在不变的拉伸载荷作用下非老化材料连续损伤参数表示式的确定
Determination of Expression of Continuous Damage Parameter for Non-Ageing Materials Under Constant Tensije Load
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摘要: 在不变的拉伸截荷P作用下,非老化脆性材料连续损伤参数可表示为w(P/A0)=g(P/A0)+f1(P/A0)f2(t)其中g(P/A0)表示式的确定方法已由[4]指出了,而f1(P/A0)和f2(t)表示式的确定方法迄今没有人给出过。现在本文解决了这个问题,本文指出,f1(P/A0)f2(t)=φ(P/A0)t,并且给出了确定φ(P/A0)表示式的具体方法。Abstract: Under constant uniazial tensile load continuous damage parameter for non-ageing brittle materials may be ezpressed asw(P/A0)=g(P/A0)+f1(P/A0)f2(t)The determination of the expression for g(P/A0)had been pointed out by[4].Hut 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)=φ(P/A0)t and the method of the determination of the expression for φ(P/A0).
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[1] Kachanov, L, M On failure time under conditions of creep, (in Russian) Izv, Akod,Nauk SSSR, 8 (1958), 26-31. [2] Odqvist, F, K, G, and J, Hult, Some aspect of creep rupture, Arkiv for Fysik.,19,4 (1961), 379-382. [3] Broberg, H A new criterion for brittle creep rupture, T, Appl, Merh.,41(1974),809-811. [4] Piechnik, S.and H.Pachla, Law. of continuous damage parameter for non-ageing materials, Engng Fracture Mech.,12, 2 (1979), 199-209. [5] Cheng Yuan-sheng, A review on the law of continuous damage parameter for non-ageing materials, Engng Fracture Mech.,17, 3 (1983), 211-217. -
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