| 研究生: |
鄭長貴 Cheng, Chang-Kuei |
|---|---|
| 論文名稱: |
具表面微結構之彈性體接觸問題數值分析 Numerical Analysis of Contact Problem of Elastic Solids with Surface Micro-Structures |
| 指導教授: |
林育芸
Lin, Yu-Yun |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 土木工程學系 Department of Civil Engineering |
| 論文出版年: | 2009 |
| 畢業學年度: | 97 |
| 語文別: | 中文 |
| 論文頁數: | 79 |
| 中文關鍵詞: | 勁度 、微結構 、楊氏模數 、無滑動接觸 、無摩擦接觸 |
| 外文關鍵詞: | Young’s modulus, microstructure, stiffness, frictionless contact, no-slip contact |
| 相關次數: | 點閱:91 下載:1 |
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本文主要在探討具微結構之彈性體與剛體球的接觸問題。利用有限元素模型分別模擬具有微結構的彈性基底,在不同半徑之剛體球下的無摩擦接觸和無滑動接觸,藉此了解微結構高度 、微結構間距 、彈性基底厚度 與剛體球半徑 在不同接觸條件下對於接觸半徑 、位移 及載重 之影響,並與Hertz 接觸理論公式比較,再進一步根據數值結果探討深寬比 、表面密度 、 對於整體接觸勁度之影響,並顯示整體勁度可視為微結構層勁度跟彈性基底層勁度之串聯結果。
In this research, we studied the contact problem of rigid sphere and elastic solids with surface microstructures. The finite element models were used to simulate the frictionless contact and no-slip contact between elastic solids with surface microstructures and rigid sphere of different radii. Based on our simulations, the effects of the microstructure height , the microstructure pitch , the thickness of elastic solid and the radius of rigid sphere on the contact radius , the displacement and the load under different contact conditions were discussed. Also the results were compared with the Hertz contact theory. Furthermore, the numerical results were used to find the influence of the aspect ratio , the surface density and on the effective stiffness of contact. It is shown that the effective stiffness can be combined by the stiffness of surface microstructure and elastic layer in series.
參考文獻
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