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鑄造TC4鈦合金細節(jié)疲勞強度DFRcutoff的研究
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Detail Fatigue Rating Cutoff Values of Casting TC4 Alloy
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    摘要:

    細節(jié)疲勞額定值法(DFR法)是基于概率疲勞的民機結構疲勞可靠性壽命分析方法之一。針對我國鑄造TC4鈦合金疲勞性能數(shù)據(jù)不全而不能滿足新型民用渦扇支線飛機研發(fā)需要的現(xiàn)狀，采用雙點法和單點法對熱等靜壓處理的鑄造TC4鈦合金的細節(jié)疲勞強度截至值DFRcutoff進行了對比研究。結果表明：雙點法所測DFRcutoff=375.83 MPa，單點法所測DFRcutoff=387.30 MPa，兩者之間的相對誤差小于3.1%，試驗結果準確可靠，可為新型渦扇支線飛機選材、疲勞設計和壽命評估以及民用飛機適航審查提供數(shù)據(jù)支持

    Abstract:

    The detail fatigue rating (DFR) valued method is one of the design and prediction methods for fatigue reliability life based on probability fatigue for civil aircrafts. The casting TC4 alloy could not meet the development need for new-type civil turbofan regional aircraft owing to the data deficiency of its fatigue properties. So that the DFRcutoff values of casting TC4 alloy were measured and calculated by double-dot and single dot method, respectively, in this study. The results indicate that the DFRcutoff values are 375.83 MPa by the double-dot method and 387.30 MPa by the single dot method with a relative error lower than 3.1% between them. These test results were accurate and reliable, and can be used to select suitable materials from the fatigue strength design and fatigue life evaluation of the components for new-type turbofan aircraft and the navigability inspection of the civil aircraft

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要玉宏,劉江南,馬 麗,上官曉峰,陳迎旭,魏建鋒.鑄造TC4鈦合金細節(jié)疲勞強度DFRcutoff的研究[J].稀有金屬材料與工程,2009,38(9):1530~1532.[Yao Yuhong, Liu Jiangnan, Ma Li, Shangguan Xiaofeng, Chen Yingxu, Wei Jianfeng. Detail Fatigue Rating Cutoff Values of Casting TC4 Alloy[J]. Rare Metal Materials and Engineering,2009,38(9):1530~1532.]
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  • 收稿日期:2008-09-15
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