|
碩士論文公告區 |
||
| 年度： | 95 | |
| 姓名： | 廖宇淵(Yu-Yuan Liao) | |
| 論文題目(中)： | 建築物版狀元件的紅外線檢測與數值分析 | |
| 論文題目(英)： | Inspection of Plate and Layered Structures of Building using Infrared Thermography and Numerical Analysis | |
| 摘要(中)： | ||
| 本研究主要以紅外線非破壞檢測法偵測CFRP施工時所產生的缺陷，進ㄧ步探討缺陷對溫度的影響。紅外線熱影像儀對於偵測薄殼版狀結構為最適合的工具，特別運用在大面積、大尺寸、工程上具有危險的區域及軟質的薄殼複合材料上。其為一種非接觸的量測方法，檢測上具有快速、經濟、安全的優點。 紅外線熱影像法結合接觸式溫度量測程序，用於檢測混凝土黏貼CFRP時缺陷氣泡產生在不同層數時的情形。本研究以採主動式加熱法，於實驗室中利用暫態熱源(鹵素燈及高功率閃光燈)等人造熱源，設法加強材料與周圍環境的溫度對比，將實驗測得實驗值，再以有限元素軟體ANSYS來分析，判別缺陷出現的時間。研究結果得知，缺陷深度會影響在紅外線熱影像上出現及結束的時間，藉由表面溫差曲線來辨別，故從表面溫差上可得知最大溫差發生的時間會隨著缺陷的深淺提早或延後。比較實際實驗及二維有限元素分析結果間之異同處，歸納紅外線熱影像法檢測CFRP缺陷深度最佳檢測時間之參考。 |
||
| 摘要(英)： | ||
| Infrared thermography is non-contact and thus suitable for inspecting subsurface defects of concrete plates and layered structures. The objective of the current research is to apply infrared thermography to inspect the interface de-lamination of carbon fiber-reinforced polymer (CFRP) sheets bonded to concrete substrates. Active sources including halogen lamp arrays and high-power flash had been applied to quickly heat the CFRP surfaces before the infrared camera started to record surface images. The air gaps between CFRP layers and those between CFRP and concrete slowed the heat flux and appeared as hot spots in the thermal images. Finite element models were constructed and different boundaries were simulated. The numerical results confirmed that the area and the depth of interface defects, or air gaps, are both important factors affecting the transient heat transfer observed from the CFRP surface. The larger the area of the interface defect, the longer the hot spot can be observed in the thermal image. The deeper the interface defect, the slower the hot spot becomes invisible. | ||
| 檔案： | 沒有相關檔案 | |
| 相關連結： | http://ethesys.lib.cyut.edu.tw/ETD-db/ETD-search-c/view_etd?URN=etd-0903107-144427 | |