Abstract: Under constant uniaxial tensile load continuous damage parameter for non-ageing brittle materials may be expressed as ω(P/A₀)=g(P/A₀)+f₁(P/A₀)f₂t The determination of the expression for g(P/A₀) had been pointed out by [4]. But how to determine the expressions for f₁(P/A₀) and f₂(t), the solution to this problem is not yet in sight. Now the solution to this problem is given by the present paper. This paper points out f₁(P/A₀) f₂(t) = <t>(P/A₀) t and the method of the determination of the expression for (P/A₀).

Key words: random walk, water exchange, numerical simulation, Markov chain, advection-diffusion