臺灣博碩士論文加值系統

本研究主要以靜態力學測試、有限元素模擬軟體分析分析以聚乳酸(PLA)為主要材質之生物複合材料薄膜。DIC光學影像分析被用來分析實驗過程的照片，確認試片在拉伸實驗過程中有確實的平均受力，沒有任何歪斜，增加實驗數據的準確性。在靜態力學測試部分，使用拉伸試驗機與自製夾具，對8種不同成分含量之PLA薄膜進行三種不同速度之拉伸-保持實驗，並依據其實驗結果分析拉伸期間的受力、平均應力與平均應變，並計算出平均值與標準差，從中對不同成分與含量的PLA薄膜提出一個初步的比較。最後使用有限元素模擬軟體針對實驗獲得之數據進行模擬並比較與實際數據之間的差別。經過實驗之後，無機矽薄膜所表現出來的成分濃度與機械性質之關係與我們事先估計的情況大略相同，但其在拉伸速度最慢時卻展現出最大受力的情況。僅能先推測無機矽薄膜本身隨著受力次數的增加，可能會逐漸產生硬化的狀況。有機矽薄膜在矽濃度為0.5%時所表現出的機械性質最佳。從與拉伸時間的相互關係來看，可確認其並不會產生與無機矽薄膜類似的情況。 在擬和部分，從比較結果中可以看出模擬數據隨著時間過去，其跟實際數據之誤差也越來越大，推論這跟試片本身隨著實驗逐漸受損有關。使用顯微鏡所觀察到的試片照片上有著許多裂縫，可以認定隨著實驗時間的推進，試片本身的裂縫會隨著受力逐漸增大而跟著被擴大或是增加額外的裂縫，進而影響到後段的實驗結果。

The mechanical properties the bio-composite films which use the PLA (Poly lactic Acid) as the basic materials were studied by using static mechanics test, finite element simulation software in this work. The DIC optically image analysis was using to analyze the pictures which taken during the test to make sure that the films were extend average without any crooked to increase the accuracy of data. In the part of static mechanics test, the tensile testing machine and self-made clamps were used to conduct the ramp-told test of 8 kinds of PLA films which has different kinds of ingredients and content of additives, and calculate the average value and standard deviation by analyze the force, stress and strain according to the test data to make a preliminary comparison for different kinds of PLA films. Then, the finite element simulation software was used to make the simulation to compare with the reality test data. After the test, the relationship between ingredient and mechanical properties of inorganic silicon films is similar to the situation we estimated first, but it has the biggest force at the slowest speed. It can only surmised that the inorganic silicon films may will be hardening gradually after the test. The organic silicon films showed the best mechanical properties at 0.5% of ingredient of silicon. It can be confirmed that the organic silicon films won't produce the similar situation with inorganic silicon films by observed the relationship between ingredient and mechanical properties of organic silicon films. At the part of fitting, the error between the actual data and simulated data was getting bigger as time goes on. It can be confirmed that is related to the broken of films during the test. In the micrograph of films, there are many tiny cracks can be observed. As the result, it can say that the second half of the test may be affected because of the cracks which were getting bigger or extra generated cracks during the test.

摘要 i
Abstract ii
目次 iii
表目錄 v
圖目錄 vi
第一章 緒論 1
1.1 研究背景 1
1.2 研究目的 1
1.3 研究動機 2
1.4 本文架構 2
第二章 文獻回顧與PLA試片簡介 4
2.1 生物材料的添加 4
2.2 PLA薄膜試片之製程與介紹 5
第三章 研究方法 6
3.1 實驗器材 6
3.2 實驗步驟 7
3.3 實驗流程 9
3.4 DIC光學影像分析的驗證 11
3.5 線性黏彈性模型與損傷模型 11
3.5.1 線性黏彈性模型 13
3.5.2 損傷模型 14
第四章 結果與討論 16
4.1 時間分類 16
4.1.1 無機矽試片 16
4.1.1.1 0.3mm/sec 16
4.1.1.2 0.03mm/sec實驗 17
4.1.1.3 0.003mm/sec實驗 18
4.1.2 有機矽試片 19
4.2.1.1 0.3mm/sec實驗 19
4.1.2.2 0.03mm/sec實驗 20
4.1.2.3 0.003mm/sec實驗 21
4.2 種類分類 23
4.2.1 無矽試片 23
4.2.2 無機矽試片 24
4.2.3 有機矽試片 26
4.3 0.3mm/sec實驗與瞬間楊氏係數 28
4.3.1 無機矽試片 28
4.3.2 有機矽試片 29
4.3.3 瞬間楊氏係數變化趨勢 30
4.4 瞬間楊氏係數與鬆弛率 32
4.4.1 無機矽試片 32
4.4.2 有機矽試片 34
4.5 ABAQUS擬和結果與實驗後試片之顯微鏡觀察結果 35
4.5.1 ABAQUS擬和結果 35
4.5.2 顯微鏡觀察結果 35
第五章 結論與未來展望 38
5.1 結論 38
5.2 未來展望 39

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