臺灣博碩士論文加值系統

本研究主要目標是以鈦合金(Ti6Al4V)材料建立有限元素模型，以更高的效率以及精確度量身打造適合病患的人工頭蓋骨，使用此材料原因為其優異的生物相容性和機械性能，運用選擇性雷射熔化(SLM)製程技術結合有限元素分析(FEA)，於頭蓋骨修補手術提供醫生與病患更加準確的列印成品。在實驗方面，利用 MTS 液壓伺服測試系統與 Instron 9450 落槌衝擊試驗機對積層製造的材料進行測試，在不同的應變率條件下取得應力-應變曲線(Stress-Strain Curve)，擬合出 Johnson-Cook 材料模型係數，最後進行圓形試片的衝擊，模擬病患於術後可能遭受到的二次損傷，通過改變 SLM製程技術的列印參數，研發適用的吸能結構設計，用以提升植入物在人體中的吸能效果，並通過建立有限元素分析模型進行驗證與預測完整的3D列印鈦合金頭蓋骨性能。

The objective of this research is to develop a finite element model utilizing titanium alloy (Ti6Al4V) for crafting patient-specific artificial cranial implants with enhanced efficiency and accuracy, chosen for its exceptional biocompatibility and mechanical properties. The study employs Selective Laser Melting (SLM) combined with Finite Element Analysis (FEA) to offer more precise implant printing for cranial repair surgeries. Through experimental testing with an MTS hydraulic servo system and Instron 9450 drop-weight impact tester,
we obtained stress-strain curves under various strain rates to calibrate the Johnson-Cook material model coefficients. The research also focused on the impact resistance of circular Gs to assess potential secondary damages postsurgery. By modifying SLM process parameters, we aimed to develop an optimized energy-absorbing structure, enhancing the implant's energy absorption within the human body. The established finite element model allows for the verification and prediction of the 3D-printed titanium cranial implant's performance, offering significant improvements in surgical outcomes.

摘要 i
Abstract
目錄 iii
圖目錄 vi
表目錄 xv

第一章 緒論 1
1.1 研究動機 1
1.2 研究目的 5
1.3 文獻回顧 5
1.3.1 人工頭蓋骨植入物的設計探討 6
1.3.2 Johnson-Cook 材料模型探討 16
1.3.3 材料衝擊吸能行為探討 22
1.4 研究方法與流程 32

第二章 基本理論 33
2.1 Johnson-Cook 材料模型理論 33

第三章 拉伸實驗 38
3.1 準靜態拉伸實驗 38
3.1.1 實驗架設 40

第三章 拉伸實驗 38
3.1 準靜態拉伸實驗 38
3.1.1 實驗架設 40
3.1.2 實驗製備 42
3.1.3 實驗結果討論 46
3.2 落槌式反向衝擊拉伸實驗 56
3.2.1 實驗架設 58
3.2.2 實驗製備 61
3.2.3 實驗結果討論 63

第四章 落槌式衝擊實驗 75
4.1 落槌式衝擊實驗 75
4.2 實驗架設 77
4.3 實驗製備 79
4.4 實驗結果與數值模擬驗證 92
4.4.1 衝擊結果討論 92
4.4.2 有限元素模擬分析驗證 100

第五章 鈦合金頭蓋骨有限元素模擬預測 114
5.1 人工頭蓋骨之模型建立 114
5.2 人工頭蓋骨之有限元素模擬分析 123
5.2.1 靜態分析 123
5.2.2 動態分析 126

第六章 結論與未來展望 134
6.1 結論 134
6.2 未來展望 136

參考文獻 137

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