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Transactions: WSEAS TRANSACTIONS ON APPLIED AND THEORETICAL MECHANICS
Transactions ID Number: 32-145
Full Name: Umar Farooq
Position: Please, select:
Age: ON
Sex: Male
Address: Built Environment and Engineering Department
Country: UNITED KINGDOM
Tel: 0044 01204 9000600
Tel prefix: 0044 01204 9000600
Fax: +44 (0) 1204 399074
E-mail address: adalzai3@yahoo.co.uk
Other E-mails: uf1res@bolton.ac.uk
Title of the Paper: triangular finite element simulation and prediction of carbon fibrous composite panels under drop-weight impact
Authors as they appear in the Paper: Umar Farooq and Karl Gregory
Email addresses of all the authors: uf1res@bolton.ac.uk, k.r.gregory@bolton.ac.uk
Number of paper pages: 10
Abstract: Abstract:- A triangular finite element computational model was developed to simulate and predict the failure response of carbon fibrous composite panels subjected to low velocity drop-weight impact. Evolution of drop-weight method and its relevance to fibrous composite analysis was briefly described. Mathematical formulation consisting of constitutive, equilibrium, and kinematic relations were introduced. Finite element formulation and failure criteria proposed by Hashin were also introduced. Triangular Finite Element Method (FEM) was chosen to perform simulation in commercially available software ABAQUS incorporating drop-weight velocity amplitudes in time-domain with various input parameters. To improve convergence, triangular element system along with adaptive meshing technique was employed to mesh the regions of high stress gradient with fine meshes and coarse meshes for the rest. Computed stresses were used in Hashin failure criteria and compared against u!
ltimate stresses. Most of the results from the available literature and found to be in good agreement. However, as expected, some values of acceleration parameters were very large. As they were computed from second order derivates, divided by very small time step size produced such larger values. Therefore, a four-point moving average filter was applied to smooth 'noise' from the results. Some of the results from failure threshold loads were selected and included in the form of tables, contour plots and graphs.
Keywords: Keywords:- Finite element analysis; Composite plates; Failure criteria; Adaptive meshing, Moving Average.
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