scholarly journals Dynamic Characteristics of Woven Flax/Epoxy Laminated Composite Plate

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 209
Author(s):  
Venkatachalam Gopalan ◽  
Vimalanand Suthenthiraveerappa ◽  
A. Raja Annamalai ◽  
Santhanakrishnan Manivannan ◽  
Vignesh Pragasam ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dynamic Characteristics ◽  
Composite Plate ◽  
Epoxy Composite ◽  
Laminated Composite ◽  
Composite Plates ◽  
Mechanical Tests ◽  
Fe Model ◽  
Element Analysis

Due to the growing environmental awareness, the development of sustainable green composites is in high demand in composite industries, mainly in the automotive, aircraft, construction and marine applications. This work was an attempt to experimentally and numerically investigate the dynamic characteristics of Woven Flax/Bio epoxy laminated composite plates. In addition, the optimisation study on the dynamic behaviours of the Woven Flax/Bio epoxy composite plate is carried out using the response surface methodology (RSM) by consideration of the various parameters like ply orientation, boundary condition and aspect ratio. The elastic constants of the Woven Flax/Bio epoxy composite lamina needed for the numerical simulation are determined experimentally using two methods, i.e., the usual mechanical tests as well as through the impulse excitation of vibration-based approach and made a comparison between them. The numerical analysis on the free vibration characteristics of the composite was carried out using ANSYS, a finite element analysis (FEA) software. The confirmation of the FE model was accomplished by comparing the numerical results with its experimental counterpart. Finally, a comparison was made between the results obtained through the regression equation and finite element analysis.

scholarly journals A Nondestructive Study Of A Carbon Fibre Epoxy Composite Plate Using Lock-In Thermography, Cyclic Loading, And Finite Element Analysis

2021 ◽  
Author(s):  
Muhammad Saleem
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Strain Gauge ◽  
Composite Plate ◽  
Epoxy Composite ◽  
Medical Application ◽  
Strain Gauges ◽  
Fe Model ◽  
Element Analysis ◽  
Lock In

The goal of this study was to validate the results from infrared thermographic experiment by strain gauge experiments and finite element analysis (FEA) in a carbon epoxy composite plate within the linear elastic limit. A FE model of the plate was first developed and subjected to static loads. The strain values were recorded at four distinct points. Then an experiment using strain gauges was carried out for similar loading conditions and the strains were noted for the corresponding locations. The slope of the correlation plot between the FEA and strain gauge static results indicated that, although the strain gauge experimental values had an overall tendency to overestimate the strain, there was a strong correlation between the data as exhibited by the Pearson coefficient R² = 0.99. Then the stresses calculated from the strain gauge experiment under cyclic tensile loads were used to validate the results from lock-in thermography. These results also showed good agreement as R² was 0.87 and strain gauges experiement tended to underestimate the stress values. From this study, it can be concluded that lock-in thermography can be used to assess stresses in biomaterials used in medical application.

Neural Network Based Buckling Strength Prediction of Laminated Composite Plate with Central Cutout

2014 ◽  
Vol 592-594 ◽  
pp. 560-564 ◽  
Author(s):  
P. Emmanuel Nicholas ◽  
K.P. Padmanaban ◽  
D. Vasudevan ◽  
I. Joseph Selvaraj
Keyword(s):  
Neural Network ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Composite Plate ◽  
Power Transmission ◽  
Laminated Composite ◽  
Composite Plates ◽  
Inspection System ◽  
Laminated Composite Plates ◽  
Element Analysis

Laminated composite plates are greatly used in many applications where high specific strength and stiffness are mandatory. These structures may have holes in order to accommodate windows and doors if it is used for air craft structures or to provide cables and inspection system if it is used in the applications like power transmission systems and automobiles. The laminated composite plates with holes shall be analyzed using finite element analysis. It is necessary to optimize the parameters like thickness, fiber orientation, material and the stacking sequence to obtain the desired characteristics for these structures. But using finite element analysis makes the process more tedious job. With this in mind it is proposed here to construct the artificial neural network to predict the buckling behavior of the composite plate.

scholarly journals A Nondestructive Study Of A Carbon Fibre Epoxy Composite Plate Using Lock-In Thermography, Cyclic Loading, And Finite Element Analysis

2021 ◽  
Author(s):  
Muhammad Saleem
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Strain Gauge ◽  
Composite Plate ◽  
Epoxy Composite ◽  
Medical Application ◽  
Strain Gauges ◽  
Fe Model ◽  
Element Analysis ◽  
Lock In

The goal of this study was to validate the results from infrared thermographic experiment by strain gauge experiments and finite element analysis (FEA) in a carbon epoxy composite plate within the linear elastic limit. A FE model of the plate was first developed and subjected to static loads. The strain values were recorded at four distinct points. Then an experiment using strain gauges was carried out for similar loading conditions and the strains were noted for the corresponding locations. The slope of the correlation plot between the FEA and strain gauge static results indicated that, although the strain gauge experimental values had an overall tendency to overestimate the strain, there was a strong correlation between the data as exhibited by the Pearson coefficient R² = 0.99. Then the stresses calculated from the strain gauge experiment under cyclic tensile loads were used to validate the results from lock-in thermography. These results also showed good agreement as R² was 0.87 and strain gauges experiement tended to underestimate the stress values. From this study, it can be concluded that lock-in thermography can be used to assess stresses in biomaterials used in medical application.

Probabilistic Finite-Element Analysis of S2-Glass Epoxy Composite Beams for Damage Initiation Due to High-Velocity Impact

2016 ◽  
Vol 2 (4) ◽  
Author(s):  
Shivdayal Patel ◽  
Suhail Ahmad ◽  
Puneet Mahajan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
High Velocity ◽  
Laminated Composite ◽  
Composite Plates ◽  
High Velocity Impact ◽  
Element Analysis ◽  
Fiber Failure ◽  
Velocity Impact ◽  
Damage Initiation

The safety predictions of composite armors require a probabilistic analysis to take into consideration scatters in the material properties and initial velocity. Damage initiation laws are used to account for matrix and fiber failure during high-velocity impact. A three-dimensional (3D) stochastic finite-element analysis of laminated composite plates under impact is performed to determine the probability of failure (Pf). The objective is to achieve the safest design of lightweight composite through the most efficient ply arrangement of S2 glass epoxy. Realistic damage initiation models are implemented. The Pf is obtained through the Gaussian process response surface method (GPRSM). The antisymmetric cross-ply arrangement is found to be the safest based on maximum stress and Yen and Hashin criteria simultaneously. Sensitivity analysis is performed to achieve the target reliability.

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