Ballistic-performance optimization of a hybrid carbon-nanotube/E-glass reinforced poly-vinyl-ester-epoxy-matrix composite armor

Abstract

The material model for a Multi-Walled Carbon Nanotube (MWCNT) reinforced poly-vinyl-ester-epoxy matrix composite material (carbon nanotube reinforced composite mats, in the following) developed in our recent work [1], has been used in the present work within a transient non-linear dynamics analysis to carry out design optimization of a hybrid polymer-matrix composite armor for the ballistic performance with respect to the impact by a Fragment Simulating Projectile (FSP). The armor is constructed from E-glass continuous-fiber poly-vinyl-ester-epoxy matrix composite laminas interlaced with the carbon nanotube reinforced composite mats. Different designs of the hybrid armor are obtained by varying the location and the thickness of the carbon nanotube reinforced composite mats. The results obtained indicate that at a fixed thickness of the armor, both the position and the thickness of the carbon nanotube reinforced composite mats affect the

The effect of high-pressure densification on ballistic-penetration resistance of a soda-lime glass

“…To overcome these difficulties, an erosion algorithm, which at a predefined level of strain removes the excessively distorted elements, while transferring the momentum associated with the removed nodes to the remaining nodes. Following our prior work [27][28][29][30], the erosion criterion is defined by prescribing a critical value for the instantaneous geometrical equivalent strain.…”

“…elastic þ plastic þ crack) instantaneous strain. The details regarding formulation and parameterization of this model can be found in our previous work [28].…”

“…In this study, both the FSP and the glass plate are modelled using the Lagrange processor. In our recent work [28], a brief discussion was given of how the governing differential equations and the material-model relations define a selfconsistent system of equations for the dependent variables (nodal displacements, nodal velocities, material-element densities, and material-element internal energy densities). In the same reference, a brief overview was provided of the contact/interaction and erosion algorithms implemented in ANSYS/ Autodyn.…”

“…To reduce the effect of reflection of the shock waves at the (outer) hoop surface of the glass plate, the so-called 'transmit' boundary conditions were applied to all the nodes residing on this surface. The transmit boundary conditions enable propagation of the stress waves across the hoop surface without reflection [28].…”

Performance of carbon fiber reinforced rubber composite armour against shaped charge jet penetration

“…The protection ability of woven fabric reinforced rubber composite armour subjected to shape charge jet was studied by X. Jia et al through experiments [6]. Hybridization with one or more fiber type in the composite material provides positive or negative effect on the mechanical properties of the composite material [7][8][9][10].So the protective performance of the composite armour in which the sandwich plate is carbonfiber reinforced composite material plate should study by experiments.…”