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題 名 | 周圍濕氣對黏彈性複材於維護過程後熱殘留應力之影響 |
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作 者 | 陳榮盛; 黃肇義; 涂振一; | 書刊名 | 力學 |
卷 期 | 9:1 1993.03[民82.03] |
頁 次 | 頁59-68 |
分類號 | 440.34 |
關鍵詞 | 維護過程; 熱殘留應力; 濕氣; 黏彈性複材; 衰減時間; 轉換因子; Reduced time; Shift facton; Thermal residual stress; |
語 文 | 中文(Chinese) |
中文摘要 | 本文係探討複材在適當維護過程(curing process)後,再經後處理(postcure )之冷卻階段所產生殘留應力。由於複合材料在後維護過程之冷卻階段,除受溫度之影響外 ,在製程後,亦常受周圍環境之影響。因此本文除分析複材在冷卻階段之溫度變化外,並進 一步考慮在冷卻後周圍環境濕氣之影響,以求出使其殘留應力為最小之最佳溫度控制歷程。 在此選用 AS4/3502 之石墨╱樹脂,以對稱正交疊層為例,並進行黏彈分析,對冷卻過程之 溫度及冷卻後濕氣的影響, 可將其材料性質視為其有 HTSM ( Hygrothermorheologically Simple Material )之特性, 再引用變分原理( Calculus of variation )推導在獲得最 小殘留應力之最佳溫度歷程的控制方程式。最後應用數值反覆疊代法求出最佳溫度路徑的分 佈,並預測其殘留應力情形。 |
英文摘要 | This paper analyzes the residual stress of the composite during the cooling process impoed with post cure after the appropriate curing process. Due to the effect of temperature during the cooling process of post cure, the manufacture of composite material is also affected by the environmental humidity after fabrication. For this reason, this paper not only attempts to analyze the temperature effect during the cooling process but also focuses on the effect of humidity after cooling to obtain the optimal temperature path with the minimum residual stress. The material of AS4/3502 graphite/epoxy composite with the regular symmetric cross-ply laminate is adopted as an example, and is involved in the viscoelastic analysis. For the effect of temperature of cooling process in post cure and environmental humidity after fabrication, the mechanical properties of composite material is treated as HTSM (Hygrothermorheologically Simple Material) character, then the calculus of variation is introduced to derive the optimum temperature path with the minimum residual stress. Finally, the iteration of the numerical method is applied to solve such an optimal temperature history and predict the residual stress. |
本系統中英文摘要資訊取自各篇刊載內容。