Abstract: In this paper,based on linear creep assumption,(1) tWo theorems about creepcoefficient C(t)and relaxation coefficient K_p(t,)are dirived, i.e.if the time, the creep coefficient and relaxation coefficient satisfy the following equations:(2)the recurrence formula of solving the relaxation coefficient K_p(t,)directly from thecreep coefficient C(t)is presented;(3)the general recurrence formulas of initial strainmethod and initial stress method for any kinds of expressions of C(t,)and K_P(t, )aredirived,they can...