摘 要：利用动态力学热分析技术（DMTA）测试了粘弹性阻尼材料在与复合材料共固化前后的动态力学性能，并利用有限元分析方法考察了复合材料共固化、粘弹性阻尼层的厚度以及复合材料柔性层对共固化复合材料的阻尼特征的影响。结果表明，复合材料共固化过程中由于树脂渗透等原因，共固化复合材料的阻尼峰值仅为理想状态的54％左右且阻尼峰值所对应的温度向高温方向移动；增加粘弹性阻尼层的厚度以及在阻尼层附近插入柔性层不仅可以提高粘弹阻尼层共固化复合材料的阻尼峰值，而且可拓宽共固化复合材料的阻尼温域。
Abstract: The dynamic mechanical properties of viscoelastic material embedded in composites and that co-cured with composites was investigated by dynamic mechanical thermal analysis (DMTA). The effects of co-curing process, the thickness of viscoelastic layer and the composite flexible layer on the damping characteristic of co-cured composites was studied by finite element method. The results show that, the value of damping crest is 54% of idealized value due to the interaction of the resin and the embedded viscoelastic material during the process of co-curing. Increasing the thickness of the embedded viscoelastic layer or inserting some flexible layers near the viscoelastic layer not only results in the increasing the value of damping crest of co-cured composites but also can widen the temperature range of damping in co-cured composites.
PDF(1163 KB)
