论文部分内容阅读
介绍了常温环境下和高温环境下蜂窝夹层结构埋件拉脱性能的试验和结果,对比分析了高温环境对埋件拉脱性能的影响。结果发现,埋件在受法向拉脱力时,高温环境中承载力下降为常温的8%左右,且失效模式也发生了变化,由常温的蜂窝芯剪切破坏变为面板与蜂窝芯脱粘破坏;埋件在受面内拉脱力时,常温环境和高温环境下埋件分别呈现出了两种典型的失效模式,常温环境中失效模式为面板压缩破坏,高温环境中失效模式为面板皱褶失稳破坏,且拉脱力降为常温的28%左右。
The experiments and results on the pull-off performance of embedded parts with honeycomb sandwich structure under normal temperature and at high temperature were introduced. The influence of high temperature environment on the pull-off performance of embedded parts was analyzed. The results show that the load-carrying capacity of the embedded parts in the normal direction drops to about 8% at normal temperature under the normal pull-off force, and the failure mode also changes. From the normal temperature, the honeycomb core shear failure becomes the debonding of the panel and the honeycomb core. When the embedment is subjected to pull-off force, two typical failure modes appear at normal temperature and high temperature, respectively. The failure mode at room temperature is the compression of the panel, and the failure mode at high temperature is the panel folds Destabilization damage, and pulling force reduced to about 28% of room temperature.