采用声发射技术对扭转加载作用下金属/玻璃纤维复合材料柱壳试件的破坏损伤全过程进行实时监测,通过实验方法与数值分析共同研究螺栓以及壳体尺寸对柱壳试件胶接接头损伤破坏的扭转特性及其声发射响应特征的影响.结果表明,柱壳试件的扭转加载曲线基本表现为线性,主要的失效模式为内聚破坏且伴随着纤维断裂和基体开裂.增大螺栓直径,能有效增强金属/玻璃纤维复合材料柱壳的抗扭性能.柱壳试件的损伤破坏与其声发射信号的相关参数相对应,较大螺栓直径的柱壳试件损伤破坏对应着较高的声发射幅度、相对能量、持续时间和较多的撞击累计数.因此,可将声发射信号的动态变化特征作为风电叶片叶根结构安全评估的重要依据.
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