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Vinayak Kallannavar
National Institute of Technology Karnataka, Surathkal, India

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Journal article
Published: 09 June 2021 in Materials
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The present study deals with the development of a prediction model to investigate the impact of temperature and moisture on the vibration response of a skew laminated composite sandwich (LCS) plate using the artificial neural network (ANN) technique. Firstly, a finite element model is generated to incorporate the hygro-elastic and thermo-elastic characteristics of the LCS plate using first-order shear deformation theory (FSDT). Graphite-epoxy composite laminates are used as the face sheets, and DYAD606 viscoelastic material is used as the core material. Non-linear strain-displacement relations are used to generate the initial stiffness matrix in order to represent the stiffness generated from the uniformly varying temperature and moisture concentrations. The mechanical stiffness matrix is derived using linear strain-displacement associations. Then the results obtained from the numerical model are used to train the ANN. About 11,520 data points were collected from the numerical analysis and were used to train the network using the Levenberg–Marquardt algorithm. The developed ANN model is used to study the influence of various process parameters on the frequency response of the system, and the outcomes are compared with the results obtained from the numerical model. Several numerical examples are presented and conferred to comprehend the influence of temperature and moisture on the LCS plates.

ACS Style

Vinayak Kallannavar; Subhaschandra Kattimani; Manzoore Soudagar; M. Mujtaba; Saad Alshahrani; Muhammad Imran. Neural Network-Based Prediction Model to Investigate the Influence of Temperature and Moisture on Vibration Characteristics of Skew Laminated Composite Sandwich Plates. Materials 2021, 14, 3170 .

AMA Style

Vinayak Kallannavar, Subhaschandra Kattimani, Manzoore Soudagar, M. Mujtaba, Saad Alshahrani, Muhammad Imran. Neural Network-Based Prediction Model to Investigate the Influence of Temperature and Moisture on Vibration Characteristics of Skew Laminated Composite Sandwich Plates. Materials. 2021; 14 (12):3170.

Chicago/Turabian Style

Vinayak Kallannavar; Subhaschandra Kattimani; Manzoore Soudagar; M. Mujtaba; Saad Alshahrani; Muhammad Imran. 2021. "Neural Network-Based Prediction Model to Investigate the Influence of Temperature and Moisture on Vibration Characteristics of Skew Laminated Composite Sandwich Plates." Materials 14, no. 12: 3170.

Conference paper
Published: 01 June 2021 in IOP Conference Series: Materials Science and Engineering
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The current manuscript pacts the finite element investigation of the modal characteristics of the laminated composite sandwich (LCS) plate containing a circular hole. A series of simulations are executed to examine the influence of fiber orientations, edge constraints, the ratio of the thickness of core to face sheet, the radius of hole, and location of the hole on the system on the frequency response of the system. The analysis are carried out using ANSYS simulation tool

ACS Style

Deepak Kumar; Vinayak Kallannavar; Subhaschandra Kattimani; B. Rajendra Prasad Reddy. Dynamic analysis of laminated composite sandwich plates with a circular hole. IOP Conference Series: Materials Science and Engineering 2021, 1136, 012050 .

AMA Style

Deepak Kumar, Vinayak Kallannavar, Subhaschandra Kattimani, B. Rajendra Prasad Reddy. Dynamic analysis of laminated composite sandwich plates with a circular hole. IOP Conference Series: Materials Science and Engineering. 2021; 1136 (1):012050.

Chicago/Turabian Style

Deepak Kumar; Vinayak Kallannavar; Subhaschandra Kattimani; B. Rajendra Prasad Reddy. 2021. "Dynamic analysis of laminated composite sandwich plates with a circular hole." IOP Conference Series: Materials Science and Engineering 1136, no. 1: 012050.

Journal article
Published: 24 September 2020 in Thin-Walled Structures
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This paper is concerned with the effect of variation in temperature and moisture concentration on free vibration response of skew laminated hybrid composite and sandwich plates. The coupled thermo-elastic and hygro-elastic finite element model is formulated using the first-order shear deformation theory (FSDT). Uniform temperature and moisture concentration rise is considered for the analysis. Soft-core viscoelastic materials are considered for the sandwich plates and are modeled using the complex modulus approach. Linear strain-displacement relations are used to develop a mechanical stiffness matrix, and the initial stress stiffness matrix is generated using non-linear strain-displacement relations to represent the non-mechanical stiffness matrix. Numerical examples for the generated finite element model are presented and discussed comprehensively to understand the effect of temperature, moisture concentration, skew angle, length to width ratio, length to thickness ratio, and boundary conditions on the vibration response of the laminated hybrid composite and sandwich plates. Further investigation is devoted to studying the influence of temperature and moisture concentration-dependent material properties, stacking sequence, core to face sheet thickness ratio, and fiber orientation on vibration behavioral response of sandwich and hybrid composite plates.

ACS Style

Vinayak Kallannavar; Balaji Kumaran; S.C. Kattimani. Effect of temperature and moisture on free vibration characteristics of skew laminated hybrid composite and sandwich plates. Thin-Walled Structures 2020, 157, 107113 .

AMA Style

Vinayak Kallannavar, Balaji Kumaran, S.C. Kattimani. Effect of temperature and moisture on free vibration characteristics of skew laminated hybrid composite and sandwich plates. Thin-Walled Structures. 2020; 157 ():107113.

Chicago/Turabian Style

Vinayak Kallannavar; Balaji Kumaran; S.C. Kattimani. 2020. "Effect of temperature and moisture on free vibration characteristics of skew laminated hybrid composite and sandwich plates." Thin-Walled Structures 157, no. : 107113.

Conference paper
Published: 10 January 2020 in PROCEEDINGS OF THE 35TH INTERNATIONAL CONFERENCE OF THE POLYMER PROCESSING SOCIETY (PPS-35)
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The present study deals with the free vibration analysis of laminated compo-site plates containing a circular hole or cut-out. The Finite Element (FE) analysis is used to study the influence of the type of material, size of the hole, aspect ratio of the plate and position of the circular hole on the natural frequency of the system. Three materials namely Glass-Epoxy, Boron-Epoxy and Graphite-Epoxy are considered for the simulation of plates containing a circular hole at the center for different boundary conditions. Influence of dimensions of rectangular plates on natural frequencies is presented by considering different aspect ratios under various boundary conditions. Distinct aspect ratios are achieved by varying length of the plate keeping width dimension constant. The study is also extended to understand the effect of position of the circular hole in the plate on modal behavior of the composite plate under different boundary conditions.

ACS Style

Vinayak Kallannavar; Sagar Umatar; S. Kattimani. Dynamic performance of laminated composite plates with a circular hole. PROCEEDINGS OF THE 35TH INTERNATIONAL CONFERENCE OF THE POLYMER PROCESSING SOCIETY (PPS-35) 2020, 2204, 040032 .

AMA Style

Vinayak Kallannavar, Sagar Umatar, S. Kattimani. Dynamic performance of laminated composite plates with a circular hole. PROCEEDINGS OF THE 35TH INTERNATIONAL CONFERENCE OF THE POLYMER PROCESSING SOCIETY (PPS-35). 2020; 2204 (1):040032.

Chicago/Turabian Style

Vinayak Kallannavar; Sagar Umatar; S. Kattimani. 2020. "Dynamic performance of laminated composite plates with a circular hole." PROCEEDINGS OF THE 35TH INTERNATIONAL CONFERENCE OF THE POLYMER PROCESSING SOCIETY (PPS-35) 2204, no. 1: 040032.

Conference paper
Published: 01 February 2016 in IOP Conference Series: Materials Science and Engineering
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A finite element method was applied to study the various severe plastic deformation processes like, Equal Channel Angular Pressing (ECAP), Tubular Channel Angular Pressing (TCAP), Repetitive Upsetting and Extrusion (RUE) and Constrained Groove Pressing (CGP), considering aluminum AA-390 alloy as specimen material for all these processes. FEA simulation was carried out using AFDEX simulation tool. Effect of the various ECAP process parameters like, die corner angle, channel angle, and the coefficient of friction were analyzed. The die corner angles were divided into 2 equal parts for increasing the effectiveness of ECAP process, thereby increasing the channel number from 2 to 3 and further, their influence on ECAP process was investigated. A 3D simulation of TCAP was carried out for die shapes like triangular and trapezoidal, and variation of the generated stress and strain was plotted. In CGP, four cycle operation was carried out; wherein each cycle is composed of corrugating the specimen and subsequent straightening to original dimension. During RUE process, a maximum effective stress of 683.1 MPa was induced in the specimen after processing it for four complete cycles of RUE process; whereas the maximum strain induced during the same condition was 3.715.

ACS Style

Deepak C Patil; Vinayak Kallannavar; Prabhakar M. Bhovi; S A Kori; K Venkateswarlu. Finite Element Analysis of ECAP, TCAP, RUE and CGP Processes. IOP Conference Series: Materials Science and Engineering 2016, 114, 012007 .

AMA Style

Deepak C Patil, Vinayak Kallannavar, Prabhakar M. Bhovi, S A Kori, K Venkateswarlu. Finite Element Analysis of ECAP, TCAP, RUE and CGP Processes. IOP Conference Series: Materials Science and Engineering. 2016; 114 (1):012007.

Chicago/Turabian Style

Deepak C Patil; Vinayak Kallannavar; Prabhakar M. Bhovi; S A Kori; K Venkateswarlu. 2016. "Finite Element Analysis of ECAP, TCAP, RUE and CGP Processes." IOP Conference Series: Materials Science and Engineering 114, no. 1: 012007.