Deformation of Carbon Fiber Laminates underExplosion Based on 3D-DIC
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摘要: 针对3种不同铺层的碳纤维复合材料层合板，设计了开放式爆炸加载实验，研究不同的炸药质量和爆炸距离下层合板的动态力学行为。基于两台高速相机，搭建了高速三维变形场的实验测量系统，记录层合板在爆炸作用下动态变形过程。通过三维数字图像相关方法（3D-DIC）软件计算得到层合板在冲击波作用下的动态位移场和应变场。研究发现：层合板在弱冲击波作用下只发生弹性变形，正交铺层和准均质铺层均表现出良好的抗冲击能力；在强冲击波作用下层合板会产生分层、基体开裂、纤维断裂等形式的损伤，铺层顺序对损伤形式有很大影响。
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关键词:
- 碳纤维层合板 /
- 三维数字图像相关方法 /
- 爆炸 /
- 损伤 /
- 破坏
Abstract: An open explosion loading experiment was designed for three differently laminated carbon fiber composite laminates to study the dynamic mechanical behavior of the laminates under different explosive masses and explosive distances. Based on two high-speed cameras, an experimental measurement system for high-speed three-dimensional deformation field was built, and the images of the dynamic deformation process of the laminates under the action of the explosion were recorded. The dynamic displacement field and strain field of the laminates under the shock wave were calculated by 3D-DIC software. The results show that the laminates only undergo elastic deformation under low shock wave, and the orthogonal layer and the quasi-homogeneous layer have good impact resistance; under the action of high shock wave, the laminates will cause damage in the form of delamination, matrix cracking, fiber breakage, etc. The order of the layup has a great influence on the form of damage.-
Key words:
- carbon fiber reinforced laminate /
- 3D-DIC /
- blasting loading /
- damage /
- failure
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图 8 B、C型板中心点最大主应变随时间变化的曲线
Figure 8. Curve of maximum principal strain over time at the center point of plates B and C
图 9 B型和C型板所选曲线的位移变化对比
Figure 9. Comparison of displacement changes of selected curves from plates B and C
表 1 碳纤维层合板铺层方式
Table 1. Lamination of carbon fiber laminates
Material type Laying method Thickness/mm A [0°]24 3.00 B [0°/90°/45°/–45°/–45°/45°/90°/0°]3 3.00 C [45°/0°/–45°/90°/90°/–45°/0°/45°]3 3.00 
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表 2 复合材料单层板的弹性力学参数
Table 2. Elastic parameters of composite laminates
E11/GPa E22/GPa E33/GPa G12/GPa G13/GPa G23/GPa ${\upsilon _{12}}$ ${\upsilon _{13}}$ ${\upsilon _{23}}$ 131.00 10.20 10.20 6.30 6.30 3.91 0.25 0.25 0.38
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表 3 不同类型的层合板实验参数
Table 3. Experimental parameters of different types of laminates
Test No. Laminate type Explosive mass/g Explosion distance/mm 1 A 20 350 2 B 20 350 3 B 35 210 4 C 20 350 5 C 20 100
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表 4 层合板宏观损伤情况
Table 4. Macroscopic damage of the laminates
Test No. Macroscopic form of destruction 1 2 penetrating cracks and 5 obvious cracks 2 No visible crack 4 No visible crack
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