研究生: |
林左田 |
---|---|
論文名稱: |
含邊緣開口疊層板中二維及三維應力集中因子的比較 Comparison of 2D and 3D Stress Concentration Factor in Edge Notched Laminates |
指導教授: | 蔣長榮 |
口試委員: |
張禎元
葉孟考 |
學位類別: |
碩士 Master |
系所名稱: |
工學院 - 動力機械工程學系 Department of Power Mechanical Engineering |
論文出版年: | 2014 |
畢業學年度: | 102 |
語文別: | 中文 |
論文頁數: | 63 |
中文關鍵詞: | 疊層板 、應力集中 、邊緣開口 |
相關次數: | 點閱:3 下載:0 |
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複合材料疊層板是由一層一層的單層板所疊加而成,每一層疊層次序可依需求而有所不同,而疊層板在實際使用上很常遇到開孔加工行為,會有應力集中的現象產生,會造成材料裂縫的生成成長而導致破壞。本文研究主要目的是在探討一含邊緣開口的三維複合材料疊層板,在無窮遠處受一單軸向拉伸負載作用時,以有限元素法,探討在不同的孔徑對厚度比、還有不同疊層次序下其應力集中因子的探討,而藉由有限元素套裝軟體『ANSYS』來進行本文的模擬與分析。
纖維走向0度與90度邊緣開口單層板的二維應力分析,無論在平面應力或平面應變的情況下,其x方向的應力皆隨著孔徑上升而略微上升。而纖維走向0度與90度邊緣開口單層板的三維應力分析,其開口處的x方向應力最大值皆會發生在板子的中平面處,會隨著孔徑上升而略微下降。以[0/90]s堆疊的邊緣開孔疊層板,其在0度層處會有較大的應力集中因子,其應力集中因子則會隨著開孔半徑的增加而稍下降。以[θ/-θ]s堆疊的邊緣開孔疊層板,隨著θ增加應力集中因子會跟著減小。
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