平纹编织C/SiC复合材料低速冲击数值模拟

杨扬; 徐绯; 张岳青; 汤忠斌

doi:10.11883/1001-1455(2015)01-0022-07

平纹编织C/SiC复合材料低速冲击数值模拟

doi: 10.11883/1001-1455(2015)01-0022-07

杨扬^{1, 2,},
徐绯¹,
张岳青¹,
汤忠斌¹

1.
西北工业大学航空学院结构工程系，陕西西安 710072
2.
北京理工大学爆炸科学与技术国家重点实验室，北京 100081

基金项目: 国家自然科学基金重点项目(90916027);北京理工大学爆炸科学与技术国家重点实验室开放基金项目(KFJJ12-14M)

详细信息

作者简介:
杨扬(1986—), 男, 博士研究生, nwpu_yang@mail.nwpu.edu.cn

中图分类号: O347.3
计量
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- 被引次数: 0
出版历程
- 收稿日期: 2014-01-16
- 修回日期: 2014-05-19
- 刊出日期: 2015-01-25

Numerical simulation on low-speed impact response of 2D plain-woven C/SiC composite

1.
School of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China
2.
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

摘要

摘要: 首先，基于空气炮装置进行了2D-C/SiC薄板在冲击速度为79~219 m/s范围内的低速冲击实验，对碎片云团发展过程进行高速摄影记录；其次，基于Autodyn软件正交各向异性复合材料模型，推导2D-C/SiC材料相关参数；选取SPH求解器建立二维计算模型，对实验工况进行数值模拟，并基于碎片云结构、B扫描检测结果和碎片云轴向发展速度验证了该模型可以很好地描述C/SiC材料在冲击载荷作用下的脆性特征和软化行为。最后，基于数值模拟结果推导得出了钢弹丸冲击C/SiC材料的极限侵彻深度预测公式。
- 固体力学 /
- C/SiC材料冲击特性 /
- SPH /
- 热防护结构 /
- 碎片云 /
- 高速摄影
Abstract: First, the experiments that the steel balls impact to 2D-C/SiC composite under velocity of 79~ 219 m/s are investigated by using the air gun. Second, material parameters of 2D-C/SiC are obtained based on an orthotropic constitutive material model in Autodyn, and numerical simulation corresponding to experimental conditions are conducted based on smooth particle hydrodynamics(SPH) solver. The comparisons between the calculation results and experimental data of the debris cloud structure, the B scan results and the axis velocity of debris cloudvalidate the ability of this model for describing the brittle characteristics and the softening behaviour of 2D-C/SiC under impact load. Finally, the limit penetration depth of 2D-C/SiC under the impact of steel ball is predicted.
- solid mechanics /
- impact resistance of C/SiC /
- smooth particle hydrodynamics /
- thermal protection structure /
- debris cloud /
- high-speed photography

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图 1 碎片云团发展过程

Figure 1. Expansion of the debris cloud

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图 2 Autodyn计算模型

Figure 2. Computational model in Autodyn

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图 3 试样8计算结果

Figure 3. Simulation results of sample 8

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图 4 B扫描结果与模拟结果对比图

Figure 4. Comparison between B-scan and simulation results

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图 5 不同冲击速度下特征点轴向速度历程

Figure 5. Axial velocity histories under different impact velocities

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图 6 特征点轴向速度对比结果

Figure 6. Comparison of the axial velocities of simulation and experiment

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图 7 剩余速度随冲击速度与靶板厚度的变化规律

Figure 7. Variation of the residual velocity with impact velocity and plate thickness

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图 8 不同厚度靶板剩余速度变化图

Figure 8. Variation of residual velocity with impact velocity for different plate thicknesses

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表 1 低速冲击实验计划

Table 1. Low-speed impact experimental scheme

实验编号	D/mm	v_p/(m·s^-1)	E/J	实验结果
1	5	79.0	1.61	未穿透
2	5	92.7	2.22	未穿透
3	5	98.5	2.51	未穿透
4	5	130.0	4.37	穿透
5	6	144.0	9.26	穿透
6	6	147.0	9.65	穿透
7	6	211.0	19.89	穿透
8	6	218.0	21.23	穿透
9	6	219.0	21.43	穿透

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表 2 正交弹性模型材料参数

Table 2. Parameters of orthotropic elastic model

刚度系数									体积模量
C₁₁/GPa	C₂₂/GPa	C₃₃/GPa	C₁₂/GPa	C₂₃/GPa	C₃₁/GPa	G₁₂/GPa	G₂₃/GPa	G₃₁/GPa	A/GPa
19	120.5	120.5	7.8	20	7.8	8.8	23	8.8	36.8

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表 3 正交失效模型材料参数

Table 3. Parameters of orthotropic failure model

失效初始化
σ_fail-11/MPa	σ_fail-22/MPa	σ_fail-33/MPa	σ_fail-12/MPa		σ_fail-23/MPa	σ_fail-31/MPa
50	455	455	40		165	40

后失效响应
刚度退化因子	失效模式
0.2	11失效 11方向拉伸应力置0	22失效 22方向拉伸应力置0	33失效 33方向拉伸应力置0	12失效 11方向拉伸应力置0	23失效 11方向拉伸应力置0	31失效 11方向拉伸应力置0

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