Finite-element modeling of the ballistic impact of fabric armor

Lim, Chwee Teck; Shim, V.P.W.; Ng, Yeap-Hung

doi:10.1016/s0734-743x(02)00031-3

Cited by 233 publications

(137 citation statements)

References 7 publications

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“…Although such membrane models may lack certain details, membrane 11 model representations of woven fabric continue to be used for ballistic impact simulations. Recently, Lim et al [6] studied the ballistic response of fabric using finite element analysis by 13 modelling the fabric with isotropic membrane elements. Their emphasis was on developing a constitutive relation to represent the viscoelastic behaviour of the material.…”

Section: Nme1596mentioning

confidence: 99%

“…From the specifications, the parameters to construct the woven fabric network structure shown in Figure 1 were ascertained 11 to be L 1 = 0.2 mm and L 0 = 0.844 mm, and the nodal mass was calculated to assume the value m = 9.4 × 10 −5 g. 13 The material constitutive relationship for yarn elements in the fabric model is represented by a linear spring-dashpot Zener viscoelastic model to describe the strain rate sensitivity of 15 the polymer fibre [6]. The constitutive relationship is described by…”

Section: Computational Simulation Of Woven Aramid Fabricmentioning

confidence: 99%

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Modelling inter‐yarn friction in woven fabric armour

Zeng

Tan

Shim

2005

Numerical Meth Engineering

119

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SUMMARYThe effects of inter-yarn friction on the ballistic performance of woven fabric armour are investigated 7 in this paper. Frictional sliding between yarns is implemented in a computational model of the fabric that takes the form of a network. Yarn crimp and its viscoelastic properties are taken into account. 9Ballistic experiments are performed to verify the predictions of the model. Parametric studies show that the ballistic response of woven fabric is very sensitive to yarn friction when the friction coefficient 11 is low but insensitive beyond a certain level. The results also show that very high inter-yarn friction can lead to premature yarn rupture, thus reducing the ability of the fabric to absorb impact energy. 13

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Section: Nme1596mentioning

confidence: 99%

Section: Computational Simulation Of Woven Aramid Fabricmentioning

confidence: 99%

Modelling inter‐yarn friction in woven fabric armour

Zeng

Tan

Shim

2005

Numerical Meth Engineering

119

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“…The simplest model assumes the fabric behaves like a membrane [3,4]. The various membrane models vary in complexity depending on the constitutive model selected for the membrane material.…”

Section: Computational Model Of Woven Fabricmentioning

confidence: 99%

Modelling crimp in woven fabrics subjected to ballistic impact

Tan

Shim

Zeng

2005

International Journal of Impact Engineering

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Woven fabrics are widely used in flexible armour systems for protection against fragments and projectiles from small arms. The woven architecture introduces crimp or undulations in the yarns as they pass alternately over and under orthogonal yarns. An undesirable effect of crimp is excessive deflection in fabric armour during impact. The numerical results of ballistic impact and perforation of woven aramid fabric are presented in this paper. The fabric is modelled as a network of nodal masses connected by one-dimensional viscoelastic elements. The focus of the computational simulation is to compare two different ways of incorporating yarn crimp into the fabric model. Tensile tests on strips of the woven fabric show an initial toe region in the load-deflection curve before the curve asymptotically converges to an approximately straight line beyond a certain strain. The first method of introducing crimp into the fabric model is to include the toe region of the load-deflection curve in the constitutive equation describing the viscoelastic elements. The second method to account for crimp is to physically reflect the woven architecture in the fabric model by arranging the chain of linear elements that define each yarn in a zigzag manner. r

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“…In order to capture the deformation realistically, a uniform element distribution was preferred in sheet meshing as suggested in Ref. [13].…”

Section: Numerical Modelsmentioning

confidence: 99%

The impact responses and the finite element modeling of layered trapezoidal corrugated aluminum core and aluminum sheet interlayer sandwich structures

Kılıçaslan

Güden

Odacı

et al. 2013

Materials & Design (1980-2015)

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a b s t r a c tThe impact responses of brazed and adhesively bonded layered 1050 H14 trapezoidal corrugated aluminum core and aluminum sheet interlayer sandwich panels with 3003 and 1050 H14 aluminum alloy face sheets were investigated in a drop weight tower using spherical, flat and conical end striker tips. The full geometrical models of the tests were implemented using the LS-DYNA. The panels tested with spherical and flat striker tips were not penetrated and experienced slightly higher deformation forces and energy absorptions in 0°/90°corrugated layer orientation than in 0°/0°orientation. However, the panels impacted using a conical striker tip were penetrated/perforated and showed comparably smaller deformation forces and energy absorptions, especially in 0°/90°layer orientation. The simulation and experimental force values were shown to reasonably agree with each other at the large extent of deformation and revealed the progressive fin folding of corrugated core layers and bending of interlayer sheets as the main deformation mechanisms. The experimentally and numerically determined impact velocity sensitivity of the tested panels was attributed to the micro inertial effects which increased the critical buckling loads of fin layers at increasingly high loading rates.

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Finite-element modeling of the ballistic impact of fabric armor

Cited by 233 publications

References 7 publications

Modelling inter‐yarn friction in woven fabric armour

Modelling inter‐yarn friction in woven fabric armour

Modelling crimp in woven fabrics subjected to ballistic impact

The impact responses and the finite element modeling of layered trapezoidal corrugated aluminum core and aluminum sheet interlayer sandwich structures

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