Visualization and quantification of low-velocity impact damage of three-dimensional braided CFRP composites by micro-computed tomography

Mengyao Sun; Diantang Zhang; Kun Qian

doi:10.1016/j.heliyon.2022.e12110

Visualization and quantification of low-velocity impact damage of three-dimensional braided CFRP composites by micro-computed tomography

Heliyon. 2022 Dec 9;8(12):e12110. doi: 10.1016/j.heliyon.2022.e12110. eCollection 2022 Dec.

Authors

Mengyao Sun¹, Diantang Zhang¹, Kun Qian¹

Affiliation

¹ Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China.

Abstract

In this paper, the low-velocity impact response and damage of three-dimensional five-directional (3D5d) braided carbon/epoxy composites under different energies (30 J, 65 J, 100 J) are studied. Importantly, the damage is segmented from the axial and radial directions of the yarn to visualize and quantify the damage distributions in different regions based on micro-CT. The results show that as compared with the samples under 30 J and 100 J, the samples under 65 J energy perform higher impact properties. Moreover, as the impact energy increases from 30 J to 100 J, the corresponding damage volume increases from 6.886 mm³ to 477.133 mm³. Furthermore, the damage distributions are almost symmetrical in space.

Keywords: Damage quantification; Damage visualization; Low-velocity impact.