2008-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/704163摘要：本計畫擬採用自行撰寫描述晶格變形機制之聚晶體模型，搭配有限元素分析套裝軟體應用於金屬接觸表面粗糙化及精微製程之檢視。嘗試藉由實驗量測與影像處理技術建構包含三維晶粒形狀，尺寸，與組織結構資訊，以合理模擬具晶體行為。兩個具備不同粗糙度表面相互接觸，對於其摩擦、磨耗、及潤滑等行為均可能有顯著影響。以往於金屬微製造過程，大多依據經驗及試誤法判斷工件與模具接觸行為，惟其準確度及效率表現均不甚理想。因此擬應用本計畫開發之聚晶體模型深入了解金屬於加工過程中之表面輪廓變化情形，據以作為製程參考，從而改善工件表面品質。<br> Abstract: The advantage of micromechanical polycrystalline approach is that the constitutive behavior can be simulated under any loading path once the constitutive parameters of slip processes and the initial distribution of grain orientations of a workpiece are known. A crystalline model, implemented into the finite element analysis commercial software, is developed to investigate behaviors of metal materials with various crystal structures in the present study. Three-dimensional grain shapes, sizes, and orientations are re-constructed by utilizing a serious of the experiments and an image processing technique as well. Roughness between two contact surfaces generally plays an important role in the associated friction, wear, and lubrication performances. In the past, evaluations of the contact behavior between dies and a workpiece under the metal processing procedures are mostly based on empirical approaches which could not have sufficient accuracy though. The polycrystalline model is therefore adopted to examine the deformation of contact surfaces. Such investigation is then anticipated to be helpful for the surface quality improvement.聚晶體模型表面粗糙化有限元素分析polycrystalline modelsurface rougheningfinite element analysis