Estimation of residual flexural strength of unidirectional glass fiber reinforced plastic composite laminates under repeated impact load

Abstract

The aim of this study is to investigate the effect of low-velocity multiple impacts at ambient (35℃) and elevated temperature (65℃ and 85℃) on unidirectional glass fiber reinforced plastic (GFRP) composites. Low-velocity repeated impact tests were conducted using a falling weight tower at a constant velocity of 1.5 m/s. The dominant parameters such as energy, contact force, and deflection were recorded during multiple impacts. The residual strength of laminates following repeated impact was evaluated by conducting three-point bending tests with acoustic emission (AE) real time monitoring. The temperature was revealed to play a key role in the impact response of composite materials, especially due to the progressive softening of the epoxy matrix. The nature and extent of damage during multiple impacts at ambient and elevated temperatures was investigated using real time AE monitoring: this analysis indicated delamination as a predominant failure mode, whose extent and criticality depended on temperature and number of impact events.

Keywords

Glass fiber reinforced plastic impact damage acoustic emission residual flexural strength

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References

Belingardi

Cavatorta

Paolino

. Repeated impact response of hand lay-up and vacuum infusion thick glass reinforced laminates. Int J Impact Eng 2008; 35: 609–619.

Sugun

Rao

RMVGK

. Low-velocity characterization of glass, carbon and kevler composites using repeated drop tests. J Reinf Plast Compos 2004; 23: 1583–1599.

Benli

Sayman

. The effects of temperature and thermal stresses on impact damage in laminated composites. Math Comput Appl 2011; 16: 392–403.

Gomez-del Rıo

Zaera

Barbero

. Damage in CFRPs due to low velocity impact at low temperature. Composites Part B 2005; 36: 41–50.

Lopez-Puente

Zaera

Navarro

. The effect of low temperatures on the intermediate and high velocity impact response of CFRPs. Composites Part B 2002; 33: 559–566.

Karasek

Strait

Amateau

. Effect of temperature and moisture on the impact behavior of graphite/epoxy composites: Part II—impact damage. J Compos Technol Res 1995; 171: 11–16.

Kwang-Hee

Cheon-Seok

Sun-Kyu

. Effects of temperature on impact damages in CFRP composite laminates. Composites Part B 2001; 32: 669–682.

Aktaş

Karakuzu

Arman

. Compression-after impact behavior of laminated composite plates subjected to low velocity impact in high temperatures. Compos Struct 2009; 89: 77–82.

Pappas

Kontsos

Loutas

. On the characterization of continuous fiber fracture by quantifying acoustic emission and acousto-ultrasonics waveforms. NDT&E Int 2004; 37: 389–401.

10.

Esposito C, Lizza A, Giordano M, et al. In: IEEE ultrasonics symposium proceeding, Toronto, Canada, 5–8 October 1997, p.649.

11.

Grosse CU and Linzer LM. Signal-based AE analysis. Acoustic emission testing. Berlin-Heidelberg: Springer, 2008, pp.53–99.

12.

Ramirez-Jimenez

Papadakis

Reynolds

. Identification of failure modes in glass/polypropylene composites by means of the primary frequency content of the acoustic emission events. Compos Sci Technol 2004; 64: 1819–1827.

13.

Gutkin

Green

Vangrattanachai

. On acoustic emission for failure investigation in CFRP: pattern recognition and peak frequency analyses. Mech Syst Signal Proces 2011; 25: 1393–1407.

14.

Arumugam

Barath Kumar

Santulli

. Effect of fiber orientation in uni-directional glass epoxy laminate using acoustic emission monitoring. Acta Metall Sin (Engl Lett) 2011; 24: 351–364.

15.

Berthelot

Rhazi

. Acoustic emission in carbon fiber reinforced composites. Compos Sci Technol 1990; 37: 411–428.

16.

Santos

Amaro

. Low velocity impact damage evaluation in fiber glass composite plates using PZT sensors. Composites Part B 2013; 55: 269–276.

17.

Benevolenski

Karger-Kocsis

Mieck

. Instrumented perforation impact response of polypropylene composites with hybrid reinforcement flax/glass and flax/cellulose fibers. J Thermoplast Compos Mater 2000; 13: 481–496.

18.

Santulli

. Study of impact hysteresis curves on E-glass reinforced polypropylene laminates. J Mater Sci Lett 2003; 22: 1557–1562.

19.

Aggelis

Barkoula

Matikas

. Acoustic emission as a tool for damage identification and characterization in glass reinforced cross ply laminates. Appl Compos Mater 2013; 20: 489–503.

20.

Arumugam V, Adhithya Plato Sidharth A and Santulli C. Failure modes characterization of impacted CFRP laminates under compression loading using acoustic emission. J Compos Mater. Epub ahead of print 14 November 2013. DOI: 10.1177/0021998313509504.

21.

Arumugam

Kumar

Santulli

. Identification of failure modes in composites from clustered acoustic emission data using pattern recognition and wavelet transformation. Arab J Sci Eng 2013; 38: 1087–1102.

22.

Bussiba

Kupiec

Ifergane

. Damage evolution and fracture events sequence in various composites by acoustic emission technique. Compos Sci Technol 2008; 68: 1144–1155.

23.

Ono

. Amplitude distribution analysis of acoustic emission signals. Mater Eval 1976; 34: 177–184.

24.

Santulli

. Review. Impact properties of glass/plant fibre hybrid laminates. J Mater Sci 2007; 42: 3699–3707.