Fundamental Study on the Mechanical Behavior of Coke as a Material with Rundomly Distributed Pores

Abstract

A miniature bending test method was developed for measuring mechanical properties of coke with better accuracy. Mechanical properties of formed and conventional cokes at room temperature were measured by this method and the effects of pore on them were investigated, taking statistics into consideration. Deformation of a porous body was analysed by the finite element method combined with Monte Carlo method and an attempt was made to develop a method to estimate Young's modulus of coke matrix.
The results are as follows.
1) Linear correlation was found between Young's moduli of cokes and maximum bending stress and a possibility of estimating the strength from the measurements of elastic deformation was shown.
2) Young's modulus of coke decreased with increasing porosity. The decreasing rate of formed coke was different from that of conventional cokes.
3) Young's modulus of coke matrix was estimated by the new method from apparent Young's moduli including the effects of pores.
4) From a new viewpoint a comparison was made between the mechanical properties of formed coke and that of conventional one, using the Young's moduli of coke matrix obtained as above.