电阻法预报CFRP层板疲劳损伤演变过程.PDF

12 2 Vol12 No2 2 0 0 44 MATERIALS SCIENCE TECHNOLOGY Apr. , 2004 CFRP 1 2 2 2 莫淑华,赵海涛 , 张博明, 武湛君 ( 1. , 150050,E- ail: oshuhua@ 163.co ; 2. , 150001) : 通过类比方式, 以电阻变化作为复合材料的损伤参数, 建立了用电阻损伤参数预报CFRP 层板疲 损伤的数学模型,通过拉- 拉疲 试验, 对CFRP层板的疲 损伤与疲 寿命预报进行研究, 建立了累积损伤 中电阻与疲 损伤状态之间的关系.研究表明,在疲 损伤过程中, 电阻损伤参数的变化同材料的疲 损伤 过程密切相关, 电阻损伤规律可分为下降阶段平稳阶段和破坏阶段; 碳纤维材料的电阻变化能够反映纤维 的损伤程度和破坏形式, 可以作为表征复合材料纤维损伤的有效参数. : 复合材料; 碳纤维;损伤; 电阻;强度 : TB323;O3482 : A : 1005- 0299(2004)02- 0186- 04 Resistance measuring method on damage evolution and fatigue life prediction for CFRP laminates 1 2 2 2 MO Shu-hua ,ZHAOHa-i tao ,ZHANG Bo- ing ,WU Zhan-jun ( 1. Dept. of Materials Che ical Engineering, Heilongjiang Institute of Technology, Harbin 150050,China, E- ail: oshuhua@ 163.co ;2. Centrefor Co posite Materials Strutctures, Harbin Institute of Technology, Harbin 150001, China) Abstract: Carbon is a kind of good conductance aterial of electricity. Electrical resistance variance of carbon fibers can revealthestyle and extent of da age, which is an effectivepara eter to characterize da age of carbon fiber reinforced co posites. It is a valuable technique to predict fatigue life for co posites. In this paper, with electrical resistanceas a da age index, a athe atical odel is established to predict the fatigue life of CFRP la inates and verified by the fatigue test. It is proved that the test results agreedwell with the odel and the electrical resistance da age index is closely related to the fatigue process of aterials, which can be divided into 3 stages during the