基于ABAQUS镀铝碳纤维编织格栅的拉伸性能

doi:10.19398/j.att.202009032

摘要/Abstract

摘要：

为探究镀铝碳纤维平纹编织格栅在大变形条件下的力学行为,采用试验与有限元模拟结合的方法,按照国标GB/T 1447—2005《纤维增强塑料拉伸性能试验方法》使用电子万能试验机对格栅试样进行拉伸性能测试;在Pro/E中建立格栅试样单胞模型,并导入有限元软件ABAQUS中对其进行拉伸模拟,通过试验数据验证仿真分析的有效性。结果表明:镀铝碳纤维平纹编织格栅具有高度非线性;经纬纱交织处容易产生应力集中,最易发生破坏失效;试验数值曲线与仿真数值曲线上升趋势一致且相差较小,验证了格栅模型仿真分析是可行的,为镀铝碳纤维编织格栅的设计及工程应用提供参考。

关键词: 镀铝碳纤维编织格栅, 拉伸性能, ABAQUS, 应力位移

Abstract:

In order to investigate the mechanical behavior of aluminized carbon fiber plain braided grid under the condition of large deformation, the tensile properties of the grid sample were tested by electronic universal testing machine through the method of experiment combined with finite element simulation according to GB/T 1447-2005 Fiber-reinforced plastics composites-Determination of tensile properties. A unit cell model of the grid sample was established in Pro/E and imported into the finite element software ABAQUS for the subsequent tensile simulation. The validity of the simulation analysis was verified by the test data. The results show that the aluminized carbon fiber plain braided grid is highly nonlinear. The intersections of warp and weft yarns are prone to stress concentration and even destruction and failure. The experimental numerical curve exhibited an upward trend, which was consistent with the simulation numerical curve, and the difference is small. Thus, the feasibility of the simulation analysis of the grid model was verified, providing reference for the design and engineering application of aluminized carbon fiber braided grid.

Key words: aluminized carbon fiber braided grid, tensile properties, ABAQUS, stress- displacement

中图分类号:

TB332

刘站, 李晶, 彭镇. 基于ABAQUS镀铝碳纤维编织格栅的拉伸性能[J]. 现代纺织技术, 2022, 30(1): 47-53.

LIU Zhan, LI Jing, PENG Zhen. Research on tensile performance of aluminized carbon fiber braided grid based on ABAQUS[J]. Advanced Textile Technology, 2022, 30(1): 47-53.

图/表 15

图1 镀铝碳纤维丝束

Fig.1 Aluminized carbon fiber tow

图2 镀铝碳纤维丝束截面图

Fig.2 Section diagram of aluminized carbon fiber tow

图3 碳纤维丝束截面

Fig.3 Cross section of carbon fiber tow

表1 编织格栅几何结构参数

Tab.1 Geometric structure parameters of braided grille

织物类型	纱线类型	间距/mm	宽度/mm	厚度/mm	拉伸强度/MPa
平纹	经纱	5	1.46	0.36	911.6
平纹	纬纱	5	1.46	0.36	911.6

图4 编织格栅结构

Fig.4 Braided grid construction

图5 格栅拉伸示意

Fig.5 Grid stretching diagram

表2 材料基本力学参数

Tab.2 Basic mechanical parameters of materials

材料	E₁/GPa	E₂/E₃/GPa	G₁₂/GPa	G₁₃/G₂₃/GPa	μ₁₂	μ₁₃/μ₂₃
碳纤维	230	14	9	5	0.25	0.30
铝膜	70	-	0.25	-	0.30	-

图6 格栅单胞模型

Fig.6 Grid cell model

图7 格栅单胞坐标示意

Fig.7 Coordinate diagram of grid cell

图8 格栅有限元模型

Fig.8 Grid finite element model

表3 格栅拉伸破坏载荷

Tab.3 Grid tensile failure load

试样编号	破坏载荷/N
1	1130.9
2	1036.0
3	1060.3
4	893.2
5	1106.0

图9 试样力-位移曲线

Fig.9 Force-displacement curves of specimens

图10 试样平均力-位移曲线

Fig.10 Average force-displacement curves of specimens

图11 格栅应力云图(单位:MPa)

Fig.11 Grid stress nephogram (unit: MPa)

图12 力-位移曲线对比

Fig.12 Force-displacement curve comparison

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