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基于疲勞強度衰減模型的S-N曲線測定方法
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    摘要:

    基于經(jīng)驗的疲勞強度衰減模型,提出了一種測定材料和結(jié)構(gòu)的S-N曲線簡易方法,同時可以確定材料和結(jié)構(gòu)的臨界載荷。該方法通過單點應(yīng)力下的疲勞試驗和靜強度測定,可以獲得原來至少需要兩級應(yīng)力試驗才能得到的材料和結(jié)構(gòu)的疲勞曲線。用不同材料的疲勞試驗進行了S-N曲線測定和驗證,結(jié)果表明,該方法能夠準(zhǔn)確而且快捷地測定S-N曲線和臨界載荷,減少了疲勞試驗費用和試驗工作量。

    Abstract:

    A simple method for measuring S-N curve and fatigue limit of a material or a machine part was detailed by a experiential fatigue strength decreasing model in this paper. According to experimental fatigue life of one point stress and static strength, the S-N curve of a material or a machine part was calculated by fatigue strength decreasing model. This new measurement method was validated with different kinds of parts. Upon strength decreasing model, the S-N curve and critical load of two materials were acquired with much less samples than before. The results showed that fatigue strength decreasing model and S-N curve measurement method were feasible and usable.

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盧曦,鄭松林,褚超美.基于疲勞強度衰減模型的S-N曲線測定方法[J].農(nóng)業(yè)機械學(xué)報,2007,38(7):152-155.[J]. Transactions of the Chinese Society for Agricultural Machinery,2007,38(7):152-155.

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