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The Role of Three Dimensional Reinforcement on Fracture Behavior of Carbon-Carbon Composites

机译:三维增强对碳复合材料骨折行为的作用

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Fracture behavior of 2D and 3D carbon/carbon composites, 2D-C/Cs and 3D-C/Cs, was experimentally compared by the compact tension method. The 3D-C/Cs were shown to possess far higher fracture resistance than the 2D-C/Cs. This high fracture resistance of the 3D-C/Cs was explained in terms of extremely low shear resistance and high shear deformation. The former low shear resistance is shown that to be derived from many interfacial cracks between fiber bundles and pure matrix. These cracks appear due to 3D mechanical constraints by the 3D reinforcement. The latter behavior is induced by the entangled three-dimensional reinforcement structure.
机译:通过紧凑的张力法实验比较2D和3D碳/碳复合材料,2D-C / CS和3D-C / CS的断裂行为。显示3D-C / Cs比2D-C / Cs具有更高的裂缝抗性。在极低的剪切抗性和高剪切变形方面解释了3D-C / CS的这种高裂缝抗性。以前的低剪切抗性显示出源自纤维束和纯基质之间的许多界面裂缝。这些裂缝由于3D加固而导致3D机械约束。后一种行为由缠绕的三维加强结构引起。

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