风电叶片复合材料在三点弯曲过程中的声发射研究

发布时间：2018-02-10 22:36

本文关键词： 风电叶片玻璃纤维复合材料三点弯曲测试声发射力学性能　出处：《工程塑料应用》2016年04期 　论文类型：期刊论文

【摘要】：为研究风电叶片复合材料损伤破坏的声发射特性以及复合材料的力学性能,对含有纤维预断试件和无纤维预断的完好试件分别进行了三点弯曲力学性能试验,并在加载过程中采用声发射检测仪实时监测整个损伤破坏过程。对采集到的声发射信号处理分析,便可获得风电叶片复合材料的弯曲力学性能和损伤破坏的声发射特性。试验结果表明:玻璃纤维复合材料在弯曲载荷作用下出现典型的破坏特征包括纤维断裂、纤维/基体脱胶和纤维分层。纤维预断试件的声发射信号波形最高幅度达到2.5 V,频带分布在20~300 k Hz范围;无纤维预断试件的声发射信号波形最高幅度为0.07 V,频带分布在10~180 k Hz之间。
[Abstract]:In order to study the acoustic emission characteristics of wind turbine blade composites and the mechanical properties of the composites, three-point bending mechanical properties tests were carried out on the specimens with fiber prebreak and intact specimens without fiber prebreak, respectively. In the process of loading, the acoustic emission detector is used to monitor the whole damage and damage process in real time. The bending mechanical properties of wind turbine blade composites and the acoustic emission characteristics of damage and failure can be obtained. The experimental results show that the typical failure characteristics of glass fiber composites under bending load include fiber fracture. Fiber / matrix degumming and fiber delamination. The maximum amplitude of acoustic emission (AE) signal waveform of fiber prebreak specimen is 2.5 V, and the frequency band is in the range of 20 ~ 300kHz. The maximum amplitude of acoustic emission signal is 0.07 V and the frequency band is between 10 ~ 180 kHz.
【作者单位】：兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室;
【基金】：国家自然科学基金项目(51265025)
【分类号】：TB332

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