E3S Web Conf.
Volume 233, 20212020 2nd International Academic Exchange Conference on Science and Technology Innovation (IAECST 2020)
|Number of page(s)||8|
|Section||NESEE2020-New Energy Science and Environmental Engineering|
|Published online||27 January 2021|
Thermal stress damage effect of matrix modified CFRP subjected to lightning
1 Aeronautics Engineering College, Air Force Engineering University, Xi’an 710038, China
2 Aviation Maintenance NCO Academy, Air Force Engineering University, Xinyang, Henan 464031, China
3 State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi’an 710054, China
* Corresponding author: email@example.com
Aiming at the carbon fiber reinforced plastics (CFRP) of poor electrical conductivity which will lead to thermal stress damage due to intense Joule effect under lightning strikes, electro-thermal-structure coupling models of CFRP lightning strikes were established. By analyzing the thermal strain, thermal stress and status of the modified and unmodified CFRP, their thermal expansion characteristics were compared. Compared with the unmodified CFRP, the thermal strain peak value of the modified CFRP is respectively increased by 36.33%, 53.92%, 66.62%, and the thermal stress peak value of them is respectively reduced by 22.63%, 26.53%, and 9.45% in the absence of dielectric breakdown. But in the breakdown state, both specimens appear complete delamination damage, the protective effect of matrix modification becomes invalid. The thermal stress damage is found having little effect on the damage morphology of the specimens after lightning strikes by comparing their CT images.
© The Authors, published by EDP Sciences 2021
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