Perforation of FRP laminates under impact by flat-nosed projectiles

Wu, Qiaoguo; Wen, He; Qin, Y.; Xin, Shihong

doi:10.1016/j.compositesb.2011.08.045

Cited by 33 publications

(12 citation statements)

References 26 publications

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“…Wu et al [16] developed an analytical model for perforation of FRP laminate contained two failure modes including the global deformation with local rupture and wavedominated with local response. The ballistic limit velocity is obtained from energy balance so that the kinetic energy of projectile is absorbed by FRP laminate.…”

Section: Energy Absorbed By Composite Skinsmentioning

confidence: 99%

Analytical modeling for perforation of foam-composite sandwich panels under high-velocity impact

Feli

Jafari

2016

J Braz. Soc. Mech. Sci. Eng.

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choice for fabricating structures where low weight in combination with the high strength and stiffness is required. Foam-composite sandwich panels have great commercial application. They are extensively used in aerospace, automotive, marine, and construction industries due to their inherent advantages over the conventional metals. Over the past recent decades, many researchers have focused on the experimental and theoretical investigations of the transverse impact response of polymer matrix composite laminates in order to gain their failure, energy absorption mechanisms, and the ballistic impact behavior of composites. Ulven et al. [1] investigated the perforation, energy absorption, damage evolution, and ballistic limit velocity on the carbon/epoxy laminates that struck by various projectiles experimentally and analytically. Wen [2] studied the penetration and perforation of FRP (Fiber-Reinforced Plastic) laminates using different projectile shapes in the high-velocity impact and also he proposed analytical equations to predict the depth of penetration and ballistic limit velocity. In addition, Wen [3] displayed the penetration and perforation of thick FRP laminates that struck considering different ended projectiles. Naik et al. [4] presented a new analytical method based on the wave theory for ballistic impact on woven fabric composite. They identified different damage and energy absorbing mechanisms including cone formation on the back face of target, tension in the primary yarns, deformation of secondary yarns, delamination, matrix cracking, shear plugging, and friction during penetration. Feli and Asgari [5] developed a new technique for normal penetration of cylindrical projectiles onto the ceramic-composite targets based on the F.E. simulation using LS-Dyna code. López-Puente et al. [6] employed an analytical model to predict the residual velocity of a cylindrical steel projectile,

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Section: Energy Absorbed By Composite Skinsmentioning

confidence: 99%

Analytical modeling for perforation of foam-composite sandwich panels under high-velocity impact

Feli

Jafari

2016

J Braz. Soc. Mech. Sci. Eng.

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“…Other researchers have looked at the effects of cylindrical projectiles on composite systems [18,19,22]; these tests have often been carried out to aid in the validation of numerical models, as such projectiles ensure uniform contact area on the target composite. There have been numerous attempts to produce numerical models which enable simulation of the impact response of composite systems [18,[20][21][22][23].…”

Section: Of 28mentioning

confidence: 99%

“…This is conceptually a simple effect, but it highlights a key issue with regards to the importance of understanding both the target and projectile during CFRP attack/defeat. Authors such as Caprino et al [13] and Varas et al [23] have investigated the effects of projectile diameter (in the latter case via simulations), while Robinson and Davies [17] investigated the influence of projectile mass and others such as Wu et al [19] have looked at the influence of moving to a cylindrical projectile. However, to the authors' knowledge, no previous systematic experimental study of the effects of projectile geometry on CFRP penetration has been undertaken.…”

Section: Of 28mentioning

confidence: 99%

A study of the penetration behaviour of mild-steel-cored ammunition against boron carbide ceramic armours

Crouch

Appleby-Thomas

Hazell

2015

International Journal of Impact Engineering

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The low mass and high specific strength of composite systems has led to their widespread adoption in aerospace applications. Consequently their performance under impact from offnormal events, or even deliberate insult, for example from a munition such as an anti-aircraft missile, is of paramount importance. Experimental and computational work to-date has typically focused on the response of composite systems to impact from projectiles with simple spherical or cylindrical geometries. However, such geometries are not representative of the full range of likely threats. In addition, even within this simple set of constraints the effects of projectile geometry on composite response under impact have been highlighted. Here an attempt has been made to investigate the effect of more complex geometric structures-comprising two-dimensional flat and peaked-nosed structures-on composite systems. A series of ballistic tests were carried out accelerating various geometric 'fragment simulants' into an aerospace-grade composite material. Damage was monitored in real time using highspeed cameras. Resultant calculations of projectile energy loss in the target, combined with analysis of recovered material via ultrasonic c-scan, have shown a clear relationship between projectile geometry and CFRP failure mode.

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“…FRPs can incur impact damage that may be barely visible including matrix cracking, de-bonding, delamination, and fiber fracture. Even though after impact there is no visible indication of low-energy impact damage on the FRP surface, four types of damage can have detrimental effect on the strength and stiffness of the mechanical and chemical structure [5] [6]. Therefore, to ensure the structural integrity of FRPs, they should be tested periodically during their service time.…”

Section: Introductionmentioning

confidence: 99%

Frequency Dependence of the <i>b</i>-Value Used for Acoustic Emission Analysis of Glass Fiber Reinforced Plastics

Jung¹,

Mizutani²,

Akira³

et al. 2017

OJCM

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Acoustic Emission Testing (AT) is one of the major non-destructive testing methods used for severity evaluation of structures. Amplitude distributions of AE signals are characterized by b-value and the value is mainly used for the severity evaluation of concrete structures until now. The value is assumed to be independent with propagation distance between acoustic emission sources to AE sensors. We evaluate the influence of the wide frequency band encountered in the fracture behavior of glass fiber reinforced plastic (GFRP) on the b-value analysis. In tensile tests, the b-value was determined from an acoustic emission (AE) source generated near a centered hole in a specimen of GFRP. At 15 mm from the hole, the b-value analysis indicated a decreasing trend with increasing tensile stress. At a propagation length of 45 mm, farthest from the hole, a small number of AE signals were received. The attenuation is more rapid for high-frequency AE signals. Thus, the amplitude distribution bandwidth is wide and the b-value changes. This change in b-value for GFRPs is investigated by analyzing the spectral components of the AE signals. For a single-frequency AE source, the b-value is unchanged with propagation length. In contrast, multiple-frequency AE sources produce changes in b-value proportional to the fraction of each spectral component in the received signal. This is due to the frequency dependence of the attenuation with propagation length. From these results, the b-value analysis cannot be applied to considering frequency dependence of AE attenuation.

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Perforation of FRP laminates under impact by flat-nosed projectiles

Cited by 33 publications

References 26 publications

Analytical modeling for perforation of foam-composite sandwich panels under high-velocity impact

Analytical modeling for perforation of foam-composite sandwich panels under high-velocity impact

A study of the penetration behaviour of mild-steel-cored ammunition against boron carbide ceramic armours

Frequency Dependence of the <i>b</i>-Value Used for Acoustic Emission Analysis of Glass Fiber Reinforced Plastics

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Perforation of FRP laminates under impact by flat-nosed projectiles

Cited by 33 publications

References 26 publications

Analytical modeling for perforation of foam-composite sandwich panels under high-velocity impact

Analytical modeling for perforation of foam-composite sandwich panels under high-velocity impact

A study of the penetration behaviour of mild-steel-cored ammunition against boron carbide ceramic armours

Frequency Dependence of the &lt;i&gt;b&lt;/i&gt;-Value Used for Acoustic Emission Analysis of Glass Fiber Reinforced Plastics

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Frequency Dependence of the <i>b</i>-Value Used for Acoustic Emission Analysis of Glass Fiber Reinforced Plastics