| ESTIMATION OF FATIGUE LIFE UNDER RANDOM LOADING WITH PLASTIC HYSTERESIS ENERGY THEOREM |
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| 引用本文： | Wu Fumin(Northwestern Polytechnical University,Xi''''an,China,710072)ian Dingshuan(Chinese Flitrht Test Establishment,Xi''''an,China,710089). ESTIMATION OF FATIGUE LIFE UNDER RANDOM LOADING WITH PLASTIC HYSTERESIS ENERGY THEOREM[J]. 中国航空学报, 1994, 0(4) |
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| 作者姓名： | Wu Fumin(Northwestern Polytechnical University Xi''''an China 710072)ian Dingshuan(Chinese Flitrht Test Establishment Xi''''an China 710089) |
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| 作者单位： | Wu Fumin(Northwestern Polytechnical University，Xi'an，China，710072)ian Dingshuan(Chinese Flitrht Test Establishment，Xi'an，China，710089) |
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| 摘 要： | ＥＳＴＩＭＡＴＩＯＮＯＦＦＡＴＩＧＵＥＬＩＦＥＵＮＤＥＲＲＡＮＤＯＭＬＯＡＤＩＮＧＷＩＴＨＰＬＡＳＴＩＣＨＹＳＴＥＲＥＳＩＳＥＮＥＲＧＹＴＨＥＯＲＥＭＷｕＦｕｍｉｎ（ＮｏｒｔｈｗｅｓｔｅｒｎＰｏｌｙｔｅｃｈｎｉｃａｌＵｎｉｖｅｒｓｉｔｙ，Ｘｉ＇ａｎ，...
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ESTIMATION OF FATIGUE LIFE UNDERRANDOM LOADING WITH PLASTICHYSTERESIS ENERGY THEOREM |
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| Wu Fumin. ESTIMATION OF FATIGUE LIFE UNDERRANDOM LOADING WITH PLASTICHYSTERESIS ENERGY THEOREM[J]. Chinese Journal of Aeronautics, 1994, 0(4) |
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| Authors: | Wu Fumin |
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| Abstract: | Fatigue damage of materials includes static damage and cyclic damage.Static damage is a ratio of the plastic energy in first static loading to the statictoughness, while cyclic damage is the ratio of the cyclic plastic hysteresis energy to thefatigue toughness. In the calculation, cyclic hardening (or softening) of a material istaken into account, which results in the increase (or decrease) of the yield stress. Forsimplification, it is assumed that stress and strain in cyclic loading vary in accordancewith the hysteresis loop. Fatigue toughness of a material can be detennined bysymmetric cyclic stress controlled fatigue test. A method, rational and convenient forengineering, is proposed to estimate the fatigue life under random loading based onplastic hysteresis energy theorem. Preliminary verification by test is satisfactory. |
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| Keywords: | plastic deforniation static characteristics fatigue tests fatigue life random loads |
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