增材制造曲边蜂窝结构的力学行为和吸能特性
PDF下载 (323)郎晓明,陈斐洋,阮班超,王永刚.增材制造曲边蜂窝结构的力学行为和吸能特性[J].宁波大学学报(理工版),2023,36(6):17-23.DOI:10.20098/j.cnki.1001-5132.2022.1107
LANG Xiaoming,CHEN Feiyang,RUAN Banchao,WANG Yonggang.Mechanical behavior and energy absorption characteristics of additively manufactured curved edge honeycomb structure[J].Journal of Ningbo University(Natural Science & Engineering Edition),2023,36(6):17-23.DOI:10.20098/j.cnki.1001-5132.2022.1107
| Title: | Mechanical behavior and energy absorption characteristics of additively manufactured curved edge honeycomb structure |
| 作者: | 郎晓明, 陈斐洋, 阮班超, 王永刚 |
| Author(s): | LANG Xiaoming, CHEN Feiyang, RUAN Banchao, WANG Yonggang |
| 关键词: | 蜂窝结构; GP1不锈钢; 金属增材制造; 力学行为; 吸能 |
| Keywords: | honeycomb structure; GP1 stainless steel; metal additive manufacturing technology; mechanical behavior; energy absorption |
| 分类号: | O347.4 |
| DOI: | 10.20098/j.cnki.1001-5132.2022.1107 |
| 文献标识码: | A |
| 摘要: | 针对直边蜂窝结构进行优化, 提出了一种S形曲边蜂窝结构. 基于激光选区熔化增材制造技术, 以GP1不锈钢为基材, 制备了直边和曲边蜂窝结构, 实验结合有限元计算模拟研究曲边蜂窝结构的力学响应、变形模式和吸能特性, 并讨论了加载应变速率和相对密度的影响规律. 结果表明 (1)S形曲边蜂窝结构的载荷—位移曲线出现2次平台区, 其原因是S形曲边蜂窝结构出现从六角变形模式向四角变形模式的转变; (2)在相同体积条件下, 相比直边蜂窝结构, S形曲边蜂窝结构的吸收总能量和吸能有效率均得到一定提升; (3)随着加载应变速率增大, S形曲边蜂窝结构二次平台载荷均增大, 第2次平台载荷对加载应变速率更为敏感, 同时还发现加载应变速率不影响S形曲边蜂窝结构的变形模式; (4)随着相对密度的增加, S形曲边蜂窝结构二次平台载荷均呈线性增长, 压实临界位移量减小. |
| Abstract: | An S-shaped curved honeycomb structure is proposed to optimize the straight edge honeycomb structure. Based on laser selective melting additive manufacturing technology, straight edge and curved edge honeycomb structures were prepared with GP1 stainless steel as the base material. Quasi static compression properties were carried out. Combined with finite element simulation, the mechanical response, deformation mode and energy absorption characteristics of curved edge honeycomb structures were studied, and the effects of loading strain rate and relative density were discussed. The results show that (1) The load displacement curve of S-shaped curved edge honeycomb structure has a plateau area twice, which is due to the transformation of S-shaped curved edge honeycomb structure from hexagonal deformation mode to quadrangular deformation mode; (2) Under the same volume condition, compared with the straight edge honeycomb structure, the total energy absorption and energy absorption efficiency of the S-shaped curved edge honeycomb structure are improved to some extent; (3)With the increase of the loading strain rate, the secondary platform load of the S-shaped curved edge honeycomb structure increases, and the second platform load is more sensitive to the loading strain rate. At the same time, it is found that the loading strain rate does not affect the deformation mode of the S-shaped curved edge honeycomb structure; (4) With the increase of relative density, the secondary platform load of S-shaped curved edge honeycomb structure increases linearly, and the compaction critical displacement decreases. |
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| 备注/Memo: | 收稿日期:2022-11-09.宁波大学学报（理工版）网址:http://journallg.nbu.edu.cn/ 基金项目:国家自然科学基金（11972202）;宁波市重点研发项目（2022Z188）. 第一作者:郎晓明（1992－）,男,浙江舟山人,硕士,主要研究方向:桥梁建设.E-mail:zsdqjs_gov@foxmail.com *通信作者:王永刚（1976－）,男,江苏涟水人,博士/教授,主要研究方向:工程力学.E-mail:wangyonggang@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
