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熱空氣老化對汽車懸置用NR疲勞的影響研究

作者：王偉健，等

中國分類號：TQ332

文獻標識碼：B

文章標識碼：1009-797X(2024)10-0018-05

關鍵詞：天然橡膠；熱空氣老化；拉伸疲勞

 附件下載  在線閱讀

摘要

以某汽車懸置用NR硫化膠為研究對象。分別研究了90 ℃、100 ℃、110 ℃條件下200 h的熱空氣老化對7個不同拉伸倍數（1.6、1.8、2.0、2.2、2.4、2.6、2.8）的單軸動態拉伸疲勞次數的影響。通過試驗研究發現：NR的疲勞次數隨著熱老化溫度的升高呈現明顯的下降趨勢，但1.6拉伸倍數不同溫度下，疲勞次數保持率均≥80%。溫度為110 ℃或拉伸倍數≥2.4則出現急劇下降。

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