Energy absorption characteristics of glass/epoxy nano composite laminates by impact loading

Dynamic compressive tests are performed in three frozen soil types under different stress states at freezing temperatures of −5°C and −15°C with impact loading pressures from 0.3 MPa to 0.6 MPa. The effects of frozen soil type, freezing temperature, impact loading pressures, and stress states on incident energy and energy absorption characteristics, such as absorbed energy and energy absorbency rate, are investigated. The experimental results show that most of the incident energy is reflected back to the incident bar, and incident energy linearly increases with the increase of impact loading pressures. Both absorbed energy and energy absorbency rate are found to be negatively correlated with freezing temperature, and there values under confining pressure state are larger than that under uniaxial condition. The effects of confining pressure on absorbed energy are quite different at different freezing temperatures. In addition, frozen soil type also affects absorbed energy and energy absorbency rate. Meanwhile, impact loading pressure shows an increased effect on the absorbed energy, but it has little effect on energy absorbency rate in the research.

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Energy Absorption Characteristics on Aluminum Beams Strengthened with CFRP Laminates under Impact Loading

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.297-300.1344 ◽

2005 ◽

Vol 297-300 ◽

pp. 1344-1349

Author(s):

Seung Min Jang ◽

Yuuki Kawai ◽

Chiaki Sato

Keyword(s):

Energy Absorption ◽

Impact Loading ◽

Displacement Transducer ◽

Cfrp Laminates ◽

Three Point Bending ◽

Reinforced Plastics ◽

Side Door ◽

Impact Tester ◽

The Impact ◽

Absorption Characteristics

In this paper, the energy absorption characteristics on extruded aluminum box-section strengthened with carbon-fiber-reinforced plastics (CFRP) laminates and/or foam material were investigated under impact loading. Impact tests using a pneumatic impact tester were conducted with the specimens in three-point bending flexure with consideration given to the side-door impact beams in vehicles. The absorbed energy to the specimen during the impact was determined from the loaddisplacement curve, which was obtained from the strain gauge attached to the impactor and the laser displacement transducer. From the results, it was found that the strengthening by externally bonding with CFRP laminates improved the impact-induced energy absorption. Also, the effect of the improvement was clearly seen in the case of the use of filling form material in the aluminum extrusion together with attaching CFRP laminates.

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Energy absorption in composite laminates under impact loading

Composites Part B Engineering ◽

10.1016/j.compositesb.2012.06.020 ◽

2013 ◽

Vol 44 (1) ◽

pp. 133-140 ◽

Cited By ~ 43

Author(s):

Marino Quaresimin ◽

Mauro Ricotta ◽

Livio Martello ◽

Stefano Mian

Keyword(s):

Energy Absorption ◽

Impact Loading ◽

Composite Laminates

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Energy Absorption CHaracteristics on Hybrid Beams Strengthened with CFRP Laminates under Impact Loading

The proceedings of the JSME annual meeting ◽

10.1299/jsmemecjo.2004.1.0_227 ◽

2004 ◽

Vol 2004.1 (0) ◽

pp. 227-228

Author(s):

Seung-Min JANG ◽

Yuuki Kawai ◽

Chiaki SATO

Keyword(s):

Energy Absorption ◽

Impact Loading ◽

Cfrp Laminates ◽

Hybrid Beams ◽

Absorption Characteristics

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Impact Loading on Glass/Epoxy Composite Laminates with Nano Clay

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.535-536.72 ◽

2013 ◽

Vol 535-536 ◽

pp. 72-75 ◽

Cited By ~ 2

Author(s):

Ramachandran Velmurugan ◽

G. Balaganesan ◽

N.K. Gupta

Keyword(s):

Analytical Model ◽

Impact Loading ◽

Composite Laminates ◽

Projectile Energy ◽

Ballistic Limit ◽

Nano Composite ◽

Gas Gun ◽

Nano Clay ◽

Set Up ◽

Energy Absorbing

This paper presents various energy absorbing modes in nano composite laminates when subjected to impact loading. Composite laminates, made of 610 gsm WRM(Woven Roving Mat), are prepared by hand lay-up and compression molding technique.Nano clay is dispersed in epoxy and is used as a matrix. Clay dispersion in epoxy is varied from 1% to 5% by weight. A gas gun set up is used to impact the composite laminates with spherical nose cylindrical projectile of diameter 9.5 mm and mass 7.6g.The laminates are subjected to different velocities, which vary from below ballistic limit to above ballistic limit.The vibration response of the laminate at different impact velocities is studied. A time dependent analytical model is used to predict the projectile energy during penetration, and is used to determine the ballistic limit of the laminate. The ballistic limit obtained from experiment is validated with analytical model and good agreement is found.

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