Multi-site impact response of S2-glass/epoxy composite laminates

Deka, L. J.; Bartus, S. D.; Vaidya, Uday

doi:10.1016/j.compscitech.2008.03.002

Cited by 74 publications

(36 citation statements)

References 24 publications

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“…Such properties make them a good candidate for the protection of aerospace structures from foreign objects' impact. 1 In fact, sandwich panels are able to provide substantial shielding and good energy absorption characteristics. The behavior of a sandwich structure subjected to an impact loading has been the focus of many studies.…”

Section: Introductionmentioning

confidence: 99%

Influence of nanoclay reinforced polyurethane foam toward composite sandwich structure behavior under high velocity impact

Nasirzadeh

Sabet

2014

Journal of Cellular Plastics

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This study investigates high velocity impact performance of nanoclay reinforced polyurethane foam core composite sandwich panels. The sandwich structure consists of composite facings made from glass fiber woven roving reinforced unsaturated polyester resin and rigid polyurethane foam core with density of 49 kg/m 3 . High velocity impact tests in the range of 100-140 m/s were conducted with 10.7 g semispherical tip steel projectile. The amounts of nanoclay incorporated in the foam core were 0.25, 0.5, 1, and 3 wt%. Small angle x-ray scattering showed the sample containing 0.5 wt% nanoclay has better clay dispersion. Results showed specimen containing 0.5 wt% nanoclay has the highest impact performance and energy absorption as well as lowest projectile residual velocity for the plates that experienced full perforation. The specimen containing 3 wt% nanoclay showed lowest ballistic performance. The presence of nanoclay in the foam structure resulted in an increase in the number of cells per unit volume and reduced cell size.

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Section: Introductionmentioning

confidence: 99%

Influence of nanoclay reinforced polyurethane foam toward composite sandwich structure behavior under high velocity impact

Nasirzadeh

Sabet

2014

Journal of Cellular Plastics

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“…Hosur et al [5] carried out low velocity impact tests on quasi-isotropic CFRP composite laminates. Deka et al [6] explained the multisite impact response of laminate composites. The ballistic and punch-shear response of nanoparticle reinforced vinyl ester panels, laminated face sheets and sandwich composites has been investigated in the present work.…”

Section: Introductionmentioning

confidence: 99%

Energy Absorption of Nano-Reinforced and Sandwich Composites in Ballistic and Low-Velocity Punch-Shear

Pramanik¹,

Mantena²

2012

OJCM

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This paper presents an investigation on energy absorption characteristics of nano-reinforced panels, laminated face sheets and sandwich composites in high velocity ballistic and low velocity punch-shear experiments. The vinyl ester panels were reinforced with 1.25 and 2.5 wt. percent nanoclay and exfoliated graphite platelets. Three different face sheets were manufactured with E-glass, Owens Corning HP ShieldStrand ® glass and T-700 Carbon woven fabric in vinyl ester; and one with the E-glass and graphite platelets impregnated vinyl ester matrix. The sandwich composites were fabricated with balsa, PVC foam, 3-D fiber reinforced Tycor ® and fire resistant fly-ash based Eco-Core ® cores in between E-glass/vinyl ester face sheets. Ballistic tests were conducted according to NIJ level III using a universal receiver equipped with a barrel to launch 0.308 caliber M80 ball round projectile at about 890 m/s. Low velocity punch-shear tests were performed at around 3 m/s according to ASTM D3763 Standard using a drop-weight impact test system. The tortuosity of the fractured surface in nanocomposite specimens has been investigated using digital microscope. In ballistic tests, the 3-D fiber reinforced Tycor ® core provided the most resistance when projectile strikes at the web-flange interface region. The 2.5 wt. pct. graphite platelet reinforced nanocomposite, HP ShieldStrand ® glass vinyl ester face sheets, and E-glass/Eco-Core ® sandwich composite showed the best energy absorption under low velocity punch-shear.

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“…These preceding solutions are currently lighter than referenced steel toe caps, achieving approx. 40% of weight decrease [10]- [13]. Despite of these composite and hybrid material solutions, its main disadvantage is still committed to the mechanical strength performance, when compared to the steel toe caps, requiring a larger volume concept (to counterpoise higher rates of deformation) and in several ways that affects the conception of the main integrant parts.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Quasi-Static Compression Behavior of the Toe Cap Component for Safety Footwear

Costa¹,

Mendonça²,

Peixinho³

2014

IJCTE

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Abstract-Geometrical changes can improve stiffness substantially. The project S3 -Safety Slim Shoe presents the potential to reduce the weight in safety toe cap components combining a new geometric redesign deeply associated to local stiffeners to realize the full potential of AHSS -Advanced High Strength Steels. The investigation aimed to examine the potential energy absorption capacity for a substantial thickness reduction of slim toe cap models. In this paper the normative quasi-static compression test in the context of the experimental validation of the two last and approved prototype models were focused. A non-linear FEA -Finite Element Analysis of the elasto-plastic deformation mode was performed, and several numerical parameters such as: hardening effects of extrapolated True-Stress-Strain material curves and simulation convergence conditions were carried out. Experimental results of the toe cap deformation behavior confront a weight saving range of over 40%, compared with the original steel toe cap.

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Multi-site impact response of S2-glass/epoxy composite laminates

Cited by 74 publications

References 24 publications

Influence of nanoclay reinforced polyurethane foam toward composite sandwich structure behavior under high velocity impact

Influence of nanoclay reinforced polyurethane foam toward composite sandwich structure behavior under high velocity impact

Energy Absorption of Nano-Reinforced and Sandwich Composites in Ballistic and Low-Velocity Punch-Shear

Numerical Simulation of Quasi-Static Compression Behavior of the Toe Cap Component for Safety Footwear

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