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題 名 | 以殘餘勁度為基礎之熱塑性複合材料疲勞可靠度分析=Fatigue Reliability Analysis of Composites Based on Residual Stiffness |
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作 者 | 胡凡勳; 鄭合志; | 書刊名 | 南亞學報 |
卷 期 | 24 2004.08[民93.08] |
頁 次 | 頁29-42 |
分類號 | 440.34 |
關鍵詞 | 複合材料; 殘餘勁度遞減模式; 可靠度; Composite; Residual stiffness degradation model; Reliability; |
語 文 | 中文(Chinese) |
中文摘要 | 本文係針對熱塑性複合材料-碳纖維強化聚醚醚酮Gr/PEEK [0/45/90/-45] 2s擬均向性積層板在不同負荷條件下之疲勞可靠度作一研究。在實驗方面,本文依序對複材積層板試片進行拉伸試驗與常振幅負荷、兩階段負荷、三階段負荷、隨機負荷等疲勞試驗。在理論方面,則首先探討Gr/PEEK在常振幅負荷下之殘餘勁度遞減特性,並以之為基礎,應用機率與統計之理論來發展多階段疲勞負荷與隨機負荷下之複材疲勞損傷機率模式,藉以預估複材積層板在各種負荷條件下之疲勞可靠度。經過理論與實驗之相互驗證,我們發現若將複材之靜態強度、疲勞壽命、殘餘勁度等各項材料性質視為Weibull分佈時,本文所導出之複材疲勞可靠度評估模式在常振幅負荷、多階段負荷與隨機負荷等不同負荷條件下,均可充分地預估複合材料之疲勞可靠度。 |
英文摘要 | The fatigue reliability of Gr/PEEK composites has been investigated in the present study. As for the experimental investigation, constant amplitude loading, multiple-level loading and random loading have been considered step by step during the fatigue tests. In particular, a residual stiffness degradation model was presented for predicting the fatigue life of composites subjected to constant amplitude fatigue loading. Based on the residual stiffness degradation model, the accumulation of fatigue damage was determined. The residual stiffness distribution after an arbitrary fatigue cycle can be represented by two parameters Weibull distribution function. A fatigue reliability analysis method for arbitrary load history was developed through the Weibull distribution function. Good correlation between theory and experiment was obtained for the constant amplitude loading, two-level loading, three-level loading and random loading. The result of the present study can be used as a basis for the reliability design of mechanical components made of Gr/PEEK composites. |
本系統中英文摘要資訊取自各篇刊載內容。