An analytical model of the dynamic response of circular composite plates to high-velocity impact

2015 ◽  
Vol 85 ◽  
pp. 67-82 ◽  
Author(s):  
A. Schiffer ◽  
W.J. Cantwell ◽  
V.L. Tagarielli
Keyword(s):  
Dynamic Response ◽  
Analytical Model ◽  
High Velocity ◽  
Composite Plates ◽  
High Velocity Impact ◽  
Velocity Impact

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.

scholarly journals High-Velocity Impact Behaviour of Prestressed Composite Plates under Bird Strike Loading

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Sebastian Heimbs ◽  
Tim Bergmann
Keyword(s):  
High Velocity ◽  
Laminated Composite ◽  
Composite Plates ◽  
Bird Strike ◽  
High Velocity Impact ◽  
General Behaviour ◽  
Simulation Accuracy ◽  
Velocity Impact ◽  
Modelling Methodology ◽  
The Impact

An experimental and numerical analysis of the response of laminated composite plates under high-velocity impact loads of soft body gelatine projectiles (artificial birds) is presented. The plates are exposed to tensile and compressive preloads before impact in order to cover realistic loading conditions of representative aeronautic structures under foreign object impact. The modelling methodology for the composite material, delamination interfaces, impact projectile, and preload using the commercial finite element code Abaqus are presented in detail. Finally, the influence of prestress and of different delamination modelling approaches on the impact response is discussed and a comparison to experimental test data is given. Tensile and compressive preloading was found to have an influence on the damage pattern. Although this general behaviour could be predicted well by the simulations, further numerical challenges for improved bird strike simulation accuracy are highlighted.

High velocity impact on preloaded composite plates

2014 ◽  
Vol 111 ◽  
pp. 158-168 ◽  
Author(s):  
S. Heimbs ◽  
T. Bergmann ◽  
D. Schueler ◽  
N. Toso-Pentecôte
Keyword(s):  
High Velocity ◽  
Composite Plates ◽  
High Velocity Impact ◽  
Velocity Impact
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