基于多层梁模型,在考虑材料非均匀性的基础上,采用有限元数值模拟的方法研究 了层状复合陶瓷的断裂行为.给出了复合陶瓷模型在三点弯曲的加载条件下,裂纹拐折和扩展 的过程,验证了层状复合陶瓷的主要增韧机理:裂纹沿软层界面拐折耗能.在此基础上,研究 了不同参数条件下,层状复合陶瓷韧性的变化规律.
Based on the multilayer beam model, with a view to the heterogeneity of the material, this paper focused
on the fracture behavior of the laminated ceramic composites by the finite-element method. In three-point bending condition, the crack propagation process that
the crack penetrates the hard layers and expands along the interfaces of soft layers was presented. The primary mechanism
that the soft layers decoy the crack expanding along the weak interfaces to absorb energy was affirmed. The toughness and strength changes
as a function of the parameters such as thickness ratio, heterogeneity index m, etc. were analyzed by the FEM numerical simulation.
参考文献
| [1] | Cook J, Gordon. J. E. Proc. R. Soc, 1964, A282: 508. [2] Favre J P. J. Mater. Sci., 1977, 12: 43--48. [3] Clegg W J. Nature, 1990, 347 (4): 455--461. [4] 唐春安, 等. 岩石破裂过程数值实验, 第一版. 北京: 科学技术出版社, 2003. 42--43. [5] 唐春安, 等, 地震学报, 1997, 19 (4): 337--346. [6] 蔡胜有, 等, 复合材料学报, 1999, 16 (2): 110--115. [7] 郭海, 等(GUO Hai, et al). 硅酸盐学报(Journal of the Chinese Ceramic Society), 1997, 25 (5): 532--536. [8] 咎青峰, 等, 山东陶瓷, 1999, 22 (2): 4--8. [9] 吴义兵, 等, 材料科学与工程, 1997, 15 (3): 11--14. [10] Liu Haiyuan, Strphen M. Hsu, J. Am. Ceram. Soc., 1996, 9 (24): 52--57. [11] Kovar, et al. J. Am. Ceram. Soc., 1997, 10 (24): 71--81. [12] 郭香华, 等(GUO Xiang-Hua, et al). 硅酸盐学报(Journal of the Chinese Ceramic Society), 2000, 28 (3): 234--239. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%