Jiang Peng, Liu Xiaodong, Li Wei, Guo Fuping, Hong Chuan, Liu Yubin, Yang Chang
College of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China.
College of Mechanical and Electrical Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China.
Materials (Basel). 2022 Jul 8;15(14):4783. doi: 10.3390/ma15144783.
This study characterized the damage characteristics of carbon fiber composite pressure vessels by the modal acoustic emission (MAE) method. The study showed how to use the extracted damage modal features and established MAE parameters to determine the damage mode of composite pressure vessels. First, the A and S Lamb modes of the AE signal were split through mode separation, and the time window was selected to establish the MAE characteristic parameters. Subsequently, based on the MAE parameters and the damage mode characteristics established from single damage experiments, a damage mode discrimination method was established. A bending test of carbon fiber composite laminates proved that the modal separation method and the MAE parameters establishment are reasonable and effective. The results from the hydraulic test of the graded loading performed on 20 MPa carbon fiber composite pressure vessels showed the accuracy of the damage mode discrimination method, and the damage state of the pressure vessel could be analyzed using the fiber fracture damage threshold according to the MAE parameters.
本研究采用模态声发射（MAE）方法表征了碳纤维复合材料压力容器的损伤特性。该研究展示了如何利用提取的损伤模态特征和建立的MAE参数来确定复合材料压力容器的损伤模式。首先，通过模式分离将声发射信号的A和S兰姆波模式分离，并选择时间窗来建立MAE特征参数。随后，基于MAE参数和单损伤实验建立的损伤模式特征，建立了一种损伤模式判别方法。碳纤维复合材料层合板的弯曲试验证明了模式分离方法和MAE参数建立的合理性和有效性。对20MPa碳纤维复合材料压力容器进行分级加载水压试验的结果表明了损伤模式判别方法的准确性，并且可以根据MAE参数利用纤维断裂损伤阈值来分析压力容器的损伤状态。
