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首页> 外文会议>Mechanical properties and performance of engineering ceramics and composites IX >EFFECT OF SPECIMEN GEOMETRY ON MICROSTRUCTURAL FRACTURE BEHAVIOR IN NANO COMPOSITES UNDER HVEM
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EFFECT OF SPECIMEN GEOMETRY ON MICROSTRUCTURAL FRACTURE BEHAVIOR IN NANO COMPOSITES UNDER HVEM

机译：纳米几何条件下，试样几何形状对纳米复合材料微观结构断裂行为的影响

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摘要

Finite element analysis with the interface element was conducted in order to examine the influence of the specimen geometry on the microstructural fracture morphology in nano SiC/SiC composite during a miniaturized Double Notch Shear (DNS) test. From the serial computations, it is found that the inter-laminar shear strength can be quantitatively predicted numerically by using the interface element. In addition, it is revealed that me longer span length causes the larger fracture load under the condition of a forced displacement. Also, in the case of larger span length, the critical displacement for starting the shear fracture decreases with increasing the yield stress. Then, it is concluded that a relationship between the shear strength and the yield stress seems to be very important for selecting appropriate specimen geometry of the miniaturized DNS test.
机译：为了检查样品几何形状对微型SiC双缺口剪切（DNS）测试过程中纳米SiC / SiC复合材料的显微组织断裂形态的影响，进行了有限元分析。从串行计算中发现，可以通过使用界面元件来定量地预测层间剪切强度。另外，揭示了在力位移条件下较长的跨度会导致较大的断裂载荷。同样，在跨度较大的情况下，随着屈服应力的增加，开始剪切断裂的临界位移减小。然后得出结论，剪切强度和屈服应力之间的关系似乎对于选择小型化DNS测试的合适试样几何形状非常重要。

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