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力学学报  1994 

TWO THEOREMS ON LINEAR CREEP PROBLEMS AND THEIR APPLICATIONS
线性徐变问题的两个定理及对计算方法的简化

Keywords: creep,relaxation coefficient,initial strain method,initial stress method,linearcreep problem
徐变度,松弛系数,初应变法,初应力法,线性徐变问题

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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 simplify the calculating methods,and avoid the storages of strain andstress history.

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