采用欧拉杆屈曲模型,以端部约束系数μ定量表征夹层结构Z-pin端部结合程度,μ取值越小,Z-pin端部和面板结合程度越高,压缩载荷下更不易失稳.以不同参数K/X-cor结构的压缩试验为背景,分别研究了Z-pin直径和折弯长度对压缩试验性能的影响.通过显微观察并利用“混合法则”比较了Z-pin直径对K/X-cor结构的增强效率.从减重方面考虑,探讨了折弯长度对K-cor结构比强度和比刚度的影响,并得到最优折弯长度半解析表达式.结果表明:K-cor结构中Z-pin增强效率高且对结构损伤小,远优于X-cor结构;其比强度和比刚度随折弯长度的增加呈先增加后降低的趋势,不同参数的K-cor结构折弯长度存在最佳值.
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