Investigation of mechanical behavior and damage of three-dimensional braided carbon fiber composites

• Published in: Materials research express Vol. 6; no. 8; pp. 85624 - 85638
• Main Authors: Zhou, Wei, Han, Kang-Ning, Qin, Reng, Zhang, Yan-Jing
• Format: Journal Article
• Language: English
• Published: IOP Publishing 31.05.2019
• Subjects: cluster analysis; DIC; IRT; three-dimensional braided carbon fiber composites
• ISSN: 2053-1591; 2053-1591
• DOI: 10.1088/2053-1591/ab23e0

Mechanical behavior and damage evolution of three-dimensional braided carbon fiber composites with various volume fractions during tensile process were monitored by three techniques including acoustic emission (AE), digital image correlation (DIC) and infrared thermography (IRT). Furthermore, the k-means algorithm was used to post-process the AE signals. The results indicated that the AE signals can be divided into three clusters (matrix cracking, fiber/matrix debonding, fiber breakage). With the increase of volume fractions, the displacement fields in the loading direction show a downward trend under the same increment of tensile load, the maximum temperature of failure increases slightly. The complementary technology can study the damage process from three aspects of sound, light and heat, respectively.