3238A/EW250F复合材料的弯曲疲劳性能  

Bending Fatigue Properties of 3238A/E250F Composite Material

作　　者：马丽婷[1,2] 陈新文[1,2] 王海鹏[1,2] 邓立伟[1,2] 王翔[1,2] 

机构地区：[1]北京航空材料研究院,北京100095 [2]航空材料检测与评价北京市重点实验室,北京100095

出　　处：《理化检验（物理分册）》2015年第6期399-401,共3页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：运用三点弯曲加载方式对3238A/EW250F复合材料的弯曲疲劳性能进行了研究。结果表明:该复合材料弯曲疲劳寿命的分散性较小,所有试验点的疲劳寿命都满足90%置信度的中值寿命;所有试样均在有效部位发生破坏,且试样表面出现分层后,还有较长的一段寿命期;试验测得0°方向铺层3238A/EW250F复合材料的条件疲劳极限以动应力表示为σr=73.2 MPa。The bending fatigue properties of 3238A/EW250F composite material were studied by three points bending loading mode. The results show that the dispersion of bending fatigue life of the composite was rather small, and the fatigue life of all test samples could meet 90% confidence median life requirements. All samples were destroyed at the effective part, and after surface delamination there was still a long period of life. The fatigue limit expressed with dynamic stress of 3238A/EW250F composite laid in 0°direction was 73.2 MPa.

关 键 词：3238A/EW250F复合材料 弯曲疲劳性能 疲劳极限 

分 类 号：TB332[一般工业技术—材料科学与工程]