Page 377 - Mechanics Analysis Composite Materials

362 Mechanics and analysis of composite materials

Fig. 7.53. Residual strains in a .tq5 angle-ply filament wound glass+poxy cylinder, -calculation, o
experiment.

where E1 and Z2 are given by Eqs. (7.81), B,, =A,,h, where A,, are specified by
Eqs. (4.72), and h is the cylinder thickness. Results of calculation for experimental
cylinder studied by Morozov and Popkova (1987) are presented in Fig. 7.53.
As follows from Figs. 7.52 and 7.53, approach described above and based on
constitutive equations for laminates, Eqs. (7.23), with shrinkage characteristics of a
unidirectional ply or an elementary layer determined experimentally provides fair
agreement of predicted results with experimental data.

7.5. References

Anderson, J.A., Mikelsons, M.Ya., Tamuzh, V.P. and Taraschuch, I.V. (1991). Fatigue failure of
laminated carbon-fiber-reinforced plastic. J. Mech. Composite Muter. 27 (I), 74-78.
Apinis, R.P., Mikelsons, M.Ya. and Khonichev, V.I. (1991). Fatigue resistance of carbon material in
symmetric tension-compression. Mech. Composite Mater. 5, 928-930, (in Russian).
Barnes, J.A., Simms, I.J., Farrow, G.J., Jackson, D., Wostenholm, G. and Yates, B. (1989). Thermal
expansion behavior of thermoplastic composite materials. In Proc. Am. Soc. for Composite Mater.,
Fourth Tech. Conf., Blacksburg, Virginia. Technomic Publ. pp. 717-725.
Ha, S.K. and Springer, G.S. (1987). Mechanical properties of graphite epoxy composites at elevated
temperatures. In Proc. 6th Int. Conf. on Composite Materials (ICCM-6), July 1987, Vol. 4, (F.L.
Matthews et al. eds.), Elsevier Applied Science, London, pp. 422430.
Hamilton, J.G. and Patterson, J.M. (1993). Design and analysis of near-zero CTE laminates and
application to spacecraft. In Proc. 9th hi. Con$ on Composite Materials (ICCMI9), Madrid, 12-16
July, Vol. 6, Composite Properties and Applications, Univ. of Zaragoza, Woodhead Publ. Ltd.,
pp. 108-119.
Hyer, M.W. (1989). Mechanics of Unsymmetric Laminates. Handbook of Composites, Vol. 2, Structure
and Design. (C.T. Herakovich and Yu.M. Tarnopol’skii eds.) Elsevier Applied Science, pp. 861 14.
Limonov, V.A. and Anderson, J.A. (1991). Effect of stress ratio on the strength of organic plastics. J.
Mech. Composite Mater. 27 (3), 276-283.
Milyutin, G.I., Bulmanis, V.N., Grakova, T.S., Popov, N.S.and Zakrzhevskii, A.M. (1989). Study and
prediction of the strength characteristics of a wound epoxy organic-fiber plastic under different
environmental effects. J. Mech. Composite Mater. 25 (2). 183-189.