resin

10.1016/0015-0568(81)90030-0

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Citations (196)

The thermal conductivity of a statistically isotropic heterogeneous medium

Journal of Physics D Applied Physics (1972)

S.C. Lakkad B B Miatt B. Parsons

A method for estimating values of the effective constants of a heterogeneous medium, consisting of a continuous and a discontinuous phase, is proposed. This method incorporates a new physical model that reduces this problem of a two-phase system to an equivalent problem of a polycrystalline aggregate. It also takes the inclusion geometry into account in the lower order correlation functions - that is, those of order two and less. The upper and lower bounds and the improvements on them are derived for the thermal conductivity of a statistically isotropic heterogeneous system, and compared with the experimental results of other authors in order to check the effectiveness of this model. Good agreement between theoretical and experimental results is observed in spite of large differences between the conductivity of the two phases, that of the inclusions being about a thousand times that of the matrix. This method can therefore be expected to yield very good results when the differences are small.

Matrix (chemical analysis)

10.1088/0022-3727/5/7/315

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Citations (10)

Temperature and orientation dependence of the strength and moduli of glass reinforced plastics

Fibre Science and Technology (1981)

A. Bhatnagar S.C. Lakkad

Atmospheric temperature range

10.1016/0015-0568(81)90013-0

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Citations (3)

Effect of water absorption on the mechanical properties of bamboo

Journal of Materials Science Letters (1986)

V. S. Godbole S.C. Lakkad

10.1007/bf01748085

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Citations (30)

Comparative study of the effect of fiber surface treatments on the flexural and interlaminar shear strength of carbon fiber-reinforced composites

Materials Today Communications (2020)

S. Sharma S.C. Lakkad

Shear Strength

Direct shear test

10.1016/j.mtcomm.2020.101016

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Citations (17)

Anchoring Effect on the Mechanical Properties of CNTs Grown Carbon Fiber/Polymer Matrix Multi-Scale Composites

Current Nanoscience (2009)

S. Sharma S.C. Lakkad

Carbon fibers were uniformly coated with carbon nanotubes by catalytic decomposition of acetylene using thermal chemical vapor deposition technique at 700 °C. The nanotube coated fibers were employed for the fabrication of unidirectional multi-scale composites with epoxy matrix. As the carbon nanotubes were directly grown on carbon fibers they remain firmly attached with the fiber substrate therefore they are anticipated to modify the interfacial characteristics of the composites and in turn considerably alter the mechanical behavior. Moreover, the direct growth of carbon nanotubes on fiber facilitates uniform distribution of carbon nanotubes in the polymer matrix. The composite specimens made of carbon nanotubes coated fibers showed a significant enhancement of 48% and 85% in the tensile and flexure strength respectively as compared to composites made of carbon fibers undergone similar thermal cycle but without carbon nanotubes growth. The morphology of carbon nanotubes coating on carbon fibers was examined at nano-level using high resolution TEM which showed growth of carbon nanotubes with different morphology and diameter ranging from 5-50 nm. Specimens failed in tensile were further investigated for fractographic analysis using SEM which showed improved fiber/matrix interfacial bonding indicated by less fiber pull out. Keywords: Carbon fibers, carbon nanotubes, composites, surface morphology, electron microscopy, mechanical properties, Raman spectra, fractograpgy

10.2174/157341309788921534

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Citations (3)

Direct measurement of internal friction with continuous variation of frequency

Review of Scientific Instruments (1980)

S.C. Lakkad Y. P. Karnik

A method for the measurement of the internal friction in solids by measuring the instantaneous values of applied sinusoidal stress, the resulting strain and the phase difference between them is presented in this paper. The experimental setup utilizes the instruments normally used in the vibration analysis and the variation of internal friction with frequency can be recorded automatically on a level recorder. The values obtained by this method are compared with those by the amplitude repsonse method for two epoxy resin systems. The agreement is found to be satifactory. The method is very suitable for locating the relaxation peaks up to 2000 Hz.

Internal friction

Measuring instrument

10.1063/1.1136385

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Citations (1)