Stochastic finite-element analysis of composite plates due to low velocity impact (LVI) is studied, considering the material properties (Young's modulii, Poisson's ratio, strengths, and fracture energy) and initial velocity as random parameters. Damage initiation and propagation failure due to matrix cracking are investigated for safety criteria for the LVI. Progressive damage mechanics is employed to predict the stochastic dynamic response of the plates. The Gaussian process response surface method (GPRSM) is presently adopted to determine the probability of failure (Pf). There is a possibility of underestimation of the peak contact force and displacement by 10.7% and 11.03%, respectively, if the scatter in the properties is not considered. The sensitivity-based probabilistic design optimization procedure is investigated to achieve better strength and lighter weight of composite for body armors.
Probabilistic Failure of Graphite Epoxy Composite Plates Due to Low Velocity Impact
Department of Applied Mechanics,
Indian Institute of Technology Delhi,
New Delhi 110016, India
Contributed by the Design Automation Committee of ASME for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received August 3, 2016; final manuscript received December 20, 2016; published online January 27, 2017. Assoc. Editor: Zissimos P. Mourelatos.
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Patel, S., and Ahmad, S. (January 27, 2017). "Probabilistic Failure of Graphite Epoxy Composite Plates Due to Low Velocity Impact." ASME. J. Mech. Des. April 2017; 139(4): 044501. https://doi.org/10.1115/1.4035678
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