摘要
纤维埋入长度是单纤维拔出试验能否成功的关键因素之一,本文采用载荷位移曲线离散化方法将单纤维拔出过程离散为主要细观失效模式控制的不同阶段,建立了包含泊松效应影响的复合材料单纤维拔出力学模型,得到各阶段的载荷分布和位移分布。采用能量平衡失效准则建立了界面脱粘长度与外载荷的关系,针对SiC/RBSN陶瓷基复合材料,分析不同纤维埋入长度情况下,泊松比、界面摩擦系数等载荷位移曲线的影响。
One of the most powerful factors to determine the single-fiber pull-out test is the fiber embedded length. Discrete regions method was used to divide the stress-displacement curve into different stages which characterize the dominant damage modes. A theoretical model considering Poisson＇ s effect has been developed to study stress distribution and displacement distribution of different stages. The expressions of interface debonding length and the applied stress were obtained by using an energy balance criterion. The effects of Poisson＇s coefficient and interracial frictional coefficient in SiC/ RBSN ceramic matrix composites were analyzed with different fiber embedded length.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2008年第6期837-842,873,共7页
Journal of Materials Science and Engineering
基金
973重大基础项目资助
航空科学基金资助项目(05C52013)
关键词
航空
航天推进系统
单纤维拔出
纤维拔出过程
陶瓷基复合材料
纤维埋入长度
aerospace propulsion system
single fiber pull-out
fiber pull-out process
ceramic matrix composites
fiber embedded length
