Low-velocity impact studies on GFRP and hybrid composite structures

A demand raised is how to improve the survivability of aircraft and naval structures concerning low- and high-velocity impacts. Since fundamental failure is due to mainly by fracture, a fundamental understanding of both mechanisms and mechanics of the material is crucial. It is important to understand the deformation and damage mechanisms involved in the impact to improve the design of composite structures. Several approaches have been exploited to improve the impact damage resistance of composite laminates in different conditions. Among these, the development of composite laminates stacking different fibres in the same matrix results very interestingly. This paper deals to investigate on the high and low speed impact performance of hybrid composite configurations made of glass/carbon and basalt fibres. Low-velocity impact at penetration and high speed tests at different impact velocity were carried out at the room and low temperatures to evaluate the goodness of hybridization proposed and the temperature effect on the composite performances. Among the three proposals, a hybrid basalt carbon configuration was identified as the best both at low speeds and at high impact speeds for both temperatures tested.

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A similitude approach towards the understanding of low velocity impact characteristics of bi-layered hybrid composite structures

Composite Structures ◽

10.1016/j.compstruct.2015.04.055 ◽

2015 ◽

Vol 131 ◽

pp. 183-192 ◽

Cited By ~ 5

Author(s):

Periyasamy Manikandan ◽

Gin Boay Chai

Keyword(s):

Hybrid Composite ◽

Composite Structures ◽

Low Velocity Impact ◽

Low Velocity ◽

Velocity Impact ◽

Impact Characteristics

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Failure initiation in composite structures under low-velocity impact: Analytical studies

Composite Structures ◽

10.1016/j.compstruct.2009.08.024 ◽

2010 ◽

Vol 92 (2) ◽

pp. 436-444 ◽

Cited By ~ 18

Author(s):

Ashish Mishra ◽

N.K. Naik

Keyword(s):

Composite Structures ◽

Low Velocity Impact ◽

Low Velocity ◽

Velocity Impact ◽

Failure Initiation ◽

Analytical Studies

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Dynamic Response of Smart Hybrid Composite Plate Subjected to Low-Velocity Impact

Journal of Composite Materials ◽

10.1177/0021998307075453 ◽

2007 ◽

Vol 41 (19) ◽

pp. 2347-2370 ◽

Cited By ~ 11

Author(s):

S.M.R. Khalili ◽

A. Shokuhfar ◽

F. Ashenai Ghasemi ◽

K. Malekzadeh

Keyword(s):

Dynamic Response ◽

Hybrid Composite ◽

Composite Plate ◽

Low Velocity Impact ◽

Low Velocity ◽

Velocity Impact ◽

Hybrid Composite Plate

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Low Velocity and Compression-After-Impact Response of Pin-Reinforced Sandwich Composites

10.1115/imece1999-0499 ◽

1999 ◽

Author(s):

Uday K. Vaidya ◽

Mohan V. Kamath ◽

Mahesh V. Hosur ◽

Anwarul Haque ◽

Shaik Jeelani

Keyword(s):

Impact Testing ◽

Low Velocity Impact ◽

Sandwich Composites ◽

Low Velocity ◽

Static Compression ◽

Velocity Impact ◽

Transverse Stiffness ◽

Impact Studies ◽

Compression After Impact ◽

The Impact

Abstract In the current work, sandwich composite structures with innovative constructions referred to as Z-pins, or truss core pins are investigated, in conjunction with traditional honeycomb and foam core sandwich constructions, such that they exhibit enhanced transverse stiffness, high damage resistance and furthermore, damage tolerance to impact. While the investigations pertaining to low velocity impact have appeared recently in Vaidya et al. 1999, the current paper deals with compression-after-impact studies conducted to evaluate the residual properties of sandwich composites “with” and “without” reinforced foam cores. The resulting sandwich composites have been investigated for their low velocity (< 5 m/sec) impact loading response using instrumented impact testing at energy levels ranging from 5 J to 50 J impact energy. The transverse stiffness of the cores and their composites has also been evaluated through static compression studies. Compression-after-impact studies were then performed on the sandwich composites with traditional and pin-reinforcement cores. Supporting vibration studies have been conducted to assess the changes in stiffness of the samples as a result of the impact damage. The focus of this paper is on the compression-after-impact (CAI) response and vibration studies with accompanying discussion pertaining to the low velocity impact.

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