提出手工预缝纫方法将3K丝束的T300碳纤维引入预成型体,采用CVI工艺在预成型体和缝线处同时渗透SiC基体,制备了Z-pin增强平纹编织C/SiC陶瓷基复合材料。通过三点弯曲试验测定了Ⅰ＋Ⅱ混合型应变能释放率,分析了材料的裂纹扩展行为和Z-pin增强机理。结果表明：随着裂纹扩展长度的增大,Ⅰ＋Ⅱ型裂纹扩展阻力不断增大,相同裂纹扩展长度,增加Z-pin植入密度可以提高粘结强度,增大止裂作用。Z-pin增强平纹编织C/SiC陶瓷基复合材料裂纹扩展的耗能途径主要是层间界面剥离、Z-pin弹性剪切和拉伸变形。
A manual pre-stitching method was developed to introduce 3K T300 carbon fiber bundles into preforms.Plain woven ceramic matrix composites（CMCs） reinforced with Z-pins were manufactured by using chemical vapor infiltration（CVI） to infiltrate SiC matrix into plain woven preforms and carbon fiber sutures.Three-point flexure test was used to check mixed mode Ⅰ＋Ⅱ strain energy release rates for delamination of Z-pin reinforced plain woven C/SiC ceramic matrix composites.The delamination behaviors and reinforced mechanisms for the material were analyzed.The results show that crack growth resistance of mode Ⅰ＋Ⅱ delamination increases with increasing debonding length,and that at the same debonding length,bond strength and arrest action improve with increasing the density of Z-pin.Interlaminar interface debonding,elastic shear deformation and elastic tensile deformation of Z-pins are channels of the energy dissipation during delamination growth of Z-pin reinforced plain woven C/SiC ceramic matrix composites.
参考文献
| [1] | M B Dow;H B Dexter .Development of Stitched,Braided and Woven Composite Structures in the ACT Program and at Langley Research Center( 1985 to 1997 )Summary and Bibliography[NASA/TP-1997-206234][R].Hampton,Virginia |
| [2] | M Karal .AST Composite Wing Program-Executive Summary[NASA/CR-2001-210650][R].Hampton,Virginia |
| [3] | Larry W. Byrd;Victor Birman .Effectiveness of z-pins in preventing delamination of co-cured composite joints on the example of a double cantilever test[J].Composites, Part B. Engineering,2006(4/5):365-378. |
| [4] | I S Raju;E H Glaessgen .Effect of Stitching on Debonding in Composite Structure Elements[R].Hampton,Virginia |
| [5] | 刘鞲;矫桂琼 .z向增强平纹编织复合材料层间剪切强度[J].材料科学与工程学报,2009,27(05):664-667. |
| [6] | I K Partridge;D D R Cartie .Delamination Resistant Laminates by Z-fiber Pinning I:Manufacture and Fracture Performance[J].Composites Part A:Applied Science and Manufacturing,2005,36(01):55-64. |
| [7] | Denis D.R. Cartie;Manos Troulis;Ivana K. Partridge .Delamination of Z-pinned carbon fibre reinforced laminates[J].Composites science and technology,2006(6):855-861. |
| [8] | 刘(韦华),JIAO Gui-qiong,矫桂琼.Z-pin增强陶瓷基复合材料Ⅰ型应变能释放率[J].材料科学与工程学报,2009(03):381-384. |
| [9] | X. Zhang;L. Hounslow;M. Grassi .Improvement of low-velocity Impact and compression-after-impact performance by z-fibre pinning[J].Composites science and technology,2006(15):2785-2794. |
| [10] | A Clarke;E Greenhalgh;C Meeks;C Jones .Enhanced Structural Damage Tolerance of CFRP Primary Structures by Zpins Reinforcement[AIAA-2003-1679][R].Norfolk,Virginia |
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