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Structural Engineering and Mechanics Volume 87, Number 2, July25 2023 , pages 107-116 DOI: https://doi.org/10.12989/sem.2023.87.2.107 |
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Numerical analysis of stress wave of projectile impact composite laminate |
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Zhangxin Guo, Weijing Niu, Junjie Cui, Gin Boay Chai, Yongcun Li and Xiaodong Wu
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| Abstract | ||
| The three-dimensional Hashin criterion and user subroutine VUMAT were used to simulate the damage in the composite layer, and the secondary stress criterion was used to simulate the interlayer failure of the cohesive element of the bonding layer and the propagation characteristics under the layer. The results showed that when the shear stress wave (shear wave) propagates on the surface of the laminate, the stress wave attenuation along the fiber strength direction is small, and thus producing a large stress profile. When the compressive stress wave (longitudinal wave) is transmitted between the layers, it is reflected immediately instead of being transmitted immediately. This phenomenon occurs only when the energy has accumulated to a certain degree between the layers. The transmission of longitudinal waves is related to the thickness and the layer orientation. Along the symmetry across the thickness direction, the greater is the stress amplitude along the layer direction. Based on the detailed investigation on the impact on various laminated composites carried out in this paper, the propagation characteristics of stress waves, the damage and the destruction of laminates can be explained from the perspective of stress waves and a reasonable layering sequence of the composite can be designed against damage and failure from low velocity impact. | ||
| Key Words | ||
| composite laminate; finite element analysis; impact load; laying sequence; stress wave | ||
| Address | ||
| Zhangxin Guo: College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Key Laboratory of Material Strength & Structural Impact, College of Mechanics, Taiyuan University of Technology, Taiyuan 030024, China Weijing Niu: Shanxi Polytechnic College, Taiyuan 030006, China Junjie Cui: College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China Gin Boay Chai: School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore Yongcun Li: College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China; National Demonstration Center for Experimental Mechanics Education, Taiyuan University of Technology, Taiyuan 030024, China Xiaodong Wu: College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China | ||