An SHTB-based experimental technique for elevated temperature
An SHTB-based experimental technique for elevated temperature
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DOI：
10.2991/emeit.2012.64
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发表时间：
2012-09
期刊：
影响因子：
--
通讯作者：
Xuan Chen;Yulong Li;N. Ouyang
中科院分区：
文献类型：
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作者：
Xuan Chen;Yulong Li;N. Ouyang
介绍了一种在800℃高温下采用分体式霍普金森拉杆（SHTB）的实验新技术。通过该技术，我们对 2D C/SiC 复合材料在室温以及 20℃ 和 800℃ 高温下的动态性能进行了研究。研究发现，随着温度的升高，2D-C/SiC复合材料的失效强度和应变显着降低。对两种温度下动态拉伸载荷下失效试样断裂的SEM显微照片进行观察，发现在800℃高温下断裂相对光滑且短纤维拔出，我们将其归因于碳纤维在高温动态载荷下的氧化或部分氧化。
A new experimental technique by means of split Hopkinson tensile bar (SHTB) at elevated temperature of 800℃ was introduced. By this technique we carried out an investigation into the dynamic properties of 2D C/SiC composite at both room and elevated temperature of 20℃ and 800℃. It was found that the failure strength and strain of 2D-C/SiC composite decreases significantly with the increase of temperature. Observation of SEM micrographs of failed specimen fracture under dynamic tensile loading at both temperatures reveals a comparatively smooth fracture and short fiber pull-out at elevated temperature of 800℃, and we attribute it to the oxidation or partial oxidation of the carbon fibers under dynamic loading at elevated temperature.