腹部主動脈瘤常見於高危險群血管疾病患者，由於血管瘤大多均無症狀，往往因動脈血管管壁病變彈性疲乏，血管向外膨脹隆起後突然破裂，病患可能因突發性大出血而死亡。本研究利用現有力學分析方法分析黏彈材料之變形，從平面薄膜膨脹變化，再到立體中空管柱模型膨脹變化，最後可應用至腹主動脈瘤模型上作為醫生手術前之模擬，而材質均選用PDMS黏彈性材料。在量測方法上，使用數位影像分析量測系統，屬於非接觸式表面形變量測技術，觀察不同厚度之薄膜與管柱模型之膨脹變形量、應變、剪力…等，結合CCD(Charge-Coupled Device)影像捕捉與DIC(Digital Image Correlation)演算法，使得3D表面形變的量測能在最快時間內完成。而我們會使用簽字筆或壓克力顏料搭配模板在PDMS表面上做標記，相機拍攝擷取相片後透過Python與Matlab程式語言進行影像分析並觀察分析結果，透過ANSYS流固耦合分析軟體進行實驗結果之驗證。
本研究之製程中將透過薄膜模具設計、管柱模型內外模具設計、利用熔融擠製型3D列印機製作出內外模具、蒸氣表面拋光及後處理、彈性材料之澆注及脫模技術，最後製作出可控制不同厚度的PDMS模型。從實驗結果得知，第一組實驗為製作三種不同厚度之PDMS薄膜，分別為1 mm、1.5 mm 與 2 mm，透過沉水馬達將水灌入流道內使薄膜膨脹，相機拍攝擷取影像分析結果並搭配分析軟體驗證實驗結果之準確度。在流量300 L/H實驗與模擬結果，大約落在0.2 mm以內，因設定流量較小，薄膜經水流過後晃動情形也較小，因此實驗與模擬結果差值較小。而越薄之PDMS灌入1000 L/H之流量實驗與模擬結果差值較大，大約落在0.5 mm左右，因PDMS為黏彈性材料，灌入水時會有不穩定情形之發生。
接著第二組實驗為製作一均質厚度之PDMS管柱模型，在壁厚1.5 mm之模型灌入水之流量1000 L/H，使用方格角點判斷位移方式，Y方向之變形量與模擬結果數值相差較大，因PDMS本身在實驗過程中無法將中間固定，只能在兩端用固定架方式固定，會因重力問題導致下沉現象發生。在壁厚2 mm之模型灌入水之流量1000 L/H，使用方格角點判斷位移方式，在X方向與Y方向之變形量與模擬結果數值相差較大，因PDMS本身材質較厚，在沉水馬達灌入水之最大流量時，管柱模型膨脹並不明顯，因此在擷取影像分析結果時較難點取變形前後之角點位置。因實驗過程中，灌水進入流道或管中皆會有振動問題，目前無法解決，因此結果數值皆為參考。

Abdominal aortic aneurysms are common in patients with high-risk groups of vascular diseases. Since most hemangiomas are asymptomatic, they are often caused by the elasticity of the arterial vessel wall and the sudden rupture of the vessel after expansion and bulge. The patient may die due to sudden heavy bleeding. . This study uses the existing mechanical analysis methods to analyze the deformation of viscoelastic materials, from the expansion of the flat membrane to the expansion of the three-dimensional hollow tubular model, and finally can be applied to the abdominal aortic aneurysm model as a simulation before the doctor's operation, and the material All use PDMS viscoelastic materials. In the measurement method, the digital image analysis and measurement system is a non-contact surface deformation measurement technology to observe the expansion deformation, strain, shear force, etc. of the film and pipe string models of different thicknesses, combined with CCD (Charge Coupled Device) image capture and DIC (Digital Image Correlation) algorithms enable the measurement of 3D surface deformation to be completed in the fastest time. We will use a signature pen or acrylic paint with a template to mark on the PDMS surface. After the camera captures the photo, we will use Python and Matlab programming language to analyze the image and observe the analysis results, and use the ANSYS fluid-structure coupling analysis software to perform the experimental results. The verification.
In the process of this research, the final production will be made through film mold design, pipe string model inner and outer mold design, melt extrusion type 3D printing mechanism to make inner and outer molds, steam surface polishing and post-treatment, and elastic material casting and demoulding technology. A PDMS model that can control different thicknesses. According to the experimental results, the first set of experiments was to make three different thicknesses of PDMS film, 1 mm, 1.5 mm and 2 mm, respectively. Water was poured into the flow channel through a submerged motor to expand the film. The camera captured the image for analysis. The results are combined with analysis software to verify the accuracy of the experimental results. The experimental and simulation results at a flow rate of 300 L/H are approximately within 0.2 mm. Because the set flow rate is small, the sloshing of the film after water flows is also small, so the difference between the experimental and simulation results is small. The difference between the flow rate experiment and simulation results of the thinner PDMS poured into 1000 L/H is larger, which is about 0.5 mm. Because PDMS is a viscoelastic material, there will be instability when poured into water.
Then the second set of experiments is to make a PDMS pipe string model with a uniform thickness. The model with a wall thickness of 1.5 mm is filled with water at a flow rate of 1000 L/H. The corner points of the grid are used to determine the displacement method, the deformation in the Y direction and the simulation result value. The difference is large, because the PDMS itself cannot fix the middle during the experiment, it can only be fixed with a fixing frame at both ends, which will cause sinking due to gravity problems. In the model with a wall thickness of 2 mm, the water flow rate is 1000 L/H, and the displacement method is judged by the corner points of the grid. The deformation amount in the X direction and the Y direction differs greatly from the simulation result value. Because the PDMS itself is thicker, When the maximum flow rate of the submerged motor is poured into the water, the expansion of the pipe string model is not obvious. Therefore, it is difficult to obtain the position of the corner points before and after the deformation when capturing the image analysis results. During the experiment, there will be vibration problems when irrigation water enters the flow channel or pipe, which cannot be solved at present, so the result values are for reference.

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