#### 期刊菜单

Numerical Study on the Effect of Temperature on the Mechanical Properties of Aluminum Foam Sandwich Shells

Abstract: In this paper, numerical simulation methods are used to study the influence of temperature on the mechanical properties of aluminum foam sandwich shells. First, a finite element model of the alu-minum foam sandwich shells has established, and an impact load was applied. The simulation re-sults were compared with the experimental results to verify the accuracy of the finite element model. Secondly, the influence of temperature on the energy absorption and deformation of the aluminum foam sandwich shells is studied. The results show that at temperatures ranging from −50˚C to 300˚C, the energy absorption of the sandwich shells does not change significantly as the temperature increases. However, the deformation of the center point of the back panel and the structure’s overall deformation will increase with the increase of temperature, and the impact re-sistance of the entire structure will decrease. Finally, the failure mode of the aluminum foam sand-wich shells is analyzed. The results show that under the projectile’s impact, the sandwich shell mainly undergoes shear failure at −50˚C, 25˚C, and 300˚C. The upper and lower panels of the sand-wich shell are mainly the shear failure, and the aluminum foam core layer is the failure by compac-tion and collapse at the same time as the shearing failure occurs.

1. 前言

2. 有限元模型验证

2.1. 材料属性

Figure 1. Stress-strain curve of aluminum foam

Table 1. Material properties

Table 2. Material thermal parameters

2.2. 有限元模型

Figure 2. Finite element calculation model

2.3. 模型验证

( $\stackrel{¯}{I}=\frac{I}{{A}_{c}\left(2{\rho }_{f}h+{\rho }_{c}c\right)\sqrt{{\sigma }_{f}/{\rho }_{f}}}$，其中 ${A}_{c}$ 为子弹作用区域的面积， ${\rho }_{f}$${\rho }_{c}$ 分别为面板和泡沫铝的密度， ${\sigma }_{f}$

3. 温度对泡沫铝夹芯壳力学性能的影响

Figure 3. Simulation results and experimental results of the center point of the back panel

Figure 4. Deformation of aluminum foam sandwich shell

Figure 5. Energy absorption of aluminum foam sandwich shell at different temperature

(a) V = 50 m/s, T = 300℃ (b) V = 100 m/s, T = 300℃ (c) V = 150 m/s, T = 200℃ (d) V = 200 m/s, T = 100℃

Figure 6. Deformation diagram of aluminum foam at different projectile velocities and different temperatures

Figure 7. Deformation of the center point of the back panel of the aluminum foam sandwich shell at different temperatures

Figure 8. Overall deformation of the back panel of the aluminum foam sandwich shell at different temperatures

4. 夹芯壳在不同温度下的破坏形式

(a) T = −50℃ (b) T = 25℃ (c) T = 300℃

Figure 9. The simulated failure model of the sandwich shell at different temperatures

(a) T = −50℃ (b) T = 25℃ (c) T = 300℃

Figure 10. The simulated failure model of the aluminum foam at different temperatures

Figure 11. The experimental failure model of the aluminum foam core at ambient temperature (25˚C)

(a) T = −50℃ (b) T = 25℃ (c) T = 300℃

Figure 12. The simulated failure model of the 1/4 model of the sandwich shell

5. 结论

 [1] Damghani, M.N. and Gonabadi, A.M. (2019) Numerical Study of Energy Absorption in Aluminum Foam Sandwich Panel Structures Using Drop Hammer Test. Journal of Sandwich Structures and Materials, 21, 3-18. https://doi.org/10.1177/1099636216685315 [2] 夏志成, 张建亮, 周竞洋, 王曦浩. 泡沫铝夹芯板抗冲击性能分析[J]. 工程力学, 2017, 34(10): 207-216. https://doi.org/10.6052/j.issn.1000-4750.2016.06.0494 [3] Zhao, H., Elnasri, I. and Girard, Y. (2007) Perforation of Aluminium Foam Core Sandwich Panels under Impact Loading—An Experimental Study. International Journal of Impact Engineering, 34, 1246-1257. https://doi.org/10.1016/j.ijimpeng.2006.06.011 [4] Elnasri, I. and Zhao, H. (2016) Impact Perforation of Sand-wich Panels with Aluminum Foam Core: A Numerical and Analytical Study. International Journal of Impact Engineer-ing, 96, 50-60. https://doi.org/10.1016/j.ijimpeng.2016.05.013 [5] Jing, L., Xi, C.Q., Wang, Z.H. and Zhao, L. (2013) Energy Absorption and Failure Mechanism of Metallic Cylindrical Sandwich Shells under Impact Loading. Materials and De-sign, 52, 470-480. https://doi.org/10.1016/j.matdes.2013.05.090 [6] Jing, L., Wang, Z.H. and Zhao, L.M. (2013) Dynamic Response of Cylindrical Sandwich Shells with Metallic Foam Cores under Blast Loading—Numerical Simulations. Composite Structures, 99, 213-223. https://doi.org/10.1016/j.compstruct.2012.12.013 [7] Liu, X.R., Tian, X.G., Lu, T.J., Zhou, D. and Liang, B. (2012) Blast Resistance of Sandwich-Walled Hollow Cylinders with Graded Metallic Foam Cores. Composite Structures, 94, 2485-2493. https://doi.org/10.1016/j.compstruct.2012.02.029 [8] 王涛, 余文力, 秦庆华, 王金涛, 王铁军. 爆炸载荷下泡沫铝夹芯板变形与破坏模式的实验研究[J]. 兵工学报, 2016, 37(8): 1456-1463. [9] 张元豪, 程忠庆, 方志威, 侯海量, 朱锡. 泡沫铝夹芯结构对中低速FSP的抗侵彻特性研究[J]. 振动与冲击, 2019, 38(22): 231-235. https://doi.org/10.13465/j.cnki.jvs.2019.22.033 [10] 倪晶博. 温度对泡沫铝强度的影响[J]. 工程与试验, 2010, 50(4):19-21+68. https://doi.org/10.3969/j.issn.1674-3407.2010.04.007 [11] 王鹏飞, 徐松林, 胡时胜. 不同温度下泡沫铝压缩行为与变形机制探讨[J]. 振动与冲击, 2013, 32(5): 16-19. https://doi.org/10.13465/j.cnki.jvs.2013.05.009 [12] Hakamada, M., Nomura, T., Yamada, Y., Chino, Y., Chen, Y., Kusuda, H., et al. (2005) Compressive Deformation Behavior at Elevated Temperatures in a Closed-Cell Aluminum Foam. Materials Transactions, 46, 1677-1680. https://doi.org/10.2320/matertrans.46.1677 [13] Aly, M.S. (2007) Behavior of Closed Cell Aluminium Foams up-on Compressive Testing at Elevated Temperatures: Experimental Results. Materials Letters, 61, 3138-3141. https://doi.org/10.1016/j.matlet.2006.11.046 [14] Cady, C.M., Gray, G.T., Liu, C., Lovato, M.L. and Mukai, T. (2009) Compressive Properties of a Closed-Cell Aluminum Foam as a Function of Strain Rate and Temperature. Materi-als Science and Engineering A, 525, 1-6. https://doi.org/10.1016/j.msea.2009.07.007 [15] 习会峰, 刘逸平, 汤立群, 刘泽佳, 穆建春, 杨宝. 考虑温度效应的泡沫铝静态压缩本构模型[J]. 哈尔滨工程大学学报, 2013, 34(8): 1000-1005. https://doi.org/10.3969/j.issn.1006-7043.201211022 [16] Liu, Q. and Subshsh, G. (2004) A Phenomenological Constitutive Model for Foams under Large Deformations. Polymer Engineering and Science, 44, 463-473. https://doi.org/10.1002/pen.20041