PBX材料蠕变性能的云纹干涉法实验研究

An Experimental Study on Creep Behavior of PBX using Moire Interferometry

本文利用云纹干涉法对PBX材料蠕变行为进行了研究。实验中采用圆盘试件进行压缩实验。利用圆盘对径受压实验间接拉伸的特点,测量了PBX材料的拉伸蠕变及蠕变恢复曲线,同时也得到了圆盘部分区域压缩蠕变及蠕变恢复曲线。实验中,观察到蠕变的阶段上升现象,这一现象不同于一般的纯的高聚物的蠕变变形。并针对这一蠕变现象利用破坏力学理论进行了初步分析。文中的实验现象及实验数据将为PBX材料蠕变破坏变形的进一步的理论分析提供科学依据。

Creep behavior of PBX material, which is a polymer matrix composite filled with large number of solid particles, is studied using moire-interferometry conabined with diametric disc test in this paper. Extensive creep deformation and creep recovery curve of PBX material are indirectly measured by the aid of compressive circular disk test. Compressive creep deformation and creep recovery curve of PBX material are also gained at the same time during the compressive circular disk test. The results show a different creep process compared with pure poly materials. The creep repeating increase stage of PBX material is observed, which is quite different from the typical creep curve of a pure high polymer. Moreover, this phenomenon is analyzed preliminary from damage mechanics. The experimental data obtained in this paper could offer the experimental basis on the theoretical analysis of the creep-damage of PBX material.