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研究损伤抑制带对损伤扩展的抑制机理以及损伤止裂效果对于提高结构强度和效率具有重要意义。采用渐进损伤分析方法和有限元模型分析了抑制带对蒙皮/筋条的损伤扩展的抑制情况和发生机理;讨论了损伤抑制带数量和其沿蒙皮厚度的分布等设计变量对结构剩余强度的影响。结果表明:0°损伤抑制带将蒙皮损伤抑制在缘条附近并维持一段加载历程,从而提高了复合材料加筋板的承载能力;蒙皮的失效应力随着0°损伤抑制带层数的增加而增加;对于相同数量的0°损伤抑制带,其沿着蒙皮厚度的不同分布对结构承载能力的影响很小。
It is of great significance to study the inhibition mechanism of damage suppression zone on damage expansion and the damage arrest effect for improving the structure strength and efficiency. Using the method of progressive damage analysis and the finite element model, the suppression and the mechanism of the suppression zone on the damage and extension of the skin / tendons are analyzed. The effects of the design variables such as the number of the damage zone and the distribution of the skin thickness on the structure residual strength Impact. The results show that the 0 ° damage suppression band restrains the skin damage near the edge and maintains a loading process, thus increasing the bearing capacity of the composite stiffened plate. The failure stress of the skin decreases with the 0 ° damage Increase and increase; for the same number of 0 ° damage inhibition zone, its distribution along the thickness of the skin has little effect on the bearing capacity of the structure.