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題名 | Effects of Surface Roughness on the Elastic-plastic Contact between the Fractal Rough Surface and a Plane=表面粗糙度對破碎粗糙面與平面之彈、塑性接觸效應 |
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作者 | 游憲一; 史展宏; 黃憲裕; | 書刊名 | 中國機械工程學刊 |
卷期 | 20:3 1999.06[民88.06] |
頁次 | 頁247-255 |
分類號 | 446.013 |
關鍵詞 | 表面粗糙度; 破碎粗糙面; 平面; 彈、塑性接觸效應; Fractal surface; Roughness; Contact; |
語文 | 英文(English) |
中文摘要 | 本文探討一個粗糙面與平面之接觸問題,粗糙面是由破碎理論所得之W-M函數所 模擬。表面粗糙度對實際接觸面積、接觸負荷及接觸尖點數之影響加以探討。數值模擬由平 面受壓並向粗糙面接近開始。文中結果發現G-W接觸模式僅適用於最光滑面與平面之接觸預 測,冪次關係式A□-L□為重要關係,而最粗糙面之冪次n接近於一。當接觸負荷增加時, 粗糙面上多數之接觸尖點終達降伏狀態,實際接觸壓力超過降伏強度並接近一個常數值。 |
英文摘要 | A rough surface, simulated by the W-M function derived from the fractal theory, in contact with a plane is studied in this paper. The effects of surface roughness on the real area of contact, the contact loading and the number of contact asperities are examined. Numerical simulations are performed as the flat plate is pressed toward the rough surface. It is found that the G-W contact model is valid only for the prediction of the contact between the smoothest surface and a plane. A power law relation A□-L□ is proposed and the exponent n for the roughest surface is found to be close to unity. Most of the contact asperities on the rough surface may eventually be yielded and the mean real contact pressures approach a constant value above the material yield strength as the contact loading increases. |
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