Finite element evaluation of projectile nose angle effects in ballistic perforation of high strength fabric

Talebi, Hossein; Wong, Shaw Voon; Hamouda, A.M.S.

doi:10.1016/j.compstruct.2008.02.009

Cited by 71 publications

(39 citation statements)

References 11 publications

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“…As such, the projectile is defined as a rigid body, which means that it is not deformable in the whole process. The Poisson's ratio of it is set as 0.3 [23] . Figure 7 compares the residual velocities from the FE simulation to those from the experimental test when the projectile impacts a single-layer Twaron ® fabric.…”

Section: Validation Of the Modelmentioning

confidence: 99%

Numerical study of inter-yarn friction on the failure of fabrics upon ballistic impacts

2017

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This paper investigates the influence of inter-yarn friction in fabrics on the ballistic performances of the target including failure. Finite element (FE) method was adopted for the study, where FE models were established for two types of fabrics based on the yarn properties of Twaron ® and Dyneema ® , respectively. Numerical analyses on the responses of the primary and secondary yarns in the fabrics subjected to ballistic impact were carried out based on these fabric models. The results show that larger inter-yarn friction leads to less slippage of primary yarns at impact centre. In addition, higher inter-yarn friction make more involvement of the secondary yarns join in loading the impact energy, so as to alleviate the loads in primary yarns and prolong the failure of primary yarns. However，if the inter-yarn friction is too high, beyond coefficient of static friction (CSF) of 0.8 and coefficient of kinetic friction (CKF) of 0.75, the action would be counterproductive. The reason is that the stress at those inter-yarn friction levels would be more concentrated on the primary yarns, resulting in an earlier failure of a fabric.

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Section: Validation Of the Modelmentioning

confidence: 99%

Numerical study of inter-yarn friction on the failure of fabrics upon ballistic impacts

2017

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“…Ballistic behavior of fabrics produced from high-tenacity fibers has been investigated by both experimental and numerical methods [2][3][4][5][6][7][8][9][10][11]. However, a significant deficiency of these studies is that they do not take into account the protective properties of fabrics against blunt trauma with respect to perforation resistance.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of fabric impact behavior

Kędzierski

Popławski

Gieleta

et al. 2015

Composites Part B: Engineering

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“…Published experimental [10,11,19,20] and computational [21][22][23][24] research on fabric protection systems has shown a strong focus on plain weave fabrics. The published record of ballistic testing of nonplain weaves may be characterized as sporadic; only recently has experimental research [25,26] attempted to systematically isolate the effects of weave type on ballistic performance.…”

Section: Introductionmentioning

confidence: 99%

Impact Dynamics Simulation for Multilayer Fabrics of Various Weaves

Shimek

Fahrenthold

2015

AIAA Journal

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The high strength, light weight, and flexibility of fabric protection systems makes them an effective impact mitigation solution in some important engineering applications. Examples include body armor, fan blade containment systems, and orbital debris shielding. Most soft armor protection systems employ a plain weave fabric, suitable for use in flat or slightly curved geometries. However, future fabric protection system designs may employ nonplain weaves to protect highly curved surfaces (such as personnel extremities) or to optimize the performance of protection systems composed of a nonhomogeneous fabric stack. In recent research, the authors developed an improved hybrid particle-element method to simulate the ballistic impact performance of fabric protection systems. The new formulation is the first to address the full range of modeling issues (including penalty-based contact-impact, excessive yarn bending stiffness, and mass or energy discard) that have limited the effectiveness of legacy finite element-based fabric modeling methods for over two decades. Validation simulations modeled three-dimensional perforation dynamics in multilayer fabric stacks, and showed good agreement with new ballistic experiments conducted at three different target-layer counts for two different projectile types and four different weaves. Nomenclature= second Euler parameter coefficient matrix g = generalized nonconservative torque, N · m g e = contact-impact torque, N · m g v = viscous torque, N · m H = semiaxis scaling matrix, m −2 H = transformed semiaxis scaling matrix, m −2 i = vector component i i = particle or element i i; j = particle combination i, j J = moment of inertia matrix, kg · m 2 m = particle mass, kg m p = projectile mass, kg N = number of connected neighbor particles n = number of particles n w = number of particles spanning a yarn P = pressure, Pa q d = generalized nonconservative force, J q p = generalized nonconservative force, J q U = generalized nonconservative force R = rotation matrix r o = element reference length, m s = element length, m s o = element length in the reference configuration, m T = kinetic coenergy, J t = fabric thickness, m U = internal energy, J u = internal energy per unit mass, J · kg −1 u s = step function V = potential energy, J= generic vector in the fixed framê v = generic vector in the corotating frame w = yarn width, m Y = yield stress, Pa Y o = reference yield stress, Pa α = particle semiaxis scaling factor β t = transition particle stretch factor Γ d = damage strain energy release rate, J Γ p = plastic strain energy release rate, J γ = first Euler angle δ ij = Kronecker delta ϵ = total strain ϵ p f = plastic failure strain ϵ e = elastic strain ϵ p = plastic strain ζ = ellipsoidal coordinate ζ R = reference ellipsoidal coordinate η = heat transfer coefficient, J · s −1 · K −1 η p = thermal softening coefficient, K −1 θ = third Euler angle (without superscript) θ = temperature (with superscript), K θ m = melt temperature, K θ o = reference temperature, K θ H = homologous temperat...

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Finite element evaluation of projectile nose angle effects in ballistic perforation of high strength fabric

Cited by 71 publications

References 11 publications

Numerical study of inter-yarn friction on the failure of fabrics upon ballistic impacts

Numerical study of inter-yarn friction on the failure of fabrics upon ballistic impacts

Experimental and numerical investigation of fabric impact behavior

Impact Dynamics Simulation for Multilayer Fabrics of Various Weaves

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