Analysis of survivability of a plate made of a highly porous cellular material under cyclic thermal loading

The problem of manufacturing parts and structures from highly porous cellular materials (HPCMs) to obtain unique physical and mechanical properties and high performance is becoming increasingly important. Using HPCMs is especially important in the manufacture of efficient heat exchangers, filters, catalysts, and structures absorbing various types of energy. In this paper, a technique for forecasting the durability of an HPCM plate under cyclic thermal loading is developed. The technique implies the calculation of survivability within a deterministic framework by using the Paris equation. The finite element software package ANSYS is used to determine the stress intensity factor of a semi-elliptical crack. Experiments were conducted in order to establish physical and mechanical properties of HPCMs needed for the mathematical modeling. The numerical analysis is performed for rolled up and unrolled plates used as walls of an ecological industrial boiler. The results of research show that rolling up a plate increases its durability under thermal loading by a factor of about 1.5.

References

[1] Antsiferov V.N., Khramtsov V.D., Polivoda A.I., Volkov E.P., Tsoi G.A., Bevz A.P. Vysokoporistye pronitsaemye materialy dlia ekologicheski bezopasnykh teplogeneratorov [The highly permeable materials for environmentally friendly heat generators]. Perspektivnye materialy [Journal of Advanced Materials]. 2008, no. 6, pp. 5–10.

[2] Spravochnik po koeffitsientam intensivnosti napriazhenii [Handbook of stress intensity factors]. Ed. Murakami Iu., Moscow, Mir publ., vol. 2, 1990. 1016 p.

[3] Parton V.Z., Morozov E.M. Mekhanika uprugo-plasticheskogo razrusheniia. Ch. 1. Osnovy mekhaniki razrusheniia [Elastoplastic fracture mechanics: pt. 1. Fundamentals of Fracture Mechanics]. Moscow, LKI publ., 2008. 352 p.

[4] Cherepanov G.P. Mekhanika razrusheniia [Fracture mechanics]. Izhevsk, Institut komp’iuternykh issledovanii publ., 2012. 872 p.

[5] Feodos’ev V.I. Soprotivlenie materialov [Strength of materials]. Moscow, Bauman Press, 2001. 591 p.

[6] Bakhvalov N.S., Kornev A.A., Chizhonkov E.V. Chislennye metody. Resheniia zadach i uprazhneniia [Numerical methods. Solving problems and exercises]. Moscow, Drofa publ., 2009. 393 p.

[7] Gusev A.S. Veroiatnostnye metody v mekhanike mashin i konstruktsii [Probabilistic methods in the mechanics of machines and structures]. Moscow, Bauman Press, 2009. 224 p.