复合材料修复带止裂孔裂纹钢板静强度实验

Experimental analysis of static strength of cracked steel plates with stop holes bonded by composite patches

研究了碳纤维复合材料胶接修复损伤舰船钢结构的修复效果,利用CTM系列微机控制电子万能试验机及配套的引伸计自动绘制试件的拉力-应变和拉力-位移曲线图,通过力-变形曲线得到试样的名义屈服载荷、胶层脱胶开裂时的极限载荷和试样断裂时的断裂载荷。结果显示:利用复合材料补片胶接修补受损钢板能有效恢复结构的静强度和承载能力;修补后结构的屈服载荷和极限载荷有明显提高,且随着补片厚度的增加而增加,但修补结构的断裂载荷没有改变。

This paper makes an experimental analysis of the static tensile strength of cracked steel plate with stop holes double-side adhesively bonded by composite patches. By using a CTM-series computer-controlled electronic universal testing machine and its relevant extensometer, it is possible to automatically plot a tensile-strain and force-displacement curve graph. The force-deformation curves can show the nominal yielding load, limited load in bondline debonding and the ultimate tensile load in specimen breaking. The testing results indicate that damaged steel plate bonded by composite patch can effectively recover its static strength and load-carryig capacity, that yielding load and limited load of patched structure can be significantly increased, and that the load-carrying capacity of the patched structure will increase with the thickness of the patch, but the breaking load of the patched structure is not changed.