Study on the Thermal Cracking Processes of Composite Subjected to Thermal Loading

Abstract:

A numerical method RFPA-T (Thermal Induced Rock Failure Process Analysis) code is used to study the thermal cracking processes of quasi-brittle materials subjected to high or low temperature. The numerical results indicate that thermal stress concentrating along the interface between the matrix and the embedded grains due to their different coefficient of thermal expansion (CTE). The modeling results indicate that θ-crack is generated during temperature increment as the CTE of the embedded grain is smaller than that of the matrix. However, radial-cracks emerged when the temperature decrease. The results obtained from RFPA-T code show a good agreement with experimental evidence of crack patterns caused by thermal expansion mismatch.

• Periodical: Applied Mechanics and Materials (Volumes 256-259)
• Pages: 2867-2870
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.256-259.2867
• Online since: December 2012
• Authors: Shi Bin Tang, Zheng Zhao Liang, Ya Fang Zhang
• Keywords: Crack Growth, Heterogeneity, Numerical Modeling, Thermal Mismatch Stress

References

[1] Z.P. Bažant, M.F. Kaplan: Concrete at high temperatures-Material properties and mathematical models (Longman, Harlow 1996).

[2] J.C. Barnner: Bull. Geol. Soc. of Am. VII. 7 (1896), pp.255-314.

[3] W.H. Johnson, W.H. Parsons: Journal of Research of the U.S. National Bureau of Standards Vol. 32 (1944), pp.101-126.

[4] G.P. Merrill: A treatise on rocks-Rock Weathering and soils (Macmillan, London 1906).

[5] R.J. Schaffer: Building Research Special Report Vol. 18 (1932), p.149.

[6] J.N. Rossettos, X. Shen: Composites Science and Technology Vol. 54 (1995), pp.417-422.

[7] T.C. Lu, J. Yang, Z. Suo, A.G. Evans, R. Hecht, R. Mehrabian: Acta Metall. Mater. Vol. 39 (1991), pp.1883-1890.

[8] E.S Folias, M. Hohn, T. Nicholas: International Journal of Fracture Vol. 93 (1998), pp.335-349.