Akshay Prakash Kalgutkar

@iitb.ac.in

Department of Civil Engineering
Indian Institute Of Technology Bombay

https://researchid.co/akshaykalgutkar1

RESEARCH, TEACHING, or OTHER INTERESTS

Civil and Structural Engineering, Computational Mechanics

Scopus Publications

Scholar Citations

Scholar h-index

Scholar i10-index

Scopus Publications

Influence of local stiffeners and non-uniform edge loads on the stability characteristics of composite laminates with a circular opening
T. Rajanna, Asha Kumar, Sasha Azimi, P. K. Ravindra, and Akshay Prakash Kalgutkar
Informa UK Limited

Buckling analysis of perforated stiffened composite plates with interfacial debonding under hygrothermal and in-plane edge loadings
Akshay Prakash Kalgutkar and Sauvik Banerjee
SAGE Publications
Engineered composite structures often incorporate stiffeners to enhance the strength of perforated panels without significantly increasing their mass. However, interfacial debonding between the stiffener and skin can compromise structural integrity under external loads, potentially leading to failure. This study focuses on the buckling behaviour of stiffened perforated laminated plates with interfacial debonding, subjected to non-uniform edge loading and environmental conditions. A computationally efficient reduced-order finite element (FE) formulation has been devised using the 2D plate and 1D beam elements to minimise the computational cost. The plate and stiffener flange are modelled using a 9-noded heterosis element to address shear-locking, while a 3-noded isoparametric beam element represents the stiffener web and ribs. To account for stiffener torsional behaviour, a torsion correction factor is incorporated into the stiffener web and ribs formulation. Interfacial debonding is simulated by introducing a dummy node with an independent displacement field for the stiffener flange, connected by the fictitious spring between the plate and the penetrated flange nodes, to prevent nodal interpenetration. Displacement continuity is enforced in the bonded regions to maintain compatibility between the stiffener and plate displacement fields. The study employs a dynamic approach to evaluate buckling loads under two boundary conditions, considering operational and environmental effects. Additionally, hygrothermal-dependent material properties are considered to incorporate the effect of hygrothermal loading on the elastic behaviour of the material. A preliminary investigation identifies an optimal loading pattern and cutout geometry for enhanced buckling performance. In contrast to prior research, this work examines various stiffener configurations to evaluate the stability of perforated plates under non-uniform edge loading and determines the configuration that improves buckling capacity. The analysis indicates that the circular cutout panel incorporating the SP-3 stiffener configuration demonstrates a 42.86% improvement in buckling resistance compared to the SP-2 stiffener design. Furthermore, debonding significantly reduces the buckling capacity of the CCSS panel by 20.14%, especially at greater stiffener depths of d s /b s = 7 under hygrothermal conditions. Moreover, larger cutout sizes exacerbate stability reductions of the CCSS panel by 2.70% due to debonding under the reference hygrothermal state. In contrast, debonding under hygrothermal conditions results in a 38.44% reduction in the buckling strength of the smaller cutout SSCC panel, highlighting the impact of restraint conditions. Therefore, this study serves as a foundation for optimising designs to ensure stability, durability, and cost-effectiveness in demanding operational scenarios.

Influence of stiffeners on the buckling behaviour of composite panels subjected to non-uniform edge loads

Interaction of ultrasonic guided waves with interfacial debonding in a stiffened composite plate under variable temperature and operational conditions
Akshay Prakash Kalgutkar and Sauvik Banerjee
Elsevier BV

Buckling behaviour of the stiffened hygrothermally stable composite plates with interfacial debond subjected to environmental and operational loading conditions
Akshay Prakash Kalgutkar and Sauvik Banerjee
Springer Science and Business Media LLC

Guided Wave based Structural Health Monitoring of Composite Wind Turbine Blades

Free vibration analysis of hygrothermally stable stiffened composite plates with plate-stiffener interfacial debonding
Akshay Prakash Kalgutkar and Sauvik Banerjee
Informa UK Limited

Stability Performance of Perforated Stiffened Laminated Composite Plates under the Influence of Environmental and Operational Loading Conditions Using FE Approach
Akshay Prakash Kalgutkar and Sauvik Banerjee
World Scientific Pub Co Pte Ltd
Eccentrically stiffened plates are widely used as a structural component in many engineering applications. However, these structures are exposed to complex loading conditions, resulting in strength reduction leading to failure. This research aims to examine the stability performance of the perforated stiffened laminated composite plate subjected to non-uniform edge load under the influence of environmental conditions. Towards this, a robust and computationally efficient finite element (FE) formulation has been developed, where the plate is modeled using a 9-noded heterosis element to avoid the shear locking of the plate element and a 3-noded isoparametric beam element is adopted to model the stiffener by applying a displacement compatibility condition at the skin-stringer interface. A torsion correction factor is introduced in the beam formulation to account for the twisting of the stiffener. A unique dynamic technique is utilized to obtain the buckling load by employing two types of boundary conditions due to the non-uniform stress distribution in the perforated plate under environmental and operational loading conditions. An analysis is performed on the unstiffened plate to determine a suitable cutout shape, loading pattern and lamina scheme based on its improved stability performance. Unlike previous studies, several stiffener configurations are considered to comprehend the influence of temperature and moisture on the stability behavior of centrally placed cutout plates and obtain a stiffener configuration with improved performance. It is noticed that when the perforated stiffened plate is exposed to thermal or hygroscopic load close to a critical temperature or moisture, the buckling capacity drops suddenly in the plate attached to a stiffener of greater depth. Moreover, it is observed that when the stiffened plate is exposed to higher intensity of hygrothermal load, the plate’s buckling capacity drops significantly as the thickness of the plate reduces.

EFFECT OF DEBONDING ON GUIDED WAVE PROPAGATION IN STIFFENED COMPOSITE PLATE UNDER OPERATIONAL LOADING AND HYGROTHERMAL ENVIRONMENT

Effect of elliptical cutouts on buckling and vibration characteristics of stiffened composite panels under non-uniform edge loads
Akshay Prakash Kalgutkar, Sauvik Banerjee, and T. Rajanna
Informa UK Limited
Abstract This study is motivated by the need to understand the effect of elliptical cutouts on the buckling and vibration characteristics of stiffened composite panels under the influence of various types of non-uniform in-plane edge loads. The study is carried out by using a Finite Element (FE) formulation wherein the plate, and the stiffener are discretized by employing a 9-noded heterosis plate element and a 3-noded isoparametric beam element, respectively. The contributions of shear deformation and rotary inertia are considered in the FE formulation. Since the stress distribution within the panel is highly non-uniform for a given loading and geometric imperfection, a dynamic approach has been adopted to solve the buckling problem wherein two sets of boundary conditions are used to calculate the pre-buckling stresses and the buckling load of the stiffened panel. A new structured mesh pattern is proposed to house the stiffeners attached to the centrally located elliptical cutout panel in the form of a grid so that the stiffener can be attached anywhere and in any direction as per the requirements. The influences of various parameters, such as ply orientation, cutout size, cutout orientation, boundary conditions and depth to width ratio of the stiffener, are examined in detail. From the analysis, it is noticed that the depth of the stiffener has a significant effect on the buckling and vibration characteristics of the panel.

Dynamic instability analysis of perforated stiffened laminated composite panels subjected to non-uniform in-plane edge load under hygrothermal condition
Akshay Prakash Kalgutkar and Sauvik Banerjee
Elsevier BV

Optimum arrangement of stiffener on the buckling behaviour of stiffened composite panels with reinforced elliptical cutouts subjected to non-uniform edge load

Vibration Analysis of Functionally Graded Material Plate
N. I. Narayanan, Sauvik Banerjee, Akshay Prakash Kalgutkar, and T. Rajanna
Springer Singapore

RECENT SCHOLAR PUBLICATIONS

A Hybrid Hierarchical Health Monitoring Solution for Autonomous Detection, Localization and Quantification of Damage Sources in Composite Wind Turbine Blades
N Holsamudrkar, S Sikdar, AP Kalgutkar, S Banerjee, R Mishra
2025

Buckling analysis of perforated stiffened composite plates with interfacial debonding under hygrothermal and in-plane edge loadings
AP Kalgutkar, S Banerjee
Journal of Composite Materials, 00219983251319091 2025

A Hybrid Theoretical-Numerical-Experimental Framework for Robust Health Monitoring of Thin-Walled Hollow Composite Members using Guided Waves
AP Kalgutkar, S Sikdar, S Banerjee, K Walton, R Mishra
2025

Influence of local stiffeners and non-uniform edge loads on the stability characteristics of composite laminates with a circular opening
T Rajanna, A Kumar, S Azimi, PK Ravindra, AP Kalgutkar
Mechanics Based Design of Structures and Machines, 1-15 2024

Free vibration analysis of hygrothermally stable stiffened composite plates with plate-stiffener interfacial debonding
AP Kalgutkar, S Banerjee
Mechanics of Advanced Materials and Structures 31 (29), 11337-11351 2024

Influence of stiffeners on the buckling behaviour of composite panels subjected to non-uniform edge loads
S Azimi, T Rajanna, K Asha, PK Ravindra, AP Kalgutkar
Latin American Journal of Solids and Structures 21 (8), e557 2024

Interaction of ultrasonic guided waves with interfacial debonding in a stiffened composite plate under variable temperature and operational conditions
AP Kalgutkar, S Banerjee
Ultrasonics 142, 107378 2024

Buckling behaviour of the stiffened hygrothermally stable composite plates with interfacial debond subjected to environmental and operational loading conditions
AP Kalgutkar, S Banerjee
Acta Mechanica 235 (6), 3915-3931 2024

Guided Wave based Structural Health Monitoring of Composite Wind Turbine Blades
S Sikdar, AP Kalgutkar, S Banerjee
Proceedings of the Annual British Conference on Non-Destructive Testing 2024 2024

Effect of elliptical cutouts on buckling and vibration characteristics of stiffened composite panels under non-uniform edge loads
AP Kalgutkar, S Banerjee, T Rajanna
Mechanics Based Design of Structures and Machines 51 (9), 5340-5354 2023

Stability performance of perforated stiffened laminated composite plates under the influence of environmental and operational loading conditions using FE approach
AP Kalgutkar, S Banerjee
International Journal of Structural Stability and Dynamics 23 (09), 2350098 2023

Effect of Debonding on Guided Wave Propagation in Stiffened Composite Plate Under Operational Loading and Hygrothermal Environment
AP Kalgutkar, S Banerjee
9th ECCOMAS Thematic Conference on Computational Methods in Structural 2023

Semi-Analytical Finite Element Method for the Analysis of Guided Wave Dispersion in the Pre-stressed Composite Plates
AP Kalgutkar, S Banerjee
ASPS Conference Proceedings 1 (5), 1413-1421 2022

Dynamic instability analysis of perforated stiffened laminated composite panels subjected to non-uniform in-plane edge load under hygrothermal condition
AP Kalgutkar, S Banerjee
Thin-Walled Structures 181, 109961 2022

Optimum arrangement of stiffener on the buckling behaviour of stiffened composite panels with reinforced elliptical cutouts subjected to non-uniform edge load
AP Kalgutkar, S Banerjee, T Rajanna
Steel and Composite Structures, An International Journal 42 (4), 427-446 2022

Stability and Vibration Behaviour of Debonded Stiffened Composite Laminated Panels with Cutouts Under the Influence of Hygrothermal Loading
AP Kalgutkar
66th International Congress of Indian Society of Theoretical and Applied 2021

Vibration Analysis of Functionally Graded Material Plate
NI Narayanan, S Banerjee, AP Kalgutkar, T Rajanna
Recent Advances in Computational Mechanics and Simulations: Volume-I 2021

Vibration Analysis of Functionally
NI Narayanan, S Banerjee, AP Kalgutkar, T Rajanna
Recent Advances in Computational Mechanics and Simulations: Volume-I 2020

Deflection and Modal Analysis of the Square Plate using ABAQUS CAE
N Holsamudrakar, AP Kalgutkar, N Pisal
Indian Institute of Technology Bombay 2019

Vibration and Buckling Behaviour of Quasi-isotropic laminated plates with and without cutout subjected to partial and concentrated in-plane edge loads
AP Kalgutkar, T Rajanna
B. M. S College of Engineering 2018

MOST CITED SCHOLAR PUBLICATIONS

Semi-Analytical Finite Element Method for the Analysis of Guided Wave Dispersion in the Pre-stressed Composite Plates
AP Kalgutkar, S Banerjee
ASPS Conference Proceedings 1 (5), 1413-1421 2022
Citations: 6

Vibration Analysis of Functionally Graded Material Plate
NI Narayanan, S Banerjee, AP Kalgutkar, T Rajanna
Recent Advances in Computational Mechanics and Simulations: Volume-I 2021
Citations: 1