Mechanics of ballistic impact with non-axisymmetric projectiles on thin aluminium targets. Part II: Energy considerations

Stergiou, Theodosios; Baxevanakis, Konstantinos P.; Roy, Anish; Silberschmidt, Vadim V.

doi:10.1016/j.engfailanal.2022.106818

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…This is to be expected since a spherical projectile has a larger contact surface during the impact event than a conical projectile at the same impact velocity. Also, a conical projectile tends to cut through the plies, whereas a spherical projectile induces early delamination, resulting in comparatively higher damaged areas [49].…”

Section: Damage Area Representationmentioning

confidence: 99%

“…This can be attributed to the fact that; the conical projectile impact has been performed at a comparatively greater velocity, and the contact area is lower for a conical projectile when compared with a spherical projectile. The residual velocity obtained from the numerical analysis considering the strain rate effect for all the test cases is represented in Figure 14 [49,50].…”

Section: Rate Dependence Effect On Residual Velocitymentioning

confidence: 99%

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Experimental and Numerical Investigations on the Effect of MWCNT-COOH and Al2O3 Hybrid Nanofillers Dispersed CFRP Laminates Subjected to Projectile Impact

ghosh

Ramajeyathilagam

2023

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Although carbon fiber-reinforced polymer (CFRP) composites have excellent intrinsic mechanical properties, they are vulnerable to impact loads because of their weak inter-laminar fracture toughness, which results in delamination damage. This study presents a novel hybrid nanofiller combination of multi-walled carbon nanotubes (MWCNT) and alumina nanoparticles (Al2O3) to determine improvements in the impact resistance of CFRP laminate. The projectile impact experimental study is carried out on 140 mm × 140 mm × 1.5 mm CFRP laminate with spherical and conical nose shape projectiles. The numerical study of the test plate consisting of six layers is performed, in which each layer is modeled using a shell element and connected through tiebreak contact. Using the Cowper–Symonds equation to determine the dynamic mechanical properties, the numerical validation is established considering the strain rate effect. The results, such as residual velocity, damage area, ballistic limit velocity and delamination obtained from numerical analysis, are compared with the experimental observations. In laminates with hybrid nanofillers, residual velocity decreased by 20% and 9% when spherical and conical projectiles were impacted, respectively. The study indicates that 0.1 wt% MWCNT + 1 wt% Al2O3 nanofiller concentration embedded CFRP offers better resistance against spherical and conical projectile impact.

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Section: Damage Area Representationmentioning

confidence: 99%

Section: Rate Dependence Effect On Residual Velocitymentioning

confidence: 99%