Abstract
Polymer concrete should be considered as material composed of two media; the polymer mortar and the grains. The existence of interphase cracks between the polymer mortar and the grains (the components of the material) is assumed. Experimental tests were carried out using DCB with specimens of the polymer concrete, composed of two media; polymer mortar and the grains. The critical value of the J-integral (the strain energy release rate G) was determined from load-displacement curve obtained using an X-Y plotter. The stress intensity factors KJc were determined by applying the Irwin method and photoelastic measurement results. The displacements and the stresses were also determined by applying strain gauges. Since an analytical solution for this problem is not available the distribution of stresses and displacements has been calculated using the finite element method.
The crack initiation always occurs in the interface region between the components of the specimens. Using the critical values of the strain energy release rate Gc and the ultimate strength of the polymer concrete (obtained experimentally) and after calculation of Young’s modulus (applying a double phase compound material law), the lengths of interphase cracks ‘a’ can be determined. After examination of the fracture of the specimens failed under tension the existence of interphase cracks has been confirmed with their lengths range agreeing with values calculated above.
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References
Sneddon, I. N., The Use of Integral Transforms. McGraw-Hill, New York, 1972.
Williams, M. L., The stresses around a fault or crack in dissimilar media. Bull. Seismol Soc. Amer., 49 (1959) 199–204.
Rice, J. R. and Sih, G. C., Plane problem of crack in dissimilar media. J. Appl. Mech., E32 (1965) 418–23.
Clements, D. L., A crack between dissimilar anisotropic media. Int. J. Engng Sci., 9 (1971) 257–65.
Willis, J. R., Fracture mechanics of interfacial cracks. J. Mech. Phys. Solids, 19 (1971) 353–68.
Piva, A. and Viola, E., Biaxial load effects on a crack between dissimilar media. Nota Tecnica n.35.1979, Istituto di Scienza delle Costruzioni, University of Bolonia, Italy.
Szmelter, J., The Finite Element Method Programs (in Polish). Arkady, Warszawa, 1973.
Brandt, A. M., Influence of the fibre orientation on the energy absorption at fracture of SFRC specimens. In Brittle Matrix Composites 1, ed. A. M. Brandt and I. H. Marshall. Elsevier Applied Science Publishers, London, 1986, pp. 403–20.
Irwin, G. R., Dally, J. W., Kobayashi, T., Fourney, W. L., Etheridge, M. J. and Rossmanith, H. P., On the determination of the a-K relationship for birefringent polymers. Exp. Mech., 19(4) (1979) 121–8.
Irwin, G. R., The dynamic stress distribution surrounding a running crack—a photoelastic analysis. Proc. SESA, 16(1) (1958) 92–6.
Zienkiewicz, O. C., The Finite Element Method in Engineering Science. McGraw-Hill, London, 1971.
Sih, G. C. and Liebowitz, H., Mathematical Theories of Brittle Fracture in Fracture, Vol. II, Academic Press, New York and London, 1968, pp. 67–190.
Czarnecki, L. and Lach, V., Structure and fracture in polymer concretes: some phenomenological approaches. In Brittle Matrix Composites 1. ed. A. M. Brandt and I. M. Marshall, Elsevier Applied Science Publishers, London, pp. 241–61.
Jaroniek, M. and Niezgodziński, T., Studies of fracture and the crack propagation in the concrete and the polymer concrete. In Brittle Matrix Composites l. ed. A. M. Brandt and I. M. Marshall, Elsevier Applied Science Publishers, London, pp. 355–70.
Holliday, L., Composite Materials, Elsevier, Amsterdam, 1966, p. 540.
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© 1989 Elsevier Science Publishers Ltd
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Jaroniek, M. (1989). Existence of Interphase Cracks in Polymer Concrete. In: Marshall, I.H. (eds) Composite Structures 5. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1125-3_48
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DOI: https://doi.org/10.1007/978-94-009-1125-3_48
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