含通孔损伤复材壁板螺接修理接头拉伸性能试验研究

Tests on Tensile Strength of Bolted-Repaired Composite Joints

采用单向拉伸试验,测试了含通孔损伤的复合材料壁板和含通孔损伤的螺接修理接头壁板的单向拉伸强度,评估了含通孔损伤的复合材料壁板的螺接修理接头效果,研究了含通孔损伤对复合材料螺接修理接头的破坏载荷、破坏模式、应力分布的影响。试验结果表明:含通孔损伤的复合材料壁板及其修理板的典型破坏模式均为横向拉伸破坏;与无通孔板相比,含通孔损伤的螺接修理接头拉伸强度恢复率达到44.2%;应变读数表明,补片能够较好地缓解母板损伤孔边缘的受载,从而有效提高结构拉伸强度。

Uniaxial tensile test was used to test the unidirectional tensile strength of the composite plate with pen- etrating hole damage and the bolted-repaired joints plate containing the penetrating hole damage, and the bolted-repaired composite plate with the damage of the penetrating hole was evaluated. The effect of repair was analyzed, and the failure load, failure mode, and stress distribution of the bolted-repaired composite plate structure containing the damage of the pen- etrating hole were analyzed. The test results show that： The typical failure modes of the composite plate with penetrating hole damage and the bolted-repaired composite plate with penetrating hole damage are transverse tensile failures; compared with non penetrating hole damage plate, the recovery rate of tensile strength of the repair plate with penetrating hole dam- age reaches 44.2%; the strain readings indicate that the patch can be relieve the load at the edge of the damage hole of the plate, thereby increasing the tensile strength of the structure effectively.