低速冲击能量下环氧树脂复合材料损伤特征和压缩失效行为

王玲; 李茜; 胡涛; 李永; 佘祖新; 任宏宇

doi:10.7643/ issn.1672-9242.2025.11.018

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装备环境工程 ›› 2025, Vol. 22 ›› Issue (11) : 169-177. DOI: 10.7643/ issn.1672-9242.2025.11.018

环境试验与观测

低速冲击能量下环氧树脂复合材料损伤特征和压缩失效行为

王玲, 李茜, 胡涛, 李永, 佘祖新, 任宏宇

作者信息 +

Low-velocity Impact Damage and Compression Failure Behavior of Epoxy Composites

WANG Ling, LI Qian, HU Tao, LI Yong, SHE Zuxin, REN Hongyu

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文章历史 +

摘要

目的研究不同低速冲击能量下WP3011/9A16/40%复合材料层压板的冲击损伤特征,以及对冲击后压缩性能的影响。方法对复合材料进行不同冲击能量的低速冲击和冲击后压缩试验,采用显微镜、超声C扫描、图像数字相关技术、力学测试设备等手段观测复合材料表观和内部损伤、压缩应变变化、剩余压缩强度及断口形貌,对比分析复合材料层压板不同冲击损伤特征、剩余压缩强度变化及其压缩破坏失效模式。结果 WP3011/9A16/40%复合材料层压板表面和内部损伤程度随着冲击能量水平的增大而增加,冲击能量水平大于4.5 J/mm时,凹坑深度显著增大,内部超声C扫描面积的增大趋势减缓,剩余压缩强度随着冲击能量增大而下降。6.7 J/mm及以上冲击能量水平时,复合材料的冲击部位出现微屈曲失效特征。结论 WP3011/9A16/40%复合材料冲击内部损伤以分层和基体裂纹为主,内部损伤面积随冲击能量增大先增大、后趋于平缓。压缩过程中,复合材料压缩损伤破坏起始于冲击部位,并向压缩载荷垂直方向扩展。冲击部位压缩破坏主要为分层失效,并且随着冲击损伤程度增大出现微屈曲特征,远离冲击部位压缩破坏形式为剪切分层。

Abstract

The work aims to study the impact damage characteristics of WP3011/9A16/40% composite laminates under different low-velocity impact energy levels and their effects on post-impact compressive performance. Low-velocity impact tests and compression-after-impact (CAI) tests were conducted on the composite at varying impact energy levels. Microscopy, ultrasonic C-scan, digital image correlation (DIC), and mechanical testing equipment were employed to observe surface and internal damage, compressive strain evolution, residual compressive strength, and fracture morphology. A comparative analysis was performed on the impact damage characteristics, residual compressive strength variation, and compressive failure modes of the composite laminates. The extent of surface and internal damage in WP3011/9A16/40% composite laminates increased with the increase of the impact energy level. When the impact energy exceeded 4.5 J/mm, the dent depth increased significantly, while the growth rate of the internal damage area (measured via ultrasonic C-scan) slowed. The residual compressive strength decreased with the increase of the impact energy. At impact energy levels of 6.7 J/mm and above, localized micro-buckling failure characteristics appeared in the impacted region. The internal damage in WP3011/9A16/40% composites primarily consists of delamination and matrix cracking. The internal damage area initially increases with impact energy but then gets stable. During compression, damage propagation originates from the impact site and extends perpendicular to the compressive load. The primary failure mode in the impacted region is delamination, with micro-buckling becoming more pronounced at higher impact energy levels. In contrast, shear-induced delamination dominates in regions away from the impact site.

导出引用

王玲, 李茜, 胡涛, 李永, 佘祖新, 任宏宇. 低速冲击能量下环氧树脂复合材料损伤特征和压缩失效行为[J]. 装备环境工程. 2025, 22(11): 169-177 https://doi.org/10.7643/ issn.1672-9242.2025.11.018

WANG Ling, LI Qian, HU Tao, LI Yong, SHE Zuxin, REN Hongyu. Low-velocity Impact Damage and Compression Failure Behavior of Epoxy Composites[J]. Equipment Environmental Engineering. 2025, 22(11): 169-177 https://doi.org/10.7643/ issn.1672-9242.2025.11.018

中图分类号： TJ04

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