Benefiting from their outstanding specific strength, specific stiffness and designability, composite materials have been widely applied in high-end equipment fields such as aerospace, rail transit and automotive industry. Among various mechanical properties, compressive performance is a key indicator for evaluating the load-bearing capacity of composite structures. However, due to their characteristics including anisotropy and relatively low interlaminar strength, the accurate measurement of compressive performance has long been a key challenge and research priority in the field of material testing.

When designing for electrically sensitive or safety-critical applications, it is crucial to understand how materials behave when exposed to flame. The UL 94 flammability rating is a widely recognized benchmark for evaluating the flame-retardant properties of polymers and foams, yet navigating through the various tests, classifications and certification data can be a challenging task.

Batteries, fuel cells, and electrolyzers are of great significance for meeting our future energy supply demands. For these applications, it is imperative to fabricate sophisticated electrode layers. The preparation of electrode layers is similar to coating processes, which requires crack-free and inclusion-free homogeneous electrode layers as well as uniform coating thickness of the dried layers. Since the final formation of the network structure takes place during the drying step, the key focuses lie on the porosity and the local distribution (in-plane and cross-plane) of electrode components within the layers.

Uniaxial high-speed tensile tests were carried out on rod specimens of cast iron and cast aluminum at different strain rates to investigate their dynamic mechanical properties and fracture behaviors, and the effects of relevant factors on the tests were analyzed. The results show that: the methods for measuring strain and stress, the gauge length and grip section length of the specimens, and other factors exert a significant influence on the test accuracy and the oscillation degree of the curves; the test accuracy can be improved by using fixtures with high specific stiffness and specific strength, adopting specimens with short gauge length, measuring stress with strain gauges, measuring strain with two cameras, and appropriately increasing the length of the grip section.

The automotive industry is experiencing a sweeping trend of systematic transformation, where electrification, intelligence, and sharing are mutually reinforcing. Against this backdrop, the electrification transition of the industry is accelerating at a faster pace.

To reduce the environmental impact of automotive products, commit to environmental and resource protection as well as energy conservation, countries and regions around the world have successively formulated environmental laws and regulations, strengthened the management of end-of-life vehicle (ELV) recycling and utilization, improved the indicators for ELV recycling rates, effectively mitigated the environmental impact of end-of-life vehicles, and realized the sustainable growth of the automotive industry.

With the continuous improvement of requirements for electric vehicle (EV) driving range and charging efficiency, high-voltage platforms of 800V and above have become an industry development trend. After Porsche Taycan took the lead in commercializing the 800V architecture in 2020, major automakers including Hyundai, BYD, and Xpeng have followed suit with their respective layouts.

Research on Improving the Accuracy of Material Cards for Simulating the Deployment of Plastic Covers of Automotive Airbags. With the growing global attention to the environment and energy consumption, polymer materials including composite materials, engineering plastics, and rubber have been increasingly applied in automotive lightweight design due to their high strength-to-weight ratio.

Although polymer materials have only a history of over a hundred years since their advent, their rapid development and wide range of applications have made them one of the four basic materials of modern society, alongside steel, wood, and cement. Compared with other materials, polymer materials possess excellent molding and processing properties as well as mechanical strength, which are closely related to their special structure, molecular weight, and degree of molecular weight variation (molecular weight distribution).

The failure of general plastic-encapsulated devices can be divided into early failure and in-service failure. The former is mostly caused by quality defects resulting from design or process errors, which can be identified through routine electrical performance testing and screening. The latter is induced by potential defects of the devices; the behavior of these potential defects is related to time and stress. Experience has shown that failures caused by moisture absorption, corrosion, mechanical stress, electrical overstress (EOS), and electrostatic discharge (ESD) dominate.

The development of offshore and onshore low-wind-speed wind power has driven the rapid increase in the length and root diameter of wind turbine blades, accompanied by the emergence of crazing issues in the infusion process of ultra-large blade roots.

The long-term service reliability of structural materials and components in high-temperature environments is one of the core challenges in the design of high-end equipment such as aerospace and energy power systems. Among them, creep—a phenomenon where materials undergo continuous deformation over time under constant stress and high temperature—is the key mechanical behavior that limits their service life and safety.