Numerical simulations of response and failure of carbon nanotube/carbon fibre reinforced plastic laminates under impact loading

被引：0

作者：

Wang M. ^{[1
]}

Wen H. ^{[1
]}

机构：

[1] CAS Key Laboratory for Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei

来源：

Baozha Yu Chongji/Explosion and Shock Waves | 2022年 / 42卷 / 03期

关键词：

Carbon fiber reinforced plastics (CFRP); Carbon nanotube; Cohesive element model; Damage coupling; Dynamic progressive damage model; Impact loading; Matrix toughening factor; Residual intensity factor;

D O I：

10.11883/bzycj-2021-0050

中图分类号：

学科分类号：

摘要：

Fibre reinforced plastic (FRP) laminates have been widely used in various engineerings due to their excellent mechanical properties. However, FRP laminates may be subjected to impact loading and delamination is one of the major concerns which is caused by the poor performance of matrix and the poor bonding between fibre and matrix. To improve the bonding strength, some toughening technologies have been developed including the modification of matrix by adding nano fillers such as carbon nanotubes. In this paper, numerical simulations of the response and failure of carbon nanotube/carbon fibre reinforced plastic (CNT/CFRP) under low velocity impact loading were performed. Firstly, on the basis of the previous work, a new dynamic progressive damage model for FRP laminates was developed by introducing a matrix toughening factor and a residual strength factor into the damage criterion and damage evolution equation respectively, together with an improved damage coupling equation which was changed from the original sum form to product form. The new dynamic progressive damage model was used to describe the intralaminar damage, and a cohesive element model to describe the interlaminar damage of the CNT/CFRP laminates. Both models were incorporated into the ABAQUS/Explicit finite element program by the user-defined material subroutine VUMAT. Then, numerical simulation was conducted for the response and failure of CNT/CFRP composites subjected to low velocity impact loading. Finally, the numerical results were compared with some available experimental data and the influence of impact velocity was discussed. It transpires that the results predicted from the present model are found to be in good agreement with the test data for CNT/CFRP laminates in terms of load-displacement curve and failure pattern, and the delamination damage at the interlaminar interface decreases gradually with increasing CNT content. It also transpires that the impact velocity affects the ratio of compression and tensile failure of FRP laminates, and under the same impact energy, a larger impact velocity will cause more tensile failure. © 2022, Editorial Staff of EXPLOSION AND SHOCK WAVES. All right reserved.

引用

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