通过拉伸、压缩实验,从宏观上研究了平纹编织C/SiC复合材料在简单载荷作用下模量、残余应变及泊松比的变化.通过断口观察,分析了材料在面内拉、压载荷作用下的损伤与失效模式.实验结果表明,拉伸载荷作用下,材料在低应力就开始损伤.0°纤维束表面基体开裂和层间裂纹是主要损伤形式.损伤后,随着应力增加,拉伸卸载模量、泊松比线性减小,残余应变增加;压缩应力应变基本呈直线关系,模量、泊松比基本不变.拉伸破坏表现为韧性断裂,断裂机理为分层后0°纤维束的断裂、携带90°纤维束拔出;压缩破坏形成一个与加载方向成13°的断裂平面,破坏机理为层间裂纹、0°/90°纤维束之间裂纹和90°纤维束内裂纹的产生和迅速扩展、最后0°纤维束剪切断裂.
参考文献
| [1] | 张立同,成来飞,徐永东.新型碳化硅陶瓷基复合材料的研究进展[J].航空制造技术,2003(1):24-32. |
| [2] | Jacobsen T K, Brondsted P. Mechanical properties of two plain woven chemical vapor infiltrated silicon carbide-matrix composites [J]. JAm Ceram Soc, 2001, 84(5): 1043-51. |
| [3] | Calard V, Lamon J. A probabilistic-statistical approach to the ultimate failure of ceramic-matrix composites. Part Ⅰ:Experimental Investigation of 2D Woven SiC/SiC Composites [J]. Composites Science and Technology, 2002, 62: 385-392. |
| [4] | Dalmaz A, Ducret D, Guerjouma R E, et al. Elastic module of a 2.5D Cf/SiC composite: Experimental and theoretical es timates [J]. Composite Science and Technology, 2000, 60:913-925. |
| [5] | Camus G. Modeling of the mechanical behavior and damage processes of fibrous ceramic matrix composites: Application to a 2-D SiC/SiC [J]. International Journal of Solids and Structures, 2000, 37: 919-942. |
| [6] | Chaboche J L, Maire J F. New progress in micromechanics based CDM models and their application to CMCs [J]. Com posite Science and Technology, 2001, 61:2239-2246. |
| [7] | Camus G, Guillaumat L, Baste S. Development of damage in a 2D woven C/SiC composite under mechanical loading Ⅰ :Mechanical characterization [J]. Composite Science and Technology, 1996, 56: 1363-1372. |
| [8] | 王波,矫桂琼,潘文革,等.三维编织C/SiC复合材料的拉压实验研究[J].复合材料学报2004,21(3):110-114.Wang B, Jiao G Q, Pan W G, etal. Tensile and compress experimental investigation of three-dimensionally braided C/SiC composites [J]. Acta Materiae Compositae Sinica,2004, 21(3): 110-114. |
| [9] | 陶亮,矫桂琼,王波.三维编织CMC断裂韧性表征形式的试验研究[J].应用力学学报,2002,19(3):149-152. |
| [10] | 潘文革,矫桂琼,王波,等.声发射技术在三维编织C/SiC复合材料拉伸损伤分析中的应用[J].无机材料学报,2004,19(4):871-875. |
| [11] | 栾新刚,成来飞,张立同,等.SiC-C/SiC复合材料的高温低周应力腐蚀机理和寿命预测[J].复合材料学报,2004,21(3):44-48.Luan X G, Cheng L F, Zhang L T, etal. Corrosion kinetic and life prediction equation of SiC-C/SiC composite under low frequency cycle stress at high temperatures [J]. Acta Materiae Com positae Sinica , 2004, 21(3): 44-48. |
| [12] | 潘文革.声发射技术在C/SiC复合材料损伤检测中的应用[D].西安:西北工业大学,2003. |
| [13] | Vagaggini E, Domergue J M, Evans A G. Relationship between hysteresis measurements and the constituent properties of ceramic matrix composites Ⅰ : Theory [J]. J Am Ceram Soc, 1995, 78(10): 2709-2720. |
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