| 1D—C／C拉伸断裂的SEM动态原位观察 |
| |
| 引用本文： | 石荣,李贺军.1D—C／C拉伸断裂的SEM动态原位观察[J].理化检验(物理分册),1998,34(3):19-21. |
| |
| 作者姓名： | 石荣 李贺军 |
| |
| 作者单位： | 上海交通大学 上海200030(石荣，胡赓祥)，西北工业大学 西安710072(李贺军，康沫狂) |
| |
| 摘 要： | 采用动态ＳＥＭ原位技术对一种单向炭／炭复合材料（１Ｄ－Ｃ／Ｃ）的拉伸断裂过程进行了跟踪观察。结果表明，该材料为表面多处随机起裂，主裂纹择优扩展，表面裂纹扩展时裂纹尖端的表层热解炭基体发生塑性变形，塑变区形状与由Ｍｉｓｓｅｓ屈服准则所预测的塑性区尺寸符合得很好。
|
| 关 键 词： | SEM原位观察 炭／炭 复合材料 拉伸断裂 |
INVESTIGATION OF TENSION FRACTURE PROCESS OF A 1D-C/C WITH TN-SITU SEM |
| |
| Shi Rong Hu Gengxiang,Li Hejun Kang Mokuang.INVESTIGATION OF TENSION FRACTURE PROCESS OF A 1D-C/C WITH TN-SITU SEM[J].Physical Testing and Chemical Analysis Part A:Physical Testing,1998,34(3):19-21. |
| |
| Authors: | Shi Rong Hu Gengxiang Li Hejun Kang Mokuang |
| |
| Affiliation: | Shi Rong Hu Gengxiang Li Hejun Kang Mokuang(Shanghai Jiaotong University) (Northwestern Polytechnical University) |
| |
| Abstract: | Tension fracture process of a unidirectional carbon/carbon composite(1D-C/C) is investigated by means of in-situ SEM technology. The results show that the surface cracks produce occasionally, and the preferred spreading of main crack is controlled by the inner stress-strain field of the materials. The pyrolytic carbons in front of the crack on the surface manifest ductile deformation when the surface crack expands, and the shape of ductile deformation zone fits well with what is expected according to the Von Misses' yield criterion. |
| |
| Keywords: | 1D-C/C In-situ SEM Crack |
| 本文献已被 CNKI 维普 等数据库收录！ |
