SiC/Al双连通复合装甲材料抗侵彻性能宏-微观跨尺度模拟

doi:10.15541/jim20160391

摘要/Abstract

摘要：

SiC/Al双连通复合装甲材料所具有的复杂三维微结构特征对其宏观抗侵彻性能具有重要影响。本文建立了从宏观靶试模型中SiC/Al靶板的典型微区提取动态边界条件, 并作用于相应微观组织模型的跨尺度数值模拟方法, 研究了SiC/Al靶板在抗侵彻过程中不同典型局部微区内的动态微结构损伤及失效过程。研究表明: 在弹着点正下方位置, 多个裂纹源萌生于两相界面处靠近陶瓷相一侧, 随后沿与弹道平行的方向扩展并形成轴向主裂纹; 在与弹体轴线呈45°位置, 裂纹除了在靠近界面处的陶瓷相一侧萌生外, 在陶瓷相内部也出现了与弹道方向垂直的多条水平裂纹, 界面裂纹与水平裂纹进一步扩展并桥连成多个锥形主裂纹。相关模拟方法为将来该类材料的微结构优化提供了一种新的技术途径。

关键词: SiC/Al双连通复合材料, 宏-微观跨尺度模拟, 动态损伤及失效过程

Abstract:

Since the macro anti-penetration performance of interpenetrating SiC/Al composite is controlled mainly by the complex three-dimensional microstructure features. Muti-scale simulation of SiC/Al composite under impact loading was performed by using a macro-micro method. The simulation for macro SiC/Al composite armor plate under impact loading was employed first, then the dynamic boundary conditions from the typical local regions in SiC/Al composite were obtained and applied on its microstructural finite element model as a loading condition to analyze the dynamic damage and failure process in the typical local regions. The results revealed that, in the local region right below the impact point, the cracks initiated mainly near the SiC/Al interface, just on the side of the SiC ceramic phase, then continuously propagated parallel to the direction of the bullet axis and eventually converged together to form axial main cracks. Meanwhile, in the region at a 45º angle to the direction of bullet axis, the cracks initiated not only near the SiC/Al interface but also inside the ceramic phase. Subsequently, these cracks propagated, bridged and finally formed cone main cracks. This simulation method provides a feasible technical approach for microstructure topology optimization of the material.

Key words: interpenetrating SiC/Al composites, macro-micro multi-scale simulation, dynamic damage and failure process

中图分类号:

TB333

李国举, 范群波, 王扬卫, 史然. SiC/Al双连通复合装甲材料抗侵彻性能宏-微观跨尺度模拟[J]. 无机材料学报, 2017, 32(4): 425-430.

LI Guo-Ju, FAN Qun-Bo, WANG Yang-Wei, SHI Ran. Multi-scale Simulation of Interpenetrating SiC/Al Composite Armor Materials Subjected to Impact Loading Using a Macro-micro Approach[J]. Journal of Inorganic Materials, 2017, 32(4): 425-430.

图/表 13

图1 宏观靶试1/4有限元模型

Fig. 1 Macro 1/4 finite element model under impact loading

图2 SiC多孔陶瓷预制体样品CT扫描及重构过程

Fig. 2 Process of micro-CT scanning and reconstruction of SiC skeleton

图3 Micro-CT三维断层图像二值化处理示意图

Fig. 3 Schematic of binarization process of Micro-CT slice images(a) Unprocessed Micro-CT slice image; (b) Processed Micro-CT slice image

图4 基于Simpleware生成SiC/Al 双连通复合装甲材料三维微观组织模型构建过程

Fig. 4 Process of reconstruction of 3D microstructure model for SiC/Al composite using Simpleware software(a) Binary micro-CT slice images of SiC skeleton; (b) 3D microstructure model of SiC skeleton; (c) 3D microstructure model of Al phase; (d) 3D microstructure model of SiC/Al composite

图5 SiC/Al 双连通复合材料微观组织有限元模型

Fig. 5 3D finite element microstructure model of SiC/Al composite

图6 跨尺度有限元模拟示意图

Fig. 6 Schematic of multi-scale simulation(a) Macro finite element model for SiC/Al composite armor under impact loading, (b) local 3D model and (c) 3D microstructure finite element model

图7 SiC/Al双连通复合装甲材料抗侵彻损伤云图

Fig. 7 Damage contour of SiC/Al armor composite

图8 靶试试验后的SiC/Al双连通复合装甲材料SEM照片

Fig. 8 SEM image of SiC/Al composite after target test

图9 SiC/Al双连通复合装甲材料三维微观组织模型

Fig. 9 3D microstructure model of SiC/Al composite(a) Schematic of the vertical cutting site and (b) cross-section after cutting

图10 裂纹在界面处的萌生过程

Fig. 10 Initiation process of crack near the interface of SiC and Al phases(a) t=2.5 μs; (b) t=3.5 μs

图11 轴向主裂纹的形成过程

Fig. 11 Formation process of axial cracks(a) t=4.0 μs; (b) t=6.0 μs; (c) t=6.5 μs; (d) t=8.5 μs

图12 裂纹绕界面的扩展过程

Fig. 12 Propagation process of crack along the interface of SiC and Al phases(a) t=4.5 μs; (b) t=7.0 μs

图13 锥状裂纹的形成过程

Fig. 13 Formation process of the cone cracks(a) t=7.5 μs; (b) t=8.0 μs; (c) t=9.0 μs; (d) t=11.0 μs

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