核厚对铝泡沫夹芯板抗弯性能的影响

研究了在4点弯曲工况下，铝泡沫核心/热塑性复合材料面层构成的夹芯板的核心厚度对变形机制的影响。通过全过程应力分析和观察，得出不同核厚下一系列的失效机制。各个样本厚度对应不同失效区域均可观察到高应变集中。相对薄的样本表面出现折皱和破裂现象，一些核也会碎裂，相对厚的样本的失效取决于核的凹陷。增加表面厚度可以避免核的凹陷，否则，可以观察到关键的核被剪碎。

Thermoplastic Sandwich Structure Design and Manufacturing for the Body Panel of Mass Transit Vehicle

Weight savings in vehicles enhances fuel efficiency and decreases maintenance costs, especially in mass transit systems. Lightweight composite materials, such as glass fiber reinforced polymers, have been used to replace traditional steel and aluminum components. In this paper, a mass transit bus side body panel was designed, analyzed, and manufactured using thermoplastic composite materials. The design featured a sandwich composite with E-glass fiber/polypropylene (glass/PP) face sheets and PP honeycomb co...