风电叶片用毛竹和麻竹竹青片层积材性能评价

Performance evaluation on laminated bamboo outer plylumber made of two bamboo species Phyllostachys pubescens and Dendrocalamus latiflorus used for wind turbine blade manufacturing

利用动态热机械分析仪(DMA)检测3～4年竹龄的毛竹与麻竹竹青试件的常温存储模量值,再按竹龄分别将毛竹与麻竹竹青制成竹青层积材,利用INSTRON5582万能力学试验机对毛竹与麻竹竹青层积材分别进行检测。实验证明:随着毛竹与麻竹竹龄的增加,毛竹与麻竹竹青试件的常温存储模量值也相应的增加。也就是说,在常温条件下毛竹与麻竹竹青的刚性随竹龄的增加而增加。3年生以上的成熟麻竹竹青部分的常温存储模量位于10 GPa数量级以上,一般能满足作为风力发电叶片复合材料中增强相材料的使用。而4年生以下毛竹的存储模量值有可能低于10 GPa,达不到风力发电机叶片复合材料对毛竹增强相的最低要求,一般不作为风力发电机叶片复合材料毛竹增强相使用。

The room-temperature storage modulus of Phyllostachys pubescens and Dendrocalamus latiflorus grown 3～4 years were first tested by a Q800 dynamic mechanical thermal analysis（DMA） instrument.Then the outer plies of culm walls of 2 bamboo species were assembled according to their ages and manufactured into boards.The specimens of the boards were tested on an INSTRON 5582 mechanical tester.The results demonstrated that the storage modulus of the outer plies of culm wall of 2 bamboo species increased with the increase of their age,meaning the more age and the more stiffness.On the other hand,the outer ply of culm wall of Dendrocalamus latiflorus grown 3 or more than 3 years is qualified as the reinforcement material of wind turbine blade composite because its storage modulus is in the rank of 10 GPa under room-temperature condition.But that of Phyllostachys pubescens grown less than 4 years is not enough for wind turbine blade composite for its low storage modulus,which is lower than 10 GPa,Accordingly,the later can not be used as the reinforcement material of wind turbine blade composite.