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.
Keywords
- Stress Intensity Factor
- Ultimate Strength
- Strain Energy Release Rate
- Double Cantilever Beam
- Critical Stress Intensity Factor
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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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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