Mode III interlaminar fracture and damage characterization in woven fabric-reinforced glass/epoxy composite laminates

Abstract

The increasing use of composite materials in industry leads to the need for a detailed investigation on fiber-reinforced composite joints. In the present study, fracture behavior of woven fabric-reinforced glass/epoxy composite laminates under mode III crack growth was experimentally investigated and numerically modeled. Two methods were used for the calculation of the strain energy release rate: the experimental compliance calibration method and the virtual crack closure technique. To achieve this aim, edge crack torsion was used to evaluate fracture toughness in mode III loading (out of plane-shear) at different crack lengths. Load–displacement and associated energy release rates were obtained for various cases of interest. To calculate fracture toughness J_III, two criteria were considered in load–displacement curve which included non-linearity and maximum points; it was observed that J_III increased with the increase of crack length. Based on the finite element analysis, the recommended crack length range was given in order to design a configuration which would give 97% mode III contribution to the total energy release rate. Both the experimental compliance method and the virtual crack closure technique proved applicable for the interpretation of the fracture mechanics data of woven glass/epoxy laminates in mode III.

Keywords

Mode III fracture composite crack growth finite element

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References

Suemasu

Hososda

Nara

. An experimental study of interlaminar toughness of satin woven fabric composite. J Japan Soc Compos Mater 1987; 13: 225–232.

Wang

Suemasu

Zahlan

. Interlaminar fracture of random short-fiber SMC composite. J Compos Mater 1984; 18: 574–594.

Pereira

de Morais

de Moura

MFSF

. Mode I interlaminar fracture of woven glass/epoxy multidirectional laminates. Compos Part A 2005; 36: 1119–1127.

Carlsson

Gillespie

Pipes

. On the analysis and design of end notched flexure (ENF) specimen for measuring mode II fracture toughness. J Compos Mater 1986; 20: 594–604.

Blackman

BRK

Brunner

Williams

. Mode II fracture testing of composites: a new look at an old problem. Eng Fract Mech 2006; 73: 2443–2455.

Reeder

. Refinements to the mixed-mode bending test for delamination toughness. J Compos Technol Res 2003; 25: 191–195.

Dharmawan

Simpson

Herszberg

. Mixed mode fracture toughness of GFRP composites. Compos Struct 2006; 75: 328–338.

Choupani

. Experimental and numerical investigation of the mixed-mode delamination in Arcan laminated specimens. Mater Sci Eng A 2008; 487: 229–242.

ASTM. Test method for mode I interlaminar fracture toughness of unidirectional fiber-reinforced polymer matrix composites. ASTM standard D 5528-01. W. Conshohocken, PA: ASTM Int., 2007.

10.

ASTM. Standard test method for mixed mode I-mode II interlaminar fracture toughness of unidirectional fiber reinforced polymer matrix composites. ASTM standard D 6671-01. W. Conshohocken, PA: ASTM Int., 2007.

11.

Becht

Gillespie

JRJW

. Design and analysis of the crack rail shear specimen for mode III interlaminar fracture. Compos Sci Technol 1988; 31: 143–157.

12.

Donaldson

. Mode III interlaminar fracture characterization of composite materials. Compos Sci Technol 1988; 32: 225–249.

13.

Hwang

S-F

C-L

. Tearing mode interlaminar fracture toughness of composite materials. Polym Compos 2001; 22: 57–64.

14.

Sharif

Kortschot

Martin

Mode III delamination using a split cantilever beam. In: Martin

(ed.) Composite materials: fatigue and fracture, Philadelphia: ASTM STP 1230, ASTM, 1995, pp. 85–99.

15.

Trakas

Kortschot

The relationship between critical strain energy release rate and fracture mode multidirectional carbon fiber/epoxy laminates. In: Armanios

(ed.) Composite materials: fatigue and fracture, ASTM: ASTM STP 1285, 1997, pp. 283–304.

16.

Szekrényes

. Improved analysis of the modified split-cantilever beam for mode-III fracture. Int J Mech Sci 2009; 51: 682–693.

17.

Lee

. An edge crack torsion method for mode III delamination fracture testing. J Compos Technol Res 1993; 15: 193–201.

18.

Liao

Sun

. The determination of mode III fracture toughness in thick composite laminates. Compos Sci Technol 1996; 56: 489–499.

19.

Zhao

Wang

. Mode III fracture behavior of laminated composite with edge crack in torsion. Theor Appl Fract Mech 1998; 29: 109–123.

20.

Suemasu

. An experimental method to measure the mode-III interlaminar fracture toughness of composite materials. Compos Sci Technol 1999; 59: 1015–1021.

21.

Carlsson

Davies

. Influence of fiber volume fraction on mode III interlaminar fracture toughness of glass/epoxy composites. Compos Sci Technol 2004; 64: 1279–1286.

22.

Marat-Mendes

de Freitas

. Characterization of the edge crack torsion (ECT) test for the measurement of the mode III interlaminar fracture toughness. Eng Fract Mech 2009; 76: 2799–2809.

23.

ASTM. Standard test method for tensile properties of polymer matrix composite materials. ASTM standard D 3039/D 3039M-07. W. Conshohocken, PA: ASTM Int., 2008.

24.

Gay D, Hoa SV and Tsai SW. Composite materials: design and Applications. CRC Press, 2003.

25.

O’Brien

. Simplified data reduction methods for the ECT test for mode III interlaminar fracture toughness. J Compos Technol Res 1996; 18: 96–101.

26.

Lee

. Evaluation of the edge crack torsion (ECT) test for mode III interlaminar fracture toughness of laminated composites. J Compos Technol Res 1997; 19: 174–183.

27.

Ratcliffe JG. Characterization of the edge crack torsion (ECT) test for mode III fracture toughness measurement of laminated composites. NASA/TM-2004-213269, 2004.

28.

Pennas

Cantwell

. The influence of strain rate on the mode III interlaminar fracture of composite materials. J Compos Mater 2007; 41: 2595–2614.

29.

Krueger R. The virtual crack-closure technique: history, approach and applications. ICASE Report 2002-10. NASA/CR-2002-211628.