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Li-rich Mn-based materials have received extensive attention in the field of energy storage due to their unparalleled high energy density. In view of the poor rate performance and cycle stability...

Choosing a suitable bending structure is an important way to optimize flexible AMOLED. In this article, we proposed and established a drop‐shape model through nonlinear finite element analysis software, comparing it with the “U”‐shaped bending model. The mechanical stress conditions under different bending radius are analyzed and compared. Aiming to find a better module folding track, we output the influence of the bending radius on the stress and strain of the device layer, so that these data and research can provide reliable support for future material selection and structural optimization. The super‐elastic and viscoelastic behaviors of optically clear adhesive are described by polynomial reduced integral and Prony series model, respectively. Both U‐shaped various layers of film and overall flexible screen module strains increase fast with the decreasing of bending radius and smaller radius will increase the fatigue damage risk. The stress and strain of the drop shape did not change significantly with the decrease of the radius. During the bending process, the most stressed part appears in the outermost TP layer. In a small radius, it can be optimized from a curved structure, and water drop and wedge shapes can be prioritized.

The interplay between inertia and gravity is examined for a filament jet flow. The velocity is imposed at the tube exit and jet tip downstream. Both linear and nonlinear stability analyses are carried out. The loss of stability coincides with the onset of a Hopf bifurcation. While both inertia and gravity enhance the stability of steady flow, inertia plays a more dominant role regarding critical parameters. In contrast, the disturbance frequency is more sensitive to the effect of gravity. Above criticality, finite-amplitude disturbances are amplified, and sustained oscillation is achieved. It is found that the growth rate increases with velocity ratio, but decreases with inertia and gravity, which suggests that initial transients tend to take longer to die out for a fluid with stronger inertia and gravity. Transient postcritical calculations show that the nonlinearity can be effectively halted by inertia and gravity. The oscillation frequency ͑jet radius͒ decreases ͑increases͒ with velocity ratio. However, the jet oscillates more frequently but less fiercely with stronger inertia and gravity effects. The rupture of the jet is also examined, and is found to be delayed by inertia and gravity. Although the oscillation amplitude is found to be weakest at the jet tip, it is at this location that the jet tends to rupture first. Finally, comparison is carried out between theory and experiment, leading to good agreement.

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