本論文研究使用一套非線性破壞分析模式，針對開孔複合材料圓柱殼受扭力載重下的情形，進行材料的破壞預測及分析探討。此非線性破壞分析模式主要包含三部分：1.材料破壞前的非線性組成律、2.預測破壞時機的混合破壞準則、3.後破壞分析模式。
開孔纖維複合材料圓柱殼破壞前的非線性行為模擬，乃假設複合材料單層板在軸向及側向均為彈性─塑性行為，而面內剪力則使用定值剪力參數來模擬之。破壞時機的判斷依據則使用混合破壞準則，結合Tsai-Wu破壞準則和最大應力準則的優點。在後破壞行為分析中，對複合材料單層板軸向和剪力方向之行為均假設成脆性模式破壞，而側向則採用逐降模式模擬之。
利用所建立的模型，延伸探討開孔複合材料圓柱殼受扭力作用下，在不同開孔孔徑尺寸、圓柱殼尺寸、疊序和扭力軸力之間的交互關係影響，作出歸納分析並討論之以期能應用在實務上。

A nonlinear failure mode had been used for studying and predicting material failure under the condition of composite laminated cylindrical shells with hole and subjected to combined axial force and torsion. This nonlinear failure mode including three parts: first, the nonlinear constitutive law of material before failure; second, the mixed failure criterion to predict the time of failure; third, the analysis of post failure mode.
The simulation of nonlinear mode before failure for the composite laminated cylindrical shells with hole is assumed that lamina is plastic-elastic in axial and transverse directions, and using constant shear parameter in in-plane. The mixed failure criterion, combining the excellence of Tsai-Wu theory and maximum stress theory, had been used for judge failure timing. During analyzing of post failure mode for the composite laminated cylindrical shells with hole, the brittle failure mode had been adopted in axial and shear direction, and degrading mode in transverse direction.
Analyzed and discussed the conclusion about this study which is composite laminated cylindrical shells with hole under torsion load with different size of holes, cylindrical lengths, order of laminates, and torsion-axial forces.

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