为研究碳纤维增强树脂基复合材料开孔层板在压缩加载过程中的损伤起始、演化方式和损伤特点,采用微距拍摄、逐级加载超声C扫描、X光扫描和扫描电子显微镜观测4种观测手段对国产CCF300/5228A[45/0/-45/90]4s、[452/02/-452/902]2s、[454/04/-454/904]s3种铺层方式的开孔层板进行了压缩试验研究.对压缩载荷作用下开孔层板的损伤起始和损伤演化进行了观察和对比.对试验中观测到的纤维微屈曲、纤维挤出、孔边开裂和分层扩展等现象之间的关系进行了分析和说明.试验结果表明:压缩载荷下45°和90°铺层相邻位置为层板易分层位置,含45°和90°铺层相邻位置的开孔层板渐进损伤过程较为明显:开孔层板在压缩载荷下较早出现损伤,损伤的起始和演化缓解了孔边应力集中,促使压缩应变能在孔边逐步释放,推迟开孔层板压缩破坏的发生,提高层板压缩承载能力.研究结果可为材料结构损伤容限设计提供依据.
参考文献
| [1] | 杜善义;关志东.我国大型客机先进复合材料技术应对策略思考[J].复合材料学报,2008(1):1-10. |
| [2] | C. Soutis;P. T. Curtis.A method for predicting the fracture toughness of CFRP laminates failing by fibre microbuckling[J].Composites, Part A. Applied science and manufacturing,20007(7):733-740. |
| [3] | H. Suemasu;H. Takahashi;T. Ishikawa.On failure mechanisms of composite laminates with an open hole subjected to compressive load[J].Composites science and technology,20065(5):634-641. |
| [4] | Tomohiro Yokozeki;Yuichiro Aoki;Toshio Ogasawara.Experimental characterization of strength and damage resistance properties of thin-ply carbon fiber/toughened epoxy laminates[J].Composite structures,20083(3):382-389. |
| [5] | G.H. Ercin;P.P. Camanho;J. Xavier;G. Catalanotti;S. Mahdi;P. Linde.Size effects on the tensile and compressive failure of notched composite laminates[J].Composite structures,2013Feb.(Feb.):736-744. |
| [6] | 关志东;黎增山;刘德博;李星.复合材料层板开孔压缩损伤分析[J].复合材料学报,2012(3):167-172. |
| [7] | Mathmood M. Shokrieh;Larry R. Lessard.Progressive fatigue damage modeling of composite materials, Part II: material characterization and model verification[J].Journal of Composite Materials,200013(13):1081-1116. |
| [8] | X.S. Sun;V.B.C. Tan;T.E. Tay.Micromechanics-based progressive failure analysis of fibre-reinforced composites with non-iterative element-failure method[J].Computers & structures,201111/12(11/12):1103-1116. |
| [9] | Michael R. Wisnom;Stephen R. Hallett.The role of delamination in strength, failure mechanism and hole size effect in open hole tensile tests on quasi-isotropic laminates[J].Composites, Part A. Applied science and manufacturing,20094(4):335-342. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%