Properties and damage evolution of open-hole carbon fiber-reinforced composite laminates without/with MWCNTs during tensile damage were monitored by a complementary technology combining acoustic emission, digital image correlation and finite elements analysis. Meanwhile, the AE signals can be post-processed by fuzzy C-Means. It was concluded that adding amount of MWCNTs can reduce the stress concentration, improve the strength and fracture interface stiffness of laminate specimens and prevent the evolution of micro-cracks. The AE signals are concentrated in three areas: 23-74 kHz (matrix cracking), 82-120 kHz (fiber pull-out and delamination), 120-190 kHz (fiber breakage), respectively. An enhancement of properties of materials is obtained correspondingly due to the addition of MWCNTs into matrix. The number and amplitude of AE signals corresponding to matrix cracking produced by the specimen without MWCNTs are much larger than that of the specimen with MWCNTs, indicating that the damage degree of matrix cracking for the specimen without MWCNTs is more serious. The properties and damage evolution of composites can be studied from experimental research and numerical simulation, respectively.

通过结合声发射，数字图像相关性和有限元分析的补充技术，可以监测无/有MWCNT的无孔碳纤维增强复合材料层压板的性能和损伤演变。同时，可以通过模糊C均值对AE信号进行后处理。结论是，添加多壁碳纳米管可以降低应力集中，提高层压材料的强度和断裂界面刚度，并防止微裂纹的产生。AE信号集中在三个区域：分别为23-74 kHz（矩阵开裂），82-120 kHz（光纤拉出和分层），120-190 kHz（光纤断裂）。通过将MWCNT添加到基质中，相应地获得了材料性能的增强。与不带碳纳米管的样品相比，与不带碳纳米管的样品产生的基体开裂对应的声发射信号的数量和幅度要大得多，这表明不带碳纳米管的样品对基体开裂的破坏程度更为严重。复合材料的性能和损伤演化可以分别通过实验研究和数值模拟来研究。