A5019592718- Ultrasonics and Acoustic Wave Propagation
- Mechanical Behavior of Composites
- Smart Materials for Construction
- Thermography and Photoacoustic Techniques
- Structural Health Monitoring Techniques
- Microstructure and mechanical properties
- Geophysical Methods and Applications
- Anomaly Detection Techniques and Applications
- Machine Fault Diagnosis Techniques
- Microstructure and Mechanical Properties of Steels
- Hydrogen embrittlement and corrosion behaviors in metals
- Infrastructure Maintenance and Monitoring
- Non-Destructive Testing Techniques
Northeast Petroleum University
2022-2023
Damage detection and the classification of carbon fiber-reinforced composites using non-destructive testing (NDT) techniques are great importance. This paper applies an acoustic emission (AE) technique to obtain AE data from three tensile damage tests determining fiber breakage, matrix cracking, delamination. article proposes a deep learning approach that combines state-of-the-art for time series classification: InceptionTime model with in composite materials. Raw frequency-domain sequence...
This study investigated the mechanism of delamination damage in double cantilever beam (DCB) standard test by use strain energy release rate. The curve rate was verified Rise Angle (RA) method. For this purpose, 24-layer carbon fiber/epoxy multidirectional laminates with interface orientations 0°, 30°, 45°, and 60° were fabricated according to ASTM D5528(13). In course test, acoustic emission (AE) used for real-time monitoring, combined micro visualization, composite studied at multiple...
Two mesomechanics models were analyzed in an attempt to reveal the relationship between stored energy and back stress. It has been indicated that portion of elastic due residual microstresses (ESR) is closely related intergranular stress (Xinter), dislocations inside grains (ESD) can be estimated with plastic work intragranular (Xintra). Then, evolution during cyclic loading was studied, (WpB) calculated low cycle fatigue experimental data Ti-6Al-4V. The result shows WpB partially released...
Abstract In this paper, the tensile damage mechanism of carbon fiber composites at high temperatures is analyzed. The acoustic emission technique was employed to monitor process specimens. signals and room were classified based on k -means wavelet packet energy spectrum. results show that mechanisms temperature differ. At temperatures, there more stress release, material instability appears earlier, redistribution occurs in specimen. include matrix cracking, fiber/matrix debonding, breakage....
This study investigates delamination damage mechanisms during the double cantilever beam standard test using strain energy release rate. The acoustic emission parameter is used to replace original calculation method of measuring crack length predict delamination. For this purpose, 24-layer glass/epoxy multidirectional specimens with different layups, and interface orientations 0°, 30°, 45°, 60°, were fabricated based on ASTM D5528 (2013). Acoustic testing (AE) detect mechanism composite...
Early-onset damage in composite materials consists matrix cracking with certain regularity distribution. However, the effect of spatial arrangement cracks and relationship between direction expansion incident ultrasound waves on nonlinear parameter detection is poorly understood. This study analyzes variation millimeter-scale micron-scale by experiment finite-element-based numerical calculation to improve evaluation provide a reference for crack prediction imaging. The results show that...
This study investigates delamination damage mechanisms during the double cantilever beam standard test using strain energy release rate. The acoustic emission parameter is used to replace original calculation method of measuring crack length predict delamination. For this purpose, 24-layer glass/epoxy multidirectional specimens with different layups, and interface orientations 0°, 30°, 45°, 60°, were fabricated based on ASTM D5528 (2013). Acoustic testing (AE) detect mechanism composite...