Fracture toughness, interlaminar

Fig. 5. Interlaminar fracture toughness, for a number of thermosetting and thermoplastic composites (36,37). Open white bars represent glass-fiber composites shaded bars are for carbon fibers. The materials are A, polyester (unidirectional) B, vinyl ester (CSM = chopped strand mat) C, epoxy (R/BR1424) D, epoxy (T300/914) E, PPS F, PES and G, PEEK. To convert J/m to fdbf/in. multiply by 2100.

$Fig. 5. Interlaminar fracture toughness, for a number of thermosetting and thermoplastic composites (36,37). Open white bars represent glass-fiber composites shaded bars are for carbon fibers. The materials are A, polyester (unidirectional) B, vinyl ester (CSM = chopped strand mat) C, epoxy (R/BR1424) D, epoxy (T300/914) E, PPS F, PES and G, PEEK. To convert J/m to fdbf/in. multiply by 2100.$

A number of amorphous thermoplastics are presently employed as matrices in long fiber composites, including polyethersulfone (PES), polysulfone (PSU), and polyetherimide (PEI). AH offer superior resistance to impact loading and higher interlaminar fracture toughnesses than do most epoxies. However, the amorphous nature of such polymers results in a lower solvent resistance, clearly a limitation if composites based on such polymers are to be used in aggressive environments. [Pg.8]

ISO 14130 1997 Fibre-reinforced plastic composites - Determination of apparent interlaminar shear strength by short-beam method ISO 15024 2001 Fibre-reinforced plastic composites - Determination of mode I interlaminar fracture toughness, GIC, for unidirectionally reinforced materials... [Pg.174]

ASTM D 5528 (1994). Mode I interlaminar fracture toughness of unidirectional fiber-reinforced polymer matrix composites. [Pg.85]

O Brien, T.K. and Martin, R.H. (1992). Results of ASTM round robin testing for mode I interlaminar fracture toughness of composite materials, NASA TM 104222. [Pg.90]

The increase in mode II interlaminar fracture toughness is even more significant than the mode 1 interlaminar fracture toughness. The similarity in the changes of magnitude of the mode II fracture toughness and the ILSS with regard to the level of... [Pg.195]

Summary of Mode I and Mode II interlaminar fracture toughness values for unidirectional carbon fiber 828 mPDA epoxy matrix composites with different fiber surface treatments ... [Pg.196]

IMPROVEMENT OF INTERLAMINAR FRACTURE TOUGHNESS WITH INTERFACE CONTROL... [Pg.329]

Chapter 8. Improvement of interlaminar fracture toughness with interface control... [Pg.331]

Fig. 8.2. Composite mode I interlaminar fracture toughness, G[, as a function of respective neat resin toughness, G] ( ) Kim et al. (1992) (O) from Russell and Street (1987) ( ) toughened thermosets and ( ) thermoplasties from Hunston et al. (1987) (A) from Bradley (1989a) ( ) from Jordan and Bradley...

$Fig. 8.2. Composite mode I interlaminar fracture toughness, G[, as a function of respective neat resin toughness, G] ( ) Kim et al. (1992) (O) from Russell and Street (1987) ( ) toughened thermosets and ( ) thermoplasties from Hunston et al. (1987) (A) from Bradley (1989a) ( ) from Jordan and Bradley...$

Damage zone size in mode I fracture and corresponding interlaminar fracture toughness values, G j. and Gji,.. of carbon fiber epoxy matrix composites. ... [Pg.336]

Vf, fiber volume fraction neat resin fracture toughness mode 1 interlaminar fracture toughness of composite G),., mode II interlaminar fracture toughness of composite. [Pg.336]

Interlaminar fracture toughness of various composite materials. ... [Pg.337]

Fig. 8.9, Correlation of residual compression-after-impacl (CAI) strength with composite mode I interlaminar fracture toughness, After Hirschbuehler (1987).

$Fig. 8.9, Correlation of residual compression-after-impacl (CAI) strength with composite mode I interlaminar fracture toughness, After Hirschbuehler (1987).$

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