Numerical simulation of residual tensile strength of FMLs with low-velocity impact damage

doi:10.19936/j.cnki.2096-8000.20231128.004

Abstract

Abstract: Fiber metal laminates (FMLs) combine the excellent properties of composite materials and metal materials, which is gradually used as a lightweight structure for automobiles and airplanes. However, some damage must appear inside FMLs after low-velocity impact, especially the complex damage modes in the composite material, which can cause inestimable loss for the residual tensile strength of FMLs. Therefore, it is of great engineering significance to explore the residual tensile strength of FMLs with various impact damage. In this paper, the numerical models of FMLs under low-velocity impact and quasi-static tensile are firstly established, and their accuracy and reliability are verified by the low-velocity impact/tensile tests. Then, in virtue of finite element restart technology, an integrated numerical model combined with impact, separation and tension of FMLs is established, and the residual tensile strength of FMLs under different impact loadings is numerically simulated, and the residual strength rules after impact loadings can be further summarized. Finally, the residual tensile strength of FMLs is studied based on the quantitative model after impact, and compared with the results between the integrated numerical model and the quantitative mode. The accuracy of the quantitative analysis method is verified, which can save the calculation cost and improve the research efficiency.

Key words: fiber-metal laminate, numerical simulation, low-velocity impact, integrated numerical model, quantitative analysis, composites

CLC Number:

TB332

ZHANG Shaofeng, WEI Jinhui, TANG Xinchun, XU Jiajing, LIU Xinyu, YAO Lu. Numerical simulation of residual tensile strength of FMLs with low-velocity impact damage[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(11): 28-36.

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