多层级蜂窝材料面内模量对孔壁弯曲的缺陷敏感性

复合材料学报, 2015, 32(5): 1445-1452. doi: 10.13801/j.cnki.fhc1xb.20141103.003

多层级蜂窝材料面内模量对孔壁弯曲的缺陷敏感性

1.大连理工大学工业装备结构分析国家重点实验室,大连,116024

2.大连理工大学工业装备结构分析国家重点实验室,大连,116024

3.北京宇航系统工程研究所,北京,100076

4.北京宇航系统工程研究所,北京,100076

基金项目: 高等学校学科创新引智计划(B14013) 国家"973"计划(2014CB049000, 2011CB610304) 中国博士后科学基金(2014M551070) 辽宁省高等学校优秀人才支持计划(LJQ2013005) 国家自然科学基金(11372062,91216201)

关键词：蜂窝材料 , 多层级结构 , 面内模量 , 孔壁弯曲 , 缺陷敏感性

Imperfection sensitivities of in-plane moduli of hierarchical lattice materials to cell edge waviness

Keywords： lattice material , hierarchical structure , in-plane moduli , cell edge waviness , imperfection sensitivity

为提升蜂窝材料的抗缺陷能力,在正六边形、Kagome和正三角形蜂窝材料的孔壁表面附着软材料层,制备了多层级蜂窝材料.然后针对孔壁弯曲缺陷类型,使用解析方法研究了蜂窝材料面内模量的缺陷敏感性和力学性能,并用数值模拟对理论值进行了验证.结果表明:通过选择合适的附着软材料层与几何参数,可使得多层级蜂窝材料比传统蜂窝材料对缺陷有更高的抵抗能力,表现出较低的缺陷敏感性.另外,在保持相对密度不变的前提下,多层级蜂窝材料的力学性能与传统蜂窝材料的相比也有较大提高.研究结论为设计制造具有抗缺陷能力的新型蜂窝材料提供了理论基础.

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