臺灣博碩士論文加值系統

摘要

本文是以FSW製程進行研究，觀察其製程對於鋁合金A5083-O材料之影響，期望從觀察其靜態試驗的結果裡，合理的解釋FSW銲接後所產生的疲勞裂縫進展行為特徵，並且應用FSW無縫接合的觀念，實際地進行修補疲勞裂縫的銲補工作。並以FEM模擬製程中的溫度場分布，並以實測溫度驗證FEM模擬銲接之結果，期望能應用於現場工作中。

研究進行的分為三個方向：

(1)進行靜態實驗，包括硬度量測、殘留應力量測以及溫度量測。而後進行銲道邊緣左右側以及從垂直銲道方向之疲勞裂縫成長試驗，分析靜態結果對於疲勞試驗結果之影響，了解因為FSW所造成銲道兩邊不同性質之影響。

(2)使用FEM模擬製程時溫度場的分布，預先了解銲接參數造成之溫度分布。

(3)使用FSW應用於修補因為疲勞所產生的裂縫，並觀察其修補前後之疲勞行為。

ABSTRACT

This text make with FSW Cheng carry on research , observe it make Cheng to aluminium alloy influence , A5083-O of material, expect that from observes it in the result of its static test , the behavior characteristic that tired cracks produced develop after rational explanation FSW is welded , use FSW is it sew idea of joint to have , mend the welding and mending working of the tired crack actually. And make Cheng Zhong's temperature field to distribute with FEM simulation , and verify the result welded in FEM simulation by surveying temperature, expect to be able to apply to the work on the spot.

The ones that study and carry on are divided into three directions:

(1)Carry on the static experiment , including the hardness amount examines, remains examining in conformity with strength examining and temperature amount. And then weld the side of about a line of edge and grow up and test from the vertical tired crack which weld a direction, analyse the static influence on the tired result of the test of result, understand because FSW causes and welds the influence of different nature of both sides .

(2)Use FEM simulation distribution of temperature field when making Cheng , understand in advance that welds the temperature profile that the parameter causes.

(3)Use FSW to be applied to mend in because the tired crack produced , and the tired behavior of observing it before and after mending.

目錄
摘要 III
ABSTRACT IV
誌 謝 V
目錄 VI
圖目錄 VIII
表目錄 IX
第一章 緒論： - 1 -
1.1前言 - 1 -
1.2 研究動機： - 3 -
1.3 研究方法 - 4 -
1.4本文架構 - 5 -
第二章 相關文獻回顧 - 7 -
2.1 摩擦攪拌銲接 (Friction Stir Welding,FSW) - 7 -
2.1.1 摩擦攪拌銲接簡介 - 7 -
2.1.2 摩擦攪拌銲接機械性質 - 8 -
2.1.3摩擦攪拌銲接產熱機制 - 11 -
2.1.4攪拌桿的設計 - 14 -
2.2 鑽孔法量測殘留應力[30,31] - 15 -
2.3.1 應力強度因子（Stress Intensity Factor） - 20 -
2.3.2 巴里定律 (Paris Law) - 23 -
2-4 裂縫修補法回顧 - 26 -
第三章 靜態實驗分析 - 28 -
3.1 攪拌桿設計及銲接參數的設定 - 28 -
3.1.1攪拌桿設計 - 28 -
3.1.2銲接參數之設定 - 30 -
3.2 材料拉伸實驗系統 - 31 -
3.3 溫度場實測及模擬 - 33 -
3.3.1 溫場量測實驗系統： - 33 -
3.3.2溫場量測設備簡介: - 33 -
3.3.3溫場量測實驗之方法: - 33 -
3.3.4 ANSYS溫度場的模型建立 - 34 -
3.4硬度檢測： - 38 -
3.5 殘留應力之量測 - 39 -
3.5.1 實驗設備簡介 - 39 -
3.5.2 應變值的量測 - 39 -
3.5.3 實驗試片與材料性質 - 39 -
3.5.4 實驗步驟 - 41 -
第四章 靜態實驗結果 - 44 -
4-1 材料拉伸實驗結果 - 44 -
4-2 溫度場實測以及模擬結果 - 44 -
4.3 硬度值量測結果 - 49 -
4.4 殘留應力量測結果 - 50 -
第五章 疲勞試驗及其結果 - 52 -
5-1 疲勞實驗系統 - 53 -
5.1.1疲勞實驗系統簡介 - 53 -
5.1.2實驗系統與實驗設備： - 54 -
5.2疲勞實驗之方法 - 55 -
5.3 疲勞試驗片條件規格 - 55 -
5.4 疲勞實驗結果 - 58 -
5.4.1 S-N Curve - 58 -
5.4.2 a-N曲線 - 60 -
5.4.3 da/dN-ΔK - 62 -
5.5 修補裂縫 - 63 -
5.5.1修補裂縫之簡介 - 63 -
5.5.2 修補裂縫試片之疲勞試驗結果 - 65 -
第六章 結論 - 68 -
參考文獻： - 70 -

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