摘要
预埋叶片的叶根连接分为螺栓与螺栓套金属件的连接和螺栓套与复合材料间的粘接。该拔出试验的目的是测量叶根螺栓屈服极限,验证螺栓套与复合材料的粘接强度强于叶根螺栓的连接。试验中取叶根圆柱段的1个螺栓套和两个1/2楔形条作为1个试验件,置于拉拔试验机上进行加载。结果表明,预埋螺栓套与复合材料粘接强度随接触面积的增大呈线性增加,有效缠纱长度越长,粘接强度越大。预埋螺栓套与复合材料的粘接强度设计值应大于螺栓的屈服载荷,否则预埋结构首先发生破坏。此项研究结果为预埋型风电叶片结构设计优化提供了指导。
The connection of embedded blade root consists of the connection of bolt with its sleeve and the bonding of bolt sleeve to composite material.The purpose of this pull out test is to measure the yield limit of leaf blade,and to verify that bond strength of bolt sleeve and composite material is stronger than that of leaf root bolt.In the experiment,one bolt sleeve and two 1/2 wedge bars were used as a test piece,which was placed on the drawing test machine.The results showed that bonding strength between the embedded bolt sleeve and the composite material increases linearly with the increase of the contact area,and the longer the yarn length,the greater the bonding strength is.The design value of bonding strength between embedded bolt sleeve and composite material should be greater than the yield load of the bolt,otherwise,the structure will be destroyed first.The results of this study may provide guidance for the optimization of the structure design of embedded wind turbine blades.
作者
吴彦波
仇艳龙
谢理国
余旭
刘成
WU Yanbo;QIU Yanlong;XIE Liguo;YU Xu;LIU Cheng(Tianjin Dongqi Wind Turbine Blade Engineering Co.,Ltd.,Tianjin 300480,China)
出处
《天津科技》
2016年第7期35-37,共3页
Tianjin Science & Technology
关键词
复合材料
风电叶片
螺栓预埋
静力拉拔测试
composite material
wind turbine blade
bolt embedded
static drawing test
