三维四向编织复合材料宏观有限元模型冲击损伤仿真及试验验证

谭焕成; 许善迎; 黄雄; 关玉璞; 陈伟

doi:10.13801/j.cnki.fhclxb.20170821.002

三维四向编织复合材料宏观有限元模型冲击损伤仿真及试验验证

1.
南京航空航天大学能源与动力学院江苏省航空动力系统重点试验室, 南京 210016;
2.
先进发动机协同创新中心, 北京 100191

基金项目: 国家自然科学基金（51475227；51575262）

详细信息

通讯作者:
陈伟,博士,教授,博士生导师,研究方向为材料结构冲击损伤,E-mail:chenwei@nuaa.edu.cn

中图分类号: TB332
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出版历程
- 收稿日期: 2017-05-10
- 修回日期: 2017-07-31
- 刊出日期: 2018-05-14

Macro-scale finite element model for impact damage simulation and experimental verification of three-dimensional four-directional braided composites

1.
Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
2.
Collaborative Innovation Center of Aero-Engine, Beijing 100191, China

摘要

摘要: 三维编织复合材料作为整体编织材料，能够克服层合复合材料层间强度低、易分层的缺陷，相对于金属材料，还具有质量轻、高比刚、高比强度以及良好的抗冲击性能、较高的损伤容限，在汽车、高铁、航海、航空及航天领域中具有广泛应用前景。使用空气炮发射系统开展了钢珠以约210 m/s速度冲击三维四向编织复合材料平板的不同位置试验，基于宏观观察和细观观测，分析了三维编织复合材料在受到钢珠高速冲击下的破坏模式和破坏机制。此外，本文建立了三维四向编织复合材料宏观连续介质损伤（CDM）有限元模型，其中模型计算剩余速度和试验测得剩余速度误差在5%以内，试验和数值模拟的破坏形貌也高度一致，验证了所建立的宏观CDM有限元模型的有效性。
- 三维编织复合材料 /
- 弹道冲击 /
- 宏观有限元模型 /
- 破坏模式 /
- 数值仿真
Abstract: With a distinct structure that is fully integrated, three-dimensional braided composites not only overcome the defects in laminated composites which have relatively poor mechanical properties in the thickness direction and are prone to interlaminar delamination, but also are superior in high strength-to-mass and stiffness-to-weight ratios, improved impact resistance and damage tolerance as compared with traditional metal materials. Owing to these merits, they also have broad potential applications in automobile, high-speed train, navigation, aviation, and aerospace industries. Plate specimens of three-dimensional four-directional braided composite(3D4DBCo) were designed and impacted at different locations by the steel ball with an approximate initial velocity of 210 m/s with the help of the air gun experiment system in this paper. On the basis of macroscopic and microscopic observation, the damage morphology and the failure mechanism of 3D4DBCo subjected to high speed impact of the steel balls were analyzed and summed up. What's more, the macro-level continuum damage mechanics (CDM) finite element model of 3D4DBCo was established, and the comparisons between numerical simulation and experiment results show highly agreement in residual velocity within 5%, as well as the damage characteristic, which validate the effectiveness of the macroscopic CDM finite element model.
- three-dimensional braided composites /
- ballistic impact /
- macroscopic finite element model /
- failure mode /
- numerical simulation

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