在航太、造船和海洋工程等領域，結構損傷（如裂紋）的修補是保障結構安全性和延長其使用壽命的關鍵課題。利用複合材料貼片具有高強度、輕便和耐腐蝕等優勢對結構進行修補，能夠顯著提升結構強度。本研究利用有限元素軟體ABAQUS計算利用積層複合材料對具裂紋金屬結構之破壞力學行為，並分析裂紋長度、裂紋角度、外力載荷、裂紋位置及裂紋種類對應力強度因子的影響。研究結果表明纖維排列角度對修補效果有顯著影響，其中最佳的纖維排列角度需要根據裂紋角度做選擇。對於貫穿裂紋雙面貼片修補的修補效果顯著好於單面貼片修補。此外裂紋位置和種類亦對應力強度因子也有影響。選擇合適的纖維排列角度及修補方式可顯著提升結構的結構強度和疲勞壽命。這一研究對工程應用具有重要意義，未來可進一步探討不同複合材料和調整複合材料的影響，以期得到更好的修補效果。

In fields such as aerospace, naval architecture, and ocean engineering, the repair of structural damage (such as cracks) is a critical issue for ensuring structural safety and extending its service life. Utilizing composite materials, which have advantages such as high strength, light weight, and corrosion resistance, for structural repairs can significantly enhance structural strength. This study uses the finite element software ABAQUS to calculate the fracture mechanics behavior of cracked metallic structures repaired with laminated composite materials. It analyzes the effects of crack length, crack angle, external load, crack location, and crack type on the stress intensity factor.The research results indicate that the fiber orientation angle has a significant impact on the repair effectiveness, with the optimal fiber orientation needing to be chosen based on the crack angle. For through-thickness cracks, double-sided repairs are significantly more effective than single-sided repairs. Additionally, the crack location and type also influence the stress intensity factor. Choosing the appropriate fiber orientation angle and repair method can significantly enhance the structural strength and fatigue life of the structure. This research holds important implications for engineering applications. Future studies could further explore different composite materials and adjustments to achieve improved repair effectiveness.

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