金属/复合材料柱壳胶接头扭转声发射行为

复合材料科学与工程 ›› 2015, Vol. 0 ›› Issue (5): 33-37.

金属/复合材料柱壳胶接头扭转声发射行为

庞艳荣, 刘然, 周伟^*, 龚婧

河北大学质量技术监督学院,河北保定 071002

出版日期:2015-05-28 发布日期:2021-09-13
通讯作者: 周伟(1980-),男,博士,副教授,主要从事复合材料实验力学及声学无损检测研究,zhouweihy@126.com。
作者简介:庞艳荣(1963-),女,硕士,副教授,主要从事声学、电信号分析研究。
基金资助:
河北省自然科学基金(E2012201084);国家级大学生创新创业训练计划(2014100750004)

ACOUSTIC EMMISION BEHAVIOR FOR ADHESIVE JOINTS OF METAL/GFRP CYLINDER-SHELL UNDER TORSION TEST

PANG Yan-rong, LIU Ran, ZHOU Wei^*, GONG Jing

College of Quality and Technology Supervision, Hebei University, Baoding 071002, China

Online:2015-05-28 Published:2021-09-13

摘要/Abstract

摘要： 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。

关键词: 风电叶片, 柱壳, 扭转, 声发射

Abstract: Acoustic emission (AE) testing technology was used to monitor the process of damage and failure of metal/GFRP cylinder-shell specimen under torsion test in real time. By experiment and numerical simulation, the effect of sizes of bolt and shell on torsional properties of adhesive joint of metal/GFRP cylinder-shell specimen and corresponding AE characteristics were studied. The results show that the load-time curve of cylinder-shell specimen is basically linear. It is found that cohesive failure is the dominant failure mode with fiber break and matrix crack. Increasing the diameter of bolt can effectively improve the torsional properties of metal/GFRP cylinder-shell. Besides, AE parameters are related to the damage and failure process. Higher AE amplitude, relative energy, during time and more cumulative hits are connected with the damage process of specimen with longer bolt diameter. Therefore, dynamic characteristics of AE signals can provide evidences for security evaluation of wind turbine blades roots.

Key words: wind turbine blade, cylinder-shell, torsion, acoustic emission

中图分类号:

TB332

庞艳荣, 刘然, 周伟, 龚婧. 金属/复合材料柱壳胶接头扭转声发射行为[J]. 复合材料科学与工程, 2015, 0(5): 33-37.

PANG Yan-rong, LIU Ran, ZHOU Wei, GONG Jing. ACOUSTIC EMMISION BEHAVIOR FOR ADHESIVE JOINTS OF METAL/GFRP CYLINDER-SHELL UNDER TORSION TEST[J]. COMPOSITES SCIENCE AND ENGINEERING, 2015, 0(5): 33-37.

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