由實驗得知，利用蝕刻技術在材料表面製造出表面週期形貌可以提升材料機械性質。本文主要目的在於探討材料具有表面週期形貌下對於材料的應力場行為之影響。利用有限元素套裝軟體ABAQUS，建立二維具有表面週期形貌之模型，探討具有週期形貌下凹口尖端的應力集中效應與週期形貌下凹口尖端具有不同裂縫長度之應力強度因子。由數值分析得知，應力放大倍率與應力強度因子皆受到表面週期形貌幾何參數改變而有所影響。

Periodic surface feature, which were fabricated by etching techniques, can improve mechanical properties of materials from experimental observation. The main purpose of this research is to explore the influence of periodic surface feature to stress field of materials. Two-dimensional finite element models of periodic surface feature were built using ABAQUS to study the stress concentration at the notch tip, and the stress intensity factor near the crack tip for different crack growth from the notches of periodic surface feature. From numerical results, it is found that the stress concentration and stress intensity factor were affected by the change of geometric parameters of periodic surface feature.

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