Indentation, Penetration and Perforation of Composite Laminate and Sandwich Panels under Quasi-Static and Projectile Loading

Wen, He; Reddy, T.Y.; Reid, S.R.; Soden, P.D.

doi:10.4028/www.scientific.net/kem.141-143.501

Cited by 112 publications

(131 citation statements)

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“…In addition, it was observed that the perforation energy increased with inclination angle in Figure 5 (b) which is in agreement with the work by Zhou et al [19]. Referring to an earlier study by Wen et al [21], the dynamic enhancement factor, Φ, which is defined as the ratio of the dynamic perforation energy for a panel to the energy absorbed up the fracture of the lower skin of an identical panel under quasi-static loading was considered. This parameter is shown to increase with inclination angle as listed in Table 5.…”

Section: Resultssupporting

confidence: 88%

“…Moreover, most of these works are dedicated to ballistic impact [2,20]. Wen et al [21] highlighted three important steps of panel failure during deformation in a sandwich structure; these being (i) initial failure where one of the skins of the panel is fractured with or without considerable deformation of the core; (ii) penetration of the indenter through the thickness of the panel; and (iii) perforation of the panel when the whole of the indenter has emerged through the panel. In addition, there are three different failure modes associated with the initial failure; these being (i) indentation failure; (ii) core shear failure, and (iii) panel bending failure.…”

Section: Introductionmentioning

confidence: 99%

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Perforation behaviour of composites sandwich structures on low-velocity impact at oblique angles

Fadzullah¹,

Ifayefunmi²,

Mustafa³

et al. 2017

Int. J. Automot. Mech. Eng.

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This paper presents the perforation behaviour of polyethylene terephthalate (PET) foam cored sandwich structures when subjected to quasi-static and dynamic loading at normal (0°) and oblique angles of 10° and 20°. An instrumented drop-weight hammer rig was used with fully-clamped conditions for the low-velocity impact test with impact energy of 40 J and velocity of 3.78 m/s. Meanwhile, the quasi-static indentation test was carried out using a universal testing machine via an Instron 4505, at crosshead displacement rate of 1 mm/min, with boundary conditions similar to those of the dynamic test. Results obtained showed that the normal impact generated the highest peak force for both the first and second peaks, which are associated with the damage to the top and bottom skins of the sandwich structures. Moreover, regardless of whether the test was done on the normal or inclined angles, it was observed that the dynamic loading produced higher force magnitude in comparison to those of the quasi-static response, due to the enhanced strength and stiffness of the components because of the strain rate and inertia effects. However, in terms of the damage profiles, it is evident that the maximum damage area increased with the increase inclination angle as supported by simple geometric analysis. For the oblique impact cases, the damage was due to the combined effect of tensile, compression, and shear for impact at 10°. The damage occurred as a result of pure shearing for the 20° impact case. In conclusion, the perforation behaviour at inclined angles allowed more area to be perforated in comparison to those of the normal cases.

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Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Perforation behaviour of composites sandwich structures on low-velocity impact at oblique angles

Fadzullah¹,

Ifayefunmi²,

Mustafa³

et al. 2017

Int. J. Automot. Mech. Eng.

View full text Add to dashboard Cite

show abstract

“…Actually, the crushing resistance of the deformed core, that increases during the test with the foam density, does not allow the deformation of the whole structure that would avoid local indentation phenomena [13].…”

Section: Indentation Modelmentioning

confidence: 99%

Windsurf-Board Sandwich Panels Under Static Indentation

2008

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In recent years composite materials have found application in several fields as sport and sea transportation, where the incidence of the cost of materials is not significant compared with the required high mechanical performances. As a matter of fact, in some sports the whole equipment is nowadays realized in composite materials (i.e. windsurf boards, snowboards). The aim of the present work is to evaluate the mechanical performance of some sandwich structures produced by vacuum bagging technology for the windsurf boards production. The behaviour of the structures is tested under static indentation conditions; different fibres materials, for the skins, and different polystyrene foams, for the core, have been taken into account. In particular both the effect of the kind of fibre (glass, carbon and kevlar fibres) and the effect of the polystyrene cells size (and its density) have been investigated. The purpose was to obtain a stiff structure able to bear localized loads. Additionally, the effects induced on the indentation resistance by both the speed and the diameter of pin have been analysed.

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“…It provides a more complex impact response and damage mechanism. Many researchers have investigated the impact response and damage characteristics of sandwich structures [1][2][3][4][5][6]. Low-velocity impact damage on sandwich laminates is confined to the top skin, the core-top skin interface, and the core material.…”

Section: Introductionmentioning

confidence: 99%

Low velocity impact responses of hollow core sandwich laminate and interply hybrid laminate

Shyr

Pan

2004

Composite Structures

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Indentation, Penetration and Perforation of Composite Laminate and Sandwich Panels under Quasi-Static and Projectile Loading

Cited by 112 publications

References 0 publications

Perforation behaviour of composites sandwich structures on low-velocity impact at oblique angles

Perforation behaviour of composites sandwich structures on low-velocity impact at oblique angles

Windsurf-Board Sandwich Panels Under Static Indentation

Low velocity impact responses of hollow core sandwich laminate and interply hybrid laminate

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