Technical Brief

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

[+] Author and Article Information
Shivdayal Patel

Department of Applied Mechanics,
Indian Institute of Technology Delhi,
New Delhi 110016, India
e-mail: shiv_dayal_patel@live.com

Suhail Ahmad, Puneet Mahajan

Department of Applied Mechanics,
Indian Institute of Technology Delhi,
New Delhi 110016, India

1Corresponding author.

Manuscript received September 30, 2015; final manuscript received May 5, 2016; published online August 19, 2016. Assoc. Editor: Ioannis Kougioumtzoglou.

ASME J. Risk Uncertainty Part B 2(4), 044504 (Aug 19, 2016) (3 pages) Paper No: RISK-15-1101; doi: 10.1115/1.4033575 History: Received September 30, 2015; Accepted May 05, 2016

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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Grahic Jump Location
Fig. 1

Probability of failure of simply supported composite beam

Grahic Jump Location
Fig. 2

Sensitivity behavior of simply supported cross-ply beam

Grahic Jump Location
Fig. 3

Probability of failure of simply supported cross-ply composite beam




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