研究了二维正交编织C/SiC双边对称圆弧缺口试样室温和高温真空的拉拉疲劳行为,正弦波疲劳应力比R=0.1,频率60Hz,循环基数106次.循环到规定周次停机,测量试样的共振频率、电阻,并进行SEM观察.结果表明,2D-C/SiC复合材料缺口试样拉-拉疲劳的S-N曲线非常平坦,其疲劳极限是同温度下缺口试样拉伸强度的80%～90%,光滑试样和缺口试样的疲劳极限比值与理论应力集中系数基本相同.缺口试样在疲劳过程中,电阻表征损伤与模量表征损伤的规律基本一致.在疲劳试验初期阶段,缺口附近损伤发展很快,主要表现为产生大量与加载方向垂直的裂纹,随着疲劳次数的增加,损伤发展减缓,但损伤形式逐渐增多,缺口附近与加载方向垂直的裂纹数量明显多于平行加载方向的裂纹数.讨论了电阻表征损伤和模量表征损伤之间的关系.
参考文献
| [1] | Gérald Camus;Laurent Guillaumat;Stéphane Baste .Development of damage in a 2D woven C/SiC composite under mechanical loading:mechanical characterization[J].Journal of Computer Science and Technology,1996,56:1363. |
| [2] | Zhu S;Mizuno M;Kagawa Y et al.Monotonic tension,fatigue and creep behavior of SiC-fiber-reinforced SiC-matrix composites:a review[J].Journal of Computer Science and Technology,1999,59:833. |
| [3] | Pakaonstantiou C G;Balaguru P;Lyon R E .Comparative study of high temperature composites[J].Composites Part B:Engineering,2001,32:637. |
| [4] | Paar R.;Danzer R.;Valles JL. .Influence of fibre properties on the mechanical behaviour of unidirectionally-reinforced ceramic matrix composites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(2):209-216. |
| [5] | Wang MD.;Laird C. .DAMAGE AND FRACTURE OF A CROSS WOVEN C/SIC COMPOSITE SUBJECT TO COMPRESSION LOADING[J].Journal of Materials Science,1996(8):2065-2069. |
| [6] | Brennan J J.Interfacial studies of chemical-vapor-infiltrated ceramic matrix composites[J].Materials Science and Engineering A,1990(126):203. |
| [7] | 乔生儒,杜双明,纪岗昌,韩栋,李玫.3D-C/SiC复合材料的损伤机理[J].机械强度,2004(03):307-312. |
| [8] | James M. Staehler;Shankar Mall;Larry P. Zawada .Frequency dependence of high-cycle fatigue behavior of CVI C/SiC at room temperature[J].Composites science and technology,2003(15):2121-2131. |
| [9] | 杜双明,乔生儒,纪岗昌,韩栋.3D-C/SiC复合材料拉-拉疲劳模量和电阻的变化[J].宇航材料工艺,2002(05):38-41,44. |
| [10] | 杜双明,乔生儒,纪岗昌,韩栋.3D-C/SiC复合材料在室温和1300℃的拉-拉疲劳行为[J].材料工程,2002(09):22-25. |
| [11] | Heywood R B.Designing by photoelasticity[M].London:Chapman and Hall,1952 |
| [12] | Lemaitre J;倪虎刚;陶春虎.损伤力学教程[M].北京:科学出版社,1996:23. |
| [13] | Nikhilesh Chawla;Yahya K Tur;John W Holmes et al.High-frequency fatigue behavior of woven-fiber-reinforced polymer-derived ceramic-matrix composites[J].Journal of the American Chemical Society,1998,81(05):1221. |
| [14] | Christine Drollard;Jacques Lamon .Fracture toughness of 2D-woven SiC/SiC CVI composites with multilayered interphase[J].Journal of the American Ceramic Society,1996,79(04):849. |
| [15] | Boccaccini AR;Pearce DH;Janczak J;Beier W;Ponton CB .Investigation of cyclic thermal shock behaviour of fibre reinforced glass matrix composites using non-destructive forced resonance technique[J].Materials Science and Technology: MST: A publication of the Institute of Metals,1997(10):852-858. |
| [16] | Wang Mingde;Laird Campell .Tension-tension fatigue of a cross-woven C/SiC composite[J].Materials Science and Engineering A,1996,230:171. |
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