PVP Siddhartha Institute of Technology

Kanuru, India

PVP Siddhartha Institute of Technology

Kanuru, India
SEARCH FILTERS
Time filter
Source Type

Movva M.,PVP Siddhartha Institute of Technology
Materials Research Express | Year: 2017

Cellulose is an important nanoentity that have been used for the preparation of composites. The present work focuses on the extraction of cellulose from pistachio shell and preparing a partially degradable nanocomposite with extracted cellulose. Physical and microstructural characteristics of nanocellulose extracted from pistachio shell powder (PSP) through various stages of chemical treatment are identified from scanning electron microscopy (SEM), Fourier transform infra-red spectroscopy (FTIR), x-ray powder diffraction (XRD), and thermogravimetric analysis (TGA). Later, characterized nanocellulose is reinforced in a polyester matrix to fabricate nanocellulose-based composites according to the ASTM standard. The resulting nanocellulose composite performance is evaluated in the mechanical perspective through tensile and flexural loading. SEM, FTIR, and XRD showed that the process for extraction is efficient in obtaining 95% crystalline cellulose. Cellulose also showed good thermal stability with a peak thermal degradation temperature of 361 °C. Such cellulose when reinforced in a matrix material showed a noteworthy rise in tensile and flexural strengths of 43 MPa and 127 MPa, at a definite weight percent of 5%. © 2017 IOP Publishing Ltd.


Ravi Kumar P.,PVP Siddhartha Institute of Technology | Mohana Rao K.,VR Siddhartha Engineering College
Materials Today: Proceedings | Year: 2017

Functionally Graded materials have been widely used in engineering applications due to the advantage of smooth and continuous variation in material properties, better fatigue life, less stress concentration, lower thermal stresses and attenuation of stress waves. By intelligently designing material constitutions and gradient distributions of FGMs, structures made of them can have excellent dynamic and thermodynamic characteristics. In the present study Flapwise vibration of rotating functionally graded beam is studied. The effective material properties are determined using Mori Tanaka Method. The natural frequencies are obtained using differential transform method (DTM). The effect of rotating speed, gradient index and hub radius on natural frequency are discussed. © 2017 Elsevier Ltd. All rights reserved.


Abdul Kalam S.,PVP Siddhartha Institute of Technology | Vijaya Kumar R.,Hindustan Aeronautics Ltd | Ranga Janardhana G.,Jawaharlal Nehru Technological University Kakinada
Materials Today: Proceedings | Year: 2017

Bird impact usually occurs during taking off or landing of flights. The aircraft structures should absorb impact energy generated due to ingested birds, ice balls or hail stone and hard body objects. etc. This paper deals with a sensitivity study of hydrodynamic bird models which is performed by numerical simulation. The analysis is carried out by using an explicit Finite Element Analysis (FEA) code AUTODYNE for impact of substitute birds on square plate of rigid Aluminum. The bird body is modeled as a porous water-air material in the shape of a Cylindrical, Cylindrical with Hemispherical ends, Ellipsoidal and Spherical. The finite element bird modeling was carried out by the use of Smooth Particle Hydrodynamics (SPH) method for materials of 10% porosity. The Stagnation and Hugoniot Pressures with time were achieved from four bird models are presented and theoretical results were compared with simulation results. © 2017 Elsevier Ltd. All rights reserved.


Mounika M.,PVP Siddhartha Institute of Technology
International Journal of Mechanical Engineering and Technology | Year: 2017

The main objective of the work is to add value to the agricultural residue by fabricating a partially biodegradable composite that shows the best combination of properties. To achieve this, Pistacia Vera shells are opted and cellulose is extracted from it, of both nano and micro sized. Such cellulose is added as filler, to the long banana fibers reinforced polyester composite. Also, this novel material is characterized by testing tensile strength, flexural strength, impact strength and thermal conductivity. Peak Tensile strength for Pistacia Vera shell banana fiber/nanocellulose reinforced composite is found to be 19% higher than banana fiber based composite. Similarly, Flexural, Impact strength and Thermal conductivity results also exhibited good synergism. © IAEME Publication.


Jyothi B.,Koneru Lakshmaiah College of Engineering | Venu Gopala Rao M.,PVP Siddhartha Institute of Technology
Journal of Electrical Engineering | Year: 2017

This paper aims at the fabrication of five phase induction drive for laboratory purpose from three phase to five phase transformer connection. Here, five phase drive is proposed rather than conventional three phase drive because by increasing the number of phases torque ripples are reduced hence amplitude of the current is reduced without increasing the voltage per phase therefore it increases the reliability of the system. In five phase drive, failure of one phase, the performance does not degrade to that extent in the three phase drive. Considering these advantages than conventional three phase drive fabricated the induction motor. To facilitate five phase supply, obtained from the transformer setup it takes three phase supply as input and five phase supply as obtained as an output by properly connecting the secondary windings of the transformer. Experimental Results are analyzed both three phase to five phase transformer connection scheme and five phase induction motor drive. © 2017, Universitatea Politehnica din Timisoara. All rights reserved.


Samuyelu B.,PVP Siddhartha Institute of Technology | Rajesh Kumar P.,Andhra University
International Journal of Electronics | Year: 2017

This paper proposes an adaptive normalised subband adaptive filtering (NSAF) to accomplish the betterment of NSAF performance. In the proposed NSAF, an extended adaptiveness is introduced from its variants in two ways. In the first way, the step-size is set adaptive, and in the second way, the selection of subbands is set adaptive. Hence, the proposed NSAF is termed here as variable step-size-based NSAF with selected subbands (VS-SNSAF). Experimental investigations are carried out to demonstrate the performance (in terms of convergence) of the VS-SNSAF against the conventional NSAF and its state-of-the-art adaptive variants. The results report the superior performance of VS-SNSAF over the traditional NSAF and its variants. It is also proved for its stability, robustness against noise and substantial computing complexity. © 2017 Informa UK Limited, trading as Taylor & Francis Group


Prasanna Kumar T.J.,PVP Siddhartha Institute of Technology | Narendar S.,Indian Defence Research And Development Laboratory | Gopalakrishnan S.,Indian Institute of Science
Composite Structures | Year: 2013

This paper presents the thermal vibration analysis of single-layer graphene sheet embedded in polymer elastic medium, using the plate theory and nonlocal continuum mechanics for small scale effects. The graphene is modeled based on continuum plate theory and axial stress caused by the thermal effects is also considered. Nonlocal governing equation of motion for this graphene sheet system is derived from the principle of virtual displacements. The closed form solution for thermal-vibration frequencies of a simply supported rectangular nanoplate has been obtained by using the Navier's method of solution. Numerical results obtained by the present theory are compared with available solutions in the literature and the molecular dynamics results. The influences of the small scale coefficient, the room or low temperature, the high temperature, the half wave number and the aspect ratio of nanoplate on the natural frequencies are considered and discussed in detail. The thermal vibration analysis of single- and double-layer graphene sheets are considered for the analysis. The mode shapes of the respective graphene system are also captured in this work. The present analysis results can be used for the design of the next generation of nanodevices that make use of the thermal vibration properties of the graphene. © 2013 Elsevier Ltd.


Ravindrababu J.,Pvp Siddhartha Institute Of Technology | Rao E.V.K.,Andhra Loyola Institute of Engineering and Technology
WSEAS Transactions on Communications | Year: 2013

Direct Sequence Code Division Multiple Access (DS-CDMA) system is well known wireless technology. This system suffers from MAI (Multiple Access Interference) caused by Direct Sequence users. Multi-User Detection schemes were introduced to detect the users' data in presence of MAI. Linear Multi-user Detectors and conventional Matched Filter (MF) are simulated using gold, PN and even kasami sequences as spreading codes in DS-CDMA system. In this paper odd kasami sequence is proposed. For this, odd kasami sequence of length L=2m which inclusive of initial bit, The Bit Error Rate (BER) performance of MMSE Detector provides better than Decorrelating detector and conventional Matched filter. Comparative Study shows that the proposed odd kasami sequence is better performed than gold, PN and even kasami sequences in linear Multi-user Detectors and conventional Matched Filter (MF).


Ravindrababu J.,Pvp Siddhartha Institute Of Technology | Krishna Rao E.V.,Andhra Loyola Institute of Engineering and Technology
WSEAS Transactions on Communications | Year: 2013

Direct Sequence Code Division Multiple Access (DS-CDMA) system is well known wireless technology. This system suffers from MAI (Multiple Access Interference) caused by Direct Sequence users. Multi-User Detection schemes were introduced to detect the users' data in presence of MAI. In Multi stage Partial parallel interference cancellation (MP-PIC) method complexity is more than multi stage conventional PIC (MC-PIC), but performance is better than MC-PIC. In This paper we proposed multi stage subtractive PIC (MS-PIC). In this method the complexity is less than MP-PIC and performance is slightly less than MP-PIC. Now we proposed one more method that is the combination of partial and subtracting parallel interference cancellation (PS-PIC) in multi stage. This method gives to achieve performance improvement and complexity reduction compared to conventional multistage PIC detector.


Ravindrababu J.,Pvp Siddhartha Institute Of Technology | Krishna Rao E.V.,Andhra Loyola Institute of Engineering and Technology
WSEAS Transactions on Communications | Year: 2012

Direct Sequence Code Division Multiple Access (DS-CDMA) system is well known wireless technology. This system suffers from MAI (Multiple Access Interference) caused by Direct Sequence users. Multi-User Detection schemes were introduced to detect the users' data in presence of MAI. Linear Multi-user Detectors and conventional Matched Filter (MF) are simulated using PN and even kasami sequences as spreading codes in DS-CDMA system. In this paper odd kasami sequence is proposed. For this, odd kasami sequence of length L=2m which inclusive of initial bit, The Bit Error Rate (BER) performance of MMSE Detector provides better than Decorrelating detector and conventional Matched filter. Comparative Study shows that the proposed odd kasami sequence is better performed than PN and even kasami sequences in linear Multi-user Detectors and conventional Matched Filter (MF).

Loading PVP Siddhartha Institute of Technology collaborators
Loading PVP Siddhartha Institute of Technology collaborators