一项关于T800碳纤维/环氧复合材料在飞机内剪切下使用声辐射和数字图像相关性损伤的研究
Zikai Lin1, Changheng Shi2, Xiaochu Huang1
1Shenzhong Link Management Center, Zhongshan 528400, China.
Polymers
|November 14, 2023
概括
这项研究使用拉伸试验测量了T800碳纤维/环氧复合材料的飞机内切削模量. 声辐射分析确定了三种不同的损伤模式,揭示了对剪切负荷下的复合材料行为的关键见解.
科学领域:
- 材料科学 材料科学 材料科学
- 复合材料工程 复合材料工程
- 机械工程 机械工程
背景情况:
- 平面内切削模块对于复合材料的表征至关重要,它补充了标准的拉力和压力测试.
- 对±45°复合板材的拉力测试提供了一种经济的方法来确定平面内切削强度.
- 了解剪切下复合材料的损伤机制对于预测结构完整性至关重要.
研究的目的:
- 测量T800碳纤维/环氧复合材料的飞机内切削模量.
- 用声辐射 (AE) 来描述在飞机内切削负荷下层层损伤的特征.
- 识别和分析不同的损伤模式及其演变.
主要方法:
- 对±45°T800碳纤维/环氧层材进行拉伸测试,以确定内平面剪切模量.
- 利用声辐射 (AE) 监测和描述损害的发起和传播.
- 将因子分析 (FA) 应用于损伤模式分类和聚类的AE参数.
- 分析累积的AE命中,以追踪损坏模式的发展和演变.
主要成果:
- 平均飞机内切削模量确定为5.42 GPa,最大承载能力为17.54 kN.
- 确定了三种主要损伤模式:矩阵裂,分层/接口解和纤维断裂.
- 对AE特征参数分析表明损伤能量低 (低于2000 mV × ms) 和频率分散 (150-350 kHz).
结论:
- 对±45°分层材料的拉伸测试对于测量复合材料的内平面剪切模量是有效的.
- 声学发射,加上因子分析,成功地区分和描述了在剪切下复合损伤模式.
- 该研究提供了对T800碳纤维/环氧复合材料的飞机内剪切行为和故障机制的全面了解.
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