The failure mechanisms in waisted tensile specimens of pultruded 60% volume fraction glass fibre-epoxide were investigated at atmospheric and superposed hydrostatic pressures extending to 350 MN m−2. The maximum principal stress at fracture decreased from ∼1.7 GN m−2 at atmospheric pressure to ∼1.3 GN m−2 at 250 MN m−2 superposed pressure and remained approximately constant at higher pressures, as had been observed with carbon fibre reinforced plastic (CFRP) and a nickel-matrix carbon fibre composite. In the high-pressure region the failure surfaces were fairly flat, consistent with the fracture process being solely controlled by fibre strength. Pre-failure damage, in particular debonding, was initiated at ∼0.95 GN m−2 at atmospheric pressure and this stress rose to ∼1.2 GN m−2 at 300 MN m−2 superposed pressure, i.e. by about 9% per 100 MN m−2. Unlike the pressure dependence in CFRP, this contrasts with the pressure dependence of the resin tensile strength, about 25% per 100 MN m−2, but can be associated with that of the fibre bundle/resin debonding stress, about 12% per 100 MN m−2 superposed pressure. Consistent with this interpretation, glass fibres of the failure surfaces were resin-free, again in contrast to CFRP.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
M. Fuwa, A. R. Bunsell andB. Harris,J. Mater. Sci. 10 (1975) 2062.
M. Fuwa, B. Harris andA. R. Bunsell,J. Phys. D. 8 (1975) 1460.
A. R. Bunsell andD. Valentin,Compos. Struct. 1 (1983) 67.
C. Zweben andB. W. Rosen,J. Mech. Phys. Solids 18 (1970) 189.
D. G. Harlow andS. L. Phoenix,J. Compos. Mater. 12 (1978) 195.
B. W. Rosen,Amer. Inst. Aeronaut. Astronaut. J. 2 (1964) 1985.
T. V. Parry andA. S. Wronski,J. Mater. Sci. 16 (1981) 439.
Idem, ibid. 17 (1982) 893.
A. S. Wronski andT. V. Parry,ibid. 17 (1982) 3656.
Idem, ibid. 19 (1984) 3421.
T. V. Parry andA. S. Wronski,ibid. 20 (1985) 2141.
P. D. Ewins andR. T. Potter,Phil. Trans. R. Soc. A2294 (1980) 507.
A. S. Wronski andM. Pick,J. Mater. Sci. 12 (1977) 28.
A. S. Wronski andT. V. Parry, in Proceedings of 1st International Conference on Post Failure Analysis: Techniques for Fiber Reinforced Composites, Dayton, Ohio, July 1985, edited by F. Fechek (Air Force Wright Aeronautical Laboratories) p. 2–1.
E. Wilkinson, T. V. Parry andA. S. Wronski,Compos. Sci. Technol. 23 (1986) 17.
M. R. Piggott,J. Mater. Sci. 16 (1981) 2837.
D. G. Swift,J. Phys. D., Appl. Phys. 8 (1975) 223.
P. S. Chua andM. R. Piggott,Compos. Sci. Technol. 22 (1985) 33.
Idem, ibid. 22 (1985) 107.
Idem, ibid. 22 (1985) 185.
M. R. Piggott andP. S. Chua,Ind. Eng. Chem. —Product R/D in press.
P. B. Bowden,J. Mater. Sci. 5 (1970) 517.
G. Hondros,Austral. J. Appl. Sci. 10 (1959) 243.
R. Berenbaum andI. Brodie,Br. J. Appl. Phys. 10 (1959) 281.
About this article
Cite this article
Parry, T.V., Wronski, A.S. The tensile properties of pultruded GRP tested under superposed hydrostatic pressure. J Mater Sci 21, 4451–4455 (1986). https://doi.org/10.1007/BF01106570
- Tensile Strength
- Failure Mechanism
- Carbon Fibre
- Tensile Property
- Principal Stress