臺灣博碩士論文加值系統

溫度與濕度的變化容易影響複合材料，以及複合材料的力學分析與性質.然而在考慮這一類問題時，溫度與濕度兩者間交互作用往往被忽略．事實上任何一種材料皆會吸收濕氣，而影響到內部溫度變化，且溫度變化也會影響材料的濕氣含量，所以溫度與濕度在材料中的交互作用是相當重要的議題．
溫濕效應使複合材料的積層板間產生脫層（Delamination）破壞，此破壞是材料結構強度降低之重要原因之一．若溫濕度有所改變，其預期的結果將無法發揮，而降低其使用壽命，甚至造成破壞，所以探討溫濕度對複合材料的影響是絕對必要的．
本論文選擇T300/5208，AS4/3501-6，即隨機任意方向排列之 （random-oriented）複合層板，在普松比(ν)，楊氏係數（E），剪力模數(G)變異下，取到四十層之層板，由數值模擬得到的實驗結果，求得溫度與濕度函數相關關係，再經統計的分析方法，以"隨機變數"為考慮，所得的理論值和實驗值做一比較，並詳細探討其結果． 再著，本論文題出一套系統的方法比較溫濕度對積層板不同厚度或疊層板變化的影響結果，以作為醫學工程中人造器官及航太工程中，飛行載具等製造材料之設計參考依據．

Temperature Variation and moisture change deeply affect the mechanical behavior of composite plates. However, it is often ignore temperature-moisture interaction when analyzing these laminated composite problems. In fact, for any composite plate, temperature variation may change moisture content, and vice versa. Therefore, the interaction between temperature and moisture in a composite is a research topic:
The temperature-moisture interaction may cause delamination in composite plates, and thus degraded the strength of a composite structure.
In this thesis, an investigation of the coefficients of hygrothermal expansion for a general class of randomly-oriented composite laminate is presented. A simple random statistical analysis has been used to clemonstrate that under certain conditions, for instance, a laminate with 40 plies or more, the mean values of the coefficients of hygrothermal expansion in the randomly-oriented laminate are close to those values evaluated from the classical hygrothermal-elastic lamination theory. The preliminary results from this statistical analysis provide a set of general guidelines for designing the coefficients of hygrothermal expansion of the composite laminates to meet different environmental conditions in engineering applications.
Keyword:Composite, hygrothermal.,temperature variation, moisture change

目 錄
中文摘要
英文摘要
致謝
目錄
圖表目錄
符號說明
第一章 緒論
1-1引言
1-2研究動機、目的
1-3 文獻回顧
第二章 基礎理論
2-1層板理論簡介
2-1-1基礎論
2-1-2 位移場
2-1-3 應變位移關係
2-1-4 應力應變關係式
2-1-5 溫度與濕度效應
第三章 理論分析
3-1 溫濕彈性理論
第四章 結果與討論
4-1材料性能參數
4-2 結果分析
4-3 討論
參考文獻
Table A 材料性能參數
Table B 積層板幾何形狀與疊層示意圖
Table C 材料主軸及幾何座標
附圖表

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