Dynamic Responses of Cellular Materials with Nonlinear Graded Cell Distribution Subjected to Impact Loading
HU Jun1, REN Jianwei1,2, WANG Aiguo3, WU Deyi1
1 Key Laboratory of Building Structure and Underground Engineering of Anhui, Anhui Jianzhu University, Hefei 230601 2 Multifunctional Lightweight Materials and Structure Research Center (MLMS), Nanjing University of Aeronautics and Astronautics, Nanjing 210016 3 Key Laboratory of Advanced Building Materials of Anhui Province, Anhui Jianzhu University, Hefei 230601
Abstract: According to the cellular distribution rule of honeycomb materials in nature, four honeycomb models were established to investigate the inf-luence of gradient cell distribution on the dynamic performance of honeycomb materials. The finite element analysis was employed to analyze the characteristics of deformation mode, bearing capability, strain-rate sensitivity and diffusion property of impact stress of diverse honeycomb materials under various impact loadings. The major results in this study can be concluded as follow. The initial crushing region of nonlinear graded honeycomb materials presented a dispersed distribution, other than a continuous distribution. The nonlinear graded honeycomb materials possessed a more homogenous densification process than conventional honeycomb materials. Besides, the nonlinear graded distribution of cells, endowed the honeycomb materials with the effect of framework effect, which resulted in improvement of densification strain and plateau stress by 10%—30%. Furthermore, the graded distribution of the frame also brought about 50% reduction of strain-rate sensitivity of the bulk honeycomb materials, showing a notable enhanced stability of the dynamic performances.
作者简介: 胡俊,安徽建筑大学,副教授,硕士研究生导师。2012年中国科学技术大学近代力学系工学博士毕业。近5年主持或参与多项国家级及省部级科研项目,发表数十篇学术论文,其中EI/SCI收录多篇。其主要科研方向为高程及大跨度结构抗震、材料动力学性能等;王爱国,安徽建筑大学,副教授,硕士研究生导师。2002年加入安徽建筑大学工作至今。2010年毕业于南京工业大学,获材料学博士学位。2017年于澳大利亚University of Southern Queensland, Centre for Future Materials作访问学者。Construction and Building Materials、Cement and Concrete Composites、《硅酸盐通报》、《材料导报》等学术期刊审稿人,中国建筑学会建筑材料分会化学激发胶凝材料专业委员会委员。主要研究方向为高性能水泥基材料/建筑功能材料/固体废弃物综合利用。
引用本文:
胡俊, 任建伟, 王爱国, 吴德义. 非线性梯度胞元分布蜂窝材料的冲击力学响应[J]. 材料导报, 2019, 33(24): 4066-4071.
HU Jun, REN Jianwei, WANG Aiguo, WU Deyi. Dynamic Responses of Cellular Materials with Nonlinear Graded Cell Distribution Subjected to Impact Loading. Materials Reports, 2019, 33(24): 4066-4071.
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2019, Vol. 33 
