欢迎登录材料期刊网

材料期刊网

高级检索

通过对中心开孔、双边半圆切口和双边V型切口三种结构的静态拉伸测试及有限元模拟分析,比较了不同开孔/切口形式C/C编织复合材料的破坏行为.结果表明:三种开孔/切口形式的C/C试件在拉伸破坏中均表现为较强线性的应力-应变关系,且开孔/切口附近有明显的应力集中;板宽不变时,缺口强度对开孔/切口尺寸不敏感,而对其端部的曲率半径较敏感;孔端部材料不满足线弹性的破坏机制,发生了大规模的应力松弛,其尺寸随开孔/切口曲率半径的增大而增大,而对开孔/切口位置不敏感.

参考文献

[1] Yasuo K,Kikkawa A,Saito W,et al.Comparative study on tensile fracture behavior of monofilament and bundle C/C composites[J].Composites:Part A,2006,37:2241-2247.
[2] Hiroshi H,Keisuke T,Kogo Y.Compressive strength of three-dimensionally reinforced carbon-carbon composite[J].Carbon,2005,43:351-358.
[3] Kogo Y,Hatta H.Effect of stress concentration on tensile fracture behavior of C-C composites[J].Journal of Composite Materials,1998,32(13):1273-1294.
[4] 曾 涛,姜黎黎.三维编织复合材料力学性能研究展[J].哈尔滨理工大学学报,2011,16(1):34-41.Zeng Tao,Jiang Lili.Development of investigation into mechanical properties of 3D braided composites[J].Journal of Harbin University of Science and Technology,2011,16(1):34-41.
[5] Whitney J M,Nuismer R J.Stress fracture criteria for laminated composites containing stress concentration[J].J Compos Mater,1974,10:253-265.
[6] Kweon J H,Ahn H S,Choi J H.A new method to determine the characteristic lengths of composite joints without testing[J].Composite Structures,2004,66:305-315.
[7] Ahmed K S,Naidu S V.Elastic properties,notched strength and fracture criterion in untreated woven jute-glass fabric reinforced polyester hybrid composites[J].Materials and Design,2007,28:2287-2294.
[8] 孔宪仁,黄玉东,范洪涛,等.细编穿刺C/C复合材料不同层次界面剪切强度的测试分析[J].复合材料学报,2001,18(2):57-60.Kong Xianren,Huang Yudong,Fan Hongtao,et al.Test and analysis of interfacial shearing strengths of different levels for fine weave and piercen carbon/carbon composites[J].Acta Materiae Compositae Sinica,2001,18 (2):57-60.
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:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%