臺灣博碩士論文加值系統

顆粒堆積結構影響顆粒複合材料的性質與行為，本研究以Java程式語言撰寫網路運算之二維顆粒堆積模擬程式，依照不同堆積結構共開發四個模擬程式：(1) 二維單一粒徑規則堆積 (2) 二維單一粒徑隨機堆積 (3) 二維單一粒徑隨機緊密堆積 (4) 二維多種粒徑隨機堆積。使用者透過網路瀏覽器直接向伺服器端下載程式至用戶端執行，程式基本輸入之參數為容器尺寸、顆粒尺寸、漿體厚度，輸出結果為堆積結構、堆積密度、空隙率、填塞之顆粒數及圖形化之漿體連通路徑，以電腦模擬顆粒堆積結構可提供視覺化及快速重複試驗之優點，然而演算法決定了模擬程式之正確性與執行速度。
研究結果顯示堆積密度及空隙率在規則堆積時，受容器尺寸與顆粒尺寸之餘數及漿體厚度影響;而在隨機堆積時，堆積密度及空隙率受到顆粒尺寸、漿體厚度、填塞順序、總顆粒數、迴圈執行次數影響。填塞之顆粒數則隨容器尺寸、顆粒尺寸、總顆粒數、迴圈執行次數而變化。

The particle packing structure affects the properties of particulate materials. This study is to simulate the 2-D packing structure by using computer simulation. The four simulation programs were developed to simulate different packing structure: (1) 2-D mono-sized sphere ordered packing; (2) 2-D mono-sized sphere random packing; (3) 2-D mono-sized sphere random close packing; (4) 2-D multi-sized sphere random packing.
The programs were written by Java programming language. The advantage of Java is web-based programming. All of the simulation programs were uploaded to the server. The user can use browser to run the programs on the net. The basic inputs of program are the container size, particle size, and thickness of matrix film. The outputs are packing structure, packing density, porosity, numbers of the specified particle, and connective paths of matrix film.
Computational results show that the remainder of the container size/net length of two particles affects the packing density of ordered packing. For the random packing, the key factors are the particle size distribution, filling order, numbers of iteration and total particles, and thickness of matrix film.

Chinese Abstract……...…………………………………………………..I
English Abstract……………………………………..…………………..II
Table of Contents……..………………………………………………...III
List of Tables…………………..…………………………………………V
List of Figures…………………….…………………………………..VIII
Chapter 1 Introduction……………..……………………………………1
1.1 Motivation……………………………………………………………..1
1.2 Background……………………………………………………………2
1.3 Research highlight…………………………………………………….5
1.4 Research procedure……………………………………………………6
Chapter 2 Review of the Past Works……………………………………8
2.1 Physical characteristics of aggregate………………………………….8
2.2 Packing models of the past works……………………………………..8
2.2.1 Empirical models………………………………………………..9
2.2.2 Analytical models………………………………………………14
2.3 Brief discussions of Java programming………...……………………18
2.3.1 What’s Java…………………………………………………….18
2.3.2 Programming paradigms……………………………………….19
2.3.3 Discussions of Java Applet…………………………………….19
2.3.4 A simple example: Hello Java……………………………….…20
Chapter 3 Implementation of Computer Simulation…………………26
3.1 Mathematical deduction of packing models…………………………26
3.1.1 Two-dimensional mono-sized sphere ordered packing………...26
3.1.2 Two-dimensional mono-sized sphere random packing………...31
3.1.3 Two-dimensional mono-sized sphere random close packing….34
3.1.4 Two-dimensional multi-sized sphere random packing………...37
3.2 Java programming……………………………………………………38
3.2.1 The design structure of program……………………………….39
3.2.2 Program of double circle structure……………………………..39
3.2.2.1 The mono-sized sphere structure……………………….41
3.2.2.2 The multi-sized sphere structure………………………..41
3.2.3 Program of ordered packing……………………………………41
3.2.4 Program of random packing……………………………………42
Chapter 4 Results and Discussions…………………………………….45
4.1 Two-dimensional mono-sized sphere ordered packing………………46
4.2 Two-dimensional mono-sized sphere random packing………………52
4.3 Two-dimensional mono-sized sphere random close packing………..62
4.4 Two-dimensional multi-sized sphere random packing………………72
Chapter 5 Conclusions and Suggestions for Future Studies…………83
5.1 Concluding remarks………………………………………………….83
5.2 Suggestions for future studies………………………………………..85
References……………………………………………………………….87
Appendix A Program of 2-D mono-sized sphere ordered packing…….102
Appendix B Program of 2-D mono-sized sphere random packing…….108
Appendix C Program of 2-D mono-sized sphere random close packing115
Appendix D Program of 2-D multi-sized sphere random packing…….122
Appendix E An alternate method of mixture design:
The aggregate packing method..........................................................139
Acknowledgements
About the Author

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