关键词: 固体火箭发动机, 数字图像相关, 粘接界面, 多角度拉伸, 破坏模式

Abstract: In order to study the deformation characteristics and failure modes of rectangular adhesive specimens of solid rocked engine during multi-angle tensile process, the standard rectangular specimens were made according to QJ 2038.1A—2004. The tensile tests of specimens at 0°, 22.5°, 45°, 67.5° and 90° were carried out. The deformation field in the tensile process was measured by using the digital image correlation method, and the strain distribution was obtained. The deformation process and failure mode of specimen subjected to 45° tensile were analyzed. The results show that the strength of adhesive specimen is greatest at tensile angle of 0° while the elongation is greatest at tensile angle of 90°. When the interface is not debonded, the stress of adhesive specimen increases linearly with the increase in the external tensile strain, and after the interface is debonded, the stress starts to decrease. Deformation in the normal direction of the interface is more likely to lead to the debond of interface. The change of tensile angle causes the deformation of the key position of interface, resulting to the different failure modes of adhesive specimen.

Key words: solidrockedengine, digitalimagecorrelation, adhesiveinterface, multi-angletensile, damagemode