Multi-scale finite element analysis on the soft impact behavior of twill weave laminate

• Published in: Thin-walled structures 2023-09, Vol.190, p.110952, Article 110952
• Main Authors: Huang, Jinzhao, Zhao, Jiuzhou, Li, Zhixing, Liu, Siyu, Guo, Licheng, Tang, Yu, Zhang, Li
• Format: Article
• Language: English
• Subjects: Impact behavior characterization; Multi-scale model; Soft impact; Twill weave laminate
• ISSN: 0263-8231
• DOI: 10.1016/j.tws.2023.110952

This work proposed an impact momentum flexibility (IMF) to precisely and concisely characterize the soft impact behavior of twill weave laminate based on multi-scale finite element analysis. A multi-scale finite element model taking into consideration the microstructure and properties of constituents is established for twill weave laminate. The equivalent properties of fiber tows and twill weave laminate are predicted by micro-scale model and meso-scale model, respectively. Then the soft impact behavior of the laminate is investigated by macro-scale model. The multi-scale model is validated on different scales by comparing the experimental and simulated results of quasi-static compression and soft impact. On this basis, the deformation and failure of the laminate under soft impact are analyzed. The soft impact response is categorized according to the damage morphology and impact velocity. Moreover, the IMF is proposed to depict the ability to resist soft impact deformation of the laminate, and can be further adopted to rank the soft impact property of different materials. •Established the multi-scale finite element model for the twill weave laminate.•Obtained and categorized the soft impact response of the twill weave laminate.•Proposed the impact momentum flexibility (IMF).•Characterized the soft impact behavior precisely and concisely using IMF.