由於一般經理論推導所提出的解析解多考慮無限邊界問題，以避免建立模型時因邊界條件所導致分析上的困難，然而實際工程構件皆屬有限邊界，因此必須考慮邊界效應的影響，故本研究首先針對均質材料在積分區域不同時，對應力強度因子、J積分、T應力及Ct積分的影響以確認破壞參數的穩定性；研究中另一主題係針對中央裂縫和邊界裂縫在試體尺寸不一時分別對破壞參數影響的大小，配合例題的應用，除可驗證解析解的適用性外，也能進一步了解破壞參數與試體尺寸間的關係，以期能於實際工程問題中達到參考依據。

關鍵詞：邊界效應、應力強度因子、J積分、T應力、Ct積分

In order to advoid the complication coming from considering the boundary conditions, most of the analysistical solution derived from mathematical models in Linear Elastic Fracture Mechanics are with respective to infinite domain. Consequently, it have to consider the affect of boundery.So the first goal of our research is to see the influence of different integration area affect for intensity factors ,J integrals,T-stress and Ct integrals to make sure the stability of Damage parameters.And the second goal of our research is to see the influence of different finite size about the Damage parameters,i.e.,the factor 2a/w to the value of J integrals.By using the test example results,we can make sure different finite size affect about the Damage parameters,hoping we can use in actual engineering industry.

Keyword：Boundary Effect, intensity factors , J integrals,T-stress, Ct integrals

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