博碩士論文 81343002 詳細資訊




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姓名 何明雄(Ming-Hsiung Ho)  查詢紙本館藏   畢業系所 機械工程學系
論文名稱 PC/ABS合膠材料機械性質之研究
(The Study on Mechanical Properties in Polycarbonate/ Acrylonitrile-Butadiene-Styrene Blend)
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摘要(中) 灰色關聯分析法以專家的意見,能適切預測C-MOLD射出成型模擬及拉伸試驗結果的最佳成型條件。
充填時間長對拉伸性質有強化的影響。主要破壞機構有傾斜縮頸及應力白化現象。融膠溫度280℃的試片呈現劈裂狀的脆性破壞。
具最佳破壞韌性值之成型條件為充填時間2秒、融膠溫度260℃與模具溫度55℃。破壞韌性值與表皮層正規化厚度有密切關係。主要破壞機構為表皮層脆性劈裂的片狀組織、核心層毛狀拉起纖維。
疲勞裂縫延伸的最佳成型條件為充填時間2秒、融膠溫度260℃與模具溫度80℃。應力白化及補綴狀組織為主要破壞機構。
單次衝擊與衝擊疲勞最高吸收能量的成型條件為充填時間12秒、融膠溫度260℃及模具溫度80℃。單次衝擊為高變形量的塑性變形。衝擊疲勞為塑性變形,疲勞線紋不連續但周期性的沿著裂縫延伸方向出現。
綜合以上研究,建議成型條件之融膠溫度採用240℃至260℃,充填時間依成型件的體積,如拉伸試片、CT試片使用2秒、衝擊試片使用12秒。模具溫度選用80℃。
摘要(英) The following conclusions can be drawn from the tests.
The predictions of the grey relational method were the same as C-MOLD simulation and tensile test results.
The tensile properties increase with filling time especially in elongation. The main fracture mechanisms of tensile specimens were stress whiten and inclined neck.
The best injection molding condition of fracture toughness specimen was filling time 2s, melting temperature 260℃and mold temperature 55℃. The fracture toughness is varied with according with normalized skin layer thickness. Stress whiten, splits and fibril-like were typical fracture mechanisms.
The best injection molding condition of fatigue crack propagation test was filling time 2s, melting temperature 260℃ and mold temperature 80℃. Stress whiten and patchwork structure were main fracture mechanisms.
The specimen with the molding condition of filling time 12s, melting temperature 260℃ and mold temperature 80℃ has the optimum impact fatigue and single impact behaviors. Tearing in single impact test, shear fracture and plastic deformation in impact fatigue test were the major fracture mechanisms.
關鍵字(中) ★ 合膠
★ 機械性質
★ 破壞韌性
★ 疲勞裂縫延伸
★ 衝擊疲勞
★ 灰色關聯分析
★ 拉伸性質
★ 成型條件
關鍵字(英) ★ PC/ABS
★ FRACTURE TOUGHNESS
★ FATIGUE CRACK PROPAGATION
★ IMPACT FATIGUE
★ GREY RELATIONAL ANALYSIS
★ INJECTION MOLDING CONDITION
論文目次 封面
摘要
ABSTRACT
誌謝
總目錄
圖目錄
表目錄
符號說明
第一章 前言
1-1 塑膠合膠材料
1-2 射出成型加工法簡介
1-3 研究現況
1-4 本文架構
第二章 理論基礎
2-1 灰色關聯分析法
2-2 高分子材料破壞行為
2-3 衝擊疲勞
第三章 實驗方法與步驟
3-1 實驗材料
3-2 模具設計
3-3 成型條件範圍之擬定
3-4 試片準備
3-5 試驗方法與使用設備
3-6 破斷面觀察
第四章 灰色關聯分析與C-MOLD射出成型條件之模擬分析
4-1 灰色關聯分析
4-2 C-MOLD射出成型條件之模擬分析
第五章 PC/ABS合膠材料之拉伸性質與其灰色關聯分析
5-1 灰色關聯分析
5-2 拉伸試驗
第六章 PC/ABS合膠材料之破壞韌性
6-1 破壞韌性值
6-2 破壞機構
第七章 PC/ABS合膠材料之疲勞裂縫延伸
7-1 疲勞裂縫延伸速率
7-2 疲勞裂縫延伸機構
第八章 PC/ABS合膠材料之衝擊性質
8-1 單次衝擊特性
8-2 衝擊疲勞特性
8-3 破壞機構分析
第九章 綜合討論與結論
9-1 綜合討論
9-2 綜合結論
第十章 未來研究方向與建議
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指導教授 董基良、黃俊仁
(Ji-Liang Doong、Jiun-ren Hwang)
審核日期 2000-7-18
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