Electrical insulation and dielectric properties of aramid fiber reinforced epoxy composites under mechanical stress

Y Wang, B Du, Y Chen, X Lin, X Kong - Composites Science and …, 2024 - Elsevier
In this work, an in-situ testing platform that could simultaneously apply high voltage (HV) and
mechanical stress has been established. The dielectric properties evolution of aramid fiber …

Combined effects of electrical and mechanical stresses on insulation breakdown—Part I: Tree growth of epoxy resin

B Du, W Zhang, H Liang - IEEE Transactions on Dielectrics and …, 2023 - ieeexplore.ieee.org
In this study, the treeing characteristics of epoxy resin were investigated by stressing the
sample parallel or vertically to the needle axis. Results show that tensile stress accelerates …

DBD plasma treatment of aramid fiber to improve dielectric property of fiber-reinforced composites for GIS insulation rod

B Du, R Xue, X Kong, Y Chen - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
In this article, aramid fiber surface is treated by dielectric barrier discharge (DBD) plasma,
and various aramid fiber reinforced epoxy composites (AFRCs) are prepared to investigate …

Combined effects of electrical and mechanical stresses on insulation breakdown—Part II: bursting breakdown of GIL insulator

B Du, Z Guo, H Liang - IEEE Transactions on Dielectrics and …, 2023 - ieeexplore.ieee.org
High voltage alternative current (HVAC) gas insulated transmission line (GIL) bears a strong
electric field and complex mechanical stresses during operation. As one of the main …

Polydopamine-enabled surface modification to improve the dielectric property of aramid fiber/epoxy composites for insulation rod

Y Chen, B Du, R Xue, Y **ng… - ACS Applied Polymer …, 2024 - ACS Publications
The poor interfacial adhesion between aramid fiber and epoxy resin is the main issue
affecting the dielectric properties of the aramid fiber-reinforced composite (AFRC). In this …

Improved dielectric and mechanical properties of aramid fiber reinforced epoxy resin composites by polyethyleneimine grafting

B Du, R Xue, X Kong, Y Chen - Journal of Physics D: Applied …, 2023 - iopscience.iop.org
In this paper, aramid fiber surface is modified by polyethylenimine (PEI) grafting with
abundant-NH 2 active groups after plasma surface activation treatment. Various aramid fiber …

Degradation mechanism for epoxy resins under combined electric, thermal and compressive stresses

G Shang, Y Sun, H Tang, X Li, S Zhang, J Li… - Polymer Degradation and …, 2024 - Elsevier
Epoxy resins are widely used in equipment such as ultra-high voltage dry-type bushings,
which are subjected to severe electric, thermal, and compressive stresses. Some physical …

Particle Aggregation State Affecting Insulation Breakdown Characteristics of Epoxy/Al2O3 Composite Under Temperature Gradient

J Li, Y Wang, Y Wang, Q Tang, P Song… - … on Dielectrics and …, 2023 - ieeexplore.ieee.org
Epoxy/Al2O3 composite is widely used in high-voltage gas insulation equipment and cable
terminals because of its excellent heat resistance, mechanical properties, and dimensional …

Electrical tree degradation of MgO/epoxy resin composites at different voltage frequencies

Y Zhang, W Lin, Y Zhou, W **ng, J Cheng… - High …, 2024 - Wiley Online Library
Electrical tree degradation is one of the main causes of insulation failure in high‐frequency
transformers. Electrical tree degradation is studied on pure epoxy resin (EP) and MgO/EP …

Characterization of Electrical Tree Degradation of Epoxy Resin under Thermal and Temperature Stresses by Photoelastic Effect

HH Aung, Y Wang, J Li, Y Zhang… - Chinese Journal of …, 2024 - ieeexplore.ieee.org
Epoxy resin is widely used in the support, insulation, and packaging components of
electrical equipment owing to their excellent insulation, thermal, and mechanical properties …