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研究生:楊書豪
研究生(外文):Shu-HaoYang
論文名稱:鋁合金三明治蜂巢結構之衝擊動態響應分析
論文名稱(外文):Dynamic Impact Analysis of Honeycomb Sandwich Structures Made of Aluminum Alloy
指導教授:胡宣德
指導教授(外文):Hsuan-Teh Hu
學位類別:碩士
校院名稱:國立成功大學
系所名稱:土木工程學系碩博士班
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:中文
論文頁數:203
中文關鍵詞:三明治蜂巢結構爆炸荷載衝擊行為ABAQUS
外文關鍵詞:Honeycomb sandwich structuresExplosive loadsImpact loadsABAQUS
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面對軍事攻擊與恐怖攻擊之威脅,對於結構物之抗衝擊與抗爆震之能力提升為目前之研究重點,而國內現今對於蜂巢結構之研究,主要發展於靜態行為之研究,本研究提供動態力學之研究模型,以探討蜂巢結構受到子彈衝擊及爆炸壓力作用下之破壞模式。
由於三明治結構之有限元素模擬分析,以往的研究方式將結構部分都考慮為完美接合,這樣的考慮方式所求得之蜂巢強度較實際值高,因此本研究將利用有限元素軟體ABAQUS建立完整蜂巢結構模型,去描述三明治結構之脫層現象,利用此方式所模擬出之結果較符合真實狀況。
藉由模擬在三明治蜂巢結構實驗架構下,驗證有限元素分析與實驗之差別,並據此分析模型研究蜂巢結構之幾何參數對於抗衝擊性能之影響,以瞭解鋁合金蜂巢結構板之動態響應。
針對不同形狀之蜂巢結構,在具有相同相對密度的情況下,方型蜂巢結構所呈現之吸能與抗撞能力均為最佳,而孔徑大小對於蜂巢結構之影響,由分析結果而言,孔徑較小之蜂巢結構能夠提供較佳的吸能效果,而且以方型蜂巢結構所成長之比例最高,由此可知對於蜂巢結構而言,使用正方型蜂巢結構所展現的能力最好。
Faced with the threat of military and terrorist attacks, it is increasingly necessary and in fact required to make a great progress in the strength of structures. Nowadays, the study of the honeycomb sandwich structure focus on the static mechanics. In this study will use the nonlinear finite element software ABAQUS to build a dynamic model of the honeycomb sandwich structure.
To simulate the sandwich structures using the FEM had thought about perfect bonded in the past. However, in this way to simulate the model will high estimate the strength of the sandwich structure. In order to fit the real situation, the analysis of delamination and fracture must be considered in ABAQUS to build a complete model.
The result of the FEM analysis will compare with the experiment of the sandwich structure to test and verify. Accordingly the geometric parameters of the honeycomb structure analysis model for the effect of the impact resistance to understand the dynamic response of aluminum honeycomb structures.
For different shapes of the honeycomb structure in the case with the same relative density, the square honeycomb structure showing the energy absorption and anti-collision capabilities are the best. For the effect of pore size, the results show that pore size of the honeycomb structure smaller can provide better energy absorption.
摘要 i
ABSTRACT ii
誌謝 iii
目錄 iv
圖目錄 viii
表錄 xiv
符號說明 xvi
第1章 緒論 1
1.1 研究動機 1
1.2 文獻回顧 3
1.2.1 蜂巢結構機械性質 3
1.2.2 蜂巢結構之靜態與動態行為實驗 4
1.2.3 有限元素法應用於蜂巢結構板之分析 5
1.3 研究方法與目的 10
1.4 論文架構 10
第2章 三明治蜂巢結構之介紹 11
2.1 蜂巢材料之介紹 11
2.1.1 多孔細胞型材料(cellular materials) 11
2.1.2 三明治蜂巢結構之幾何架構 13
2.1.3 蜂巢結構之特性[33] 15
2.1.4 蜂巢結構之製造[34] 17
2.1.5 蜂巢結構之種類 18
2.2 蜂巢結構之機械性質 20
2.2.1 蜂巢材料之相對密度 20
2.2.2 蜂巢結構之機械性質 26
第3章 衝擊與爆炸壓力波效應作用之損傷反應 33
3.1 衝擊現象之分類與影響 33
3.2 爆炸壓力波之理論與經驗公式 34
3.2.1 爆炸壓力波之傳遞 34
3.2.2 爆炸壓力波之經驗公式 37
3.2.3 爆炸壓力波之數值模擬 42
3.3 材料損傷參數之定義[45] 44
3.3.1 韌性損傷 45
3.3.2 剪切損傷 46
3.3.3 MSFLD損傷 50
3.3.4 ABAQUS材料損傷參數 51
第4章 鋁合金三明治蜂巢結構靜態與動態衝擊試驗 54
4.1 試驗目的 54
4.2 試驗儀器設備 54
4.2.1 MTS819高速動態試驗機 54
4.2.2 高精度雷射位移感測器 56
4.2.3 資料擷取系統 56
4.3 實驗試體與材料 57
4.3.1 衝擊彈頭 57
4.3.2 鋁合金蜂巢板 57
4.4 試驗配置與操作流程 58
4.4.1 應變計黏貼流程 58
4.4.2 實驗配置 59
4.4.3 試驗資料輸入設定 61
4.4.4 試體名稱設定 61
4.4.5 操作流程 62
4.4.6 試驗注意事項 62
4.5 試驗數據之動態響應討論 64
4.5.1 線性濾波器的基本介紹[50, 51] 64
4.5.2 孔徑3mm試體在不同速度作用下之動態響應 76
4.5.3 孔徑3mm試體在不同彈頭型式作用下之動態響應 81
4.5.4 不同孔徑試體在相同彈頭作用下之動態響應 87
4.5.5 結論 91
第5章 三明治蜂巢結構面外之動態衝擊模擬分析 93
5.1 有限元素分析 93
5.1.1 衝擊現象之有限元素分析理論 94
5.1.2 ABAQUS隱式求解器 94
5.1.3 ABAQUS顯式求解器 96
5.1.4 顯式與隱式求解器之比較 98
5.2 鋁合金三明治蜂巢結構試驗模型 99
5.2.1 材料參數之設定 99
5.2.2 模型幾何設定 100
5.2.3 接觸條件設定 103
5.2.4 試驗結果與模擬之驗證 113
5.3 不同蜂巢形式於衝擊載重作用之動態模擬分析 116
5.3.1 子彈衝擊作用下之動態響應 116
5.3.2 爆炸荷載作用下之動態響應 135
5.3.3 三明治蜂巢結構破壞模式 147
5.4 結論 153
第6章 結論與建議 154
6.1 結論 154
6.2 未來研究之方向與建議 155
參考文獻 157
附錄 161
ABAQUS INPUT FILE 161
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