摘要
本文針對含邊緣開口的異向性（Anisotropic）平板，在無窮遠處承受單軸拉應力（Uniaxial Tension Stress）時，利用有限單元法分析板之半厚度與開口半徑在不同比例下，探討應力集中與基材損傷區（Matrix Damage Zone）成長的關係。
首先，在彈性範圍內，假設在二維條件下，以『ANSYS』模擬之結果與文獻試做比較，驗證模擬值。進而考慮在三維彈塑性條件下等向性（Isotropic）平板應力集中現象與塑性區（Plastic Zone）成長關係。接著分析纖維加強之異向性平板在施力方向與纖維方向的夾角（ ， ）不同時，探討應力集中現象與基材損傷區之間的關係。
本文發現在等向性材料時應力集中因子對於塑性區成長有顯著的關係，而在異向性材料中施力方向與纖維方向的夾角與基材損壞區成長有明顯的相關。

關鍵字：異向性、應力集中、彈塑性

Abstract
In this paper, we use the notched anisotropic plates at infinity under uniaxial tensile stress, and we use the finite element method to analyze the relationship between stress concentration and the matrix damage zone growth according to different proportions of plate thickness and the opening radius.
First, we compare the result of “ANSYS” simulation under the assumed two-dimensional condition with the literature in order to validate simulation value. Second, we consider the relationship between isotropic stress concentration plate and plastic zone growth under the condition of three-dimensional elastoplastic. Finally, we analyze the relationship between stress concentration and the substrate damage zone, according to different angles between the force direction and fiber orientation of the anisotropic fiber reinforced plate.
We found that in isotropic materials the stress concentration factor has a significant influences on plastic zone growth. In anisotropy material, the angle between force direction and fiber orientation are closely related to substrate damage zone growth.

Keywords: anisotropy, stress concentration, elastoplastic

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