摘要
为进一步探究编织结构与长度对复合材料圆管压缩性能的影响,采用树脂传递模塑成型工艺复合二维编织铺层与三维四向编织圆管,通过轴向准静态压缩试验获取了 4 种复合材料圆管试样的压缩力学行为。结合高速摄影记录,分析了编织复合材料圆管的破坏过程及失效模式,探索其压缩失效机制。结果显示:试样均表现出弹塑性特征,但三维编织圆管呈现出更好的压缩承载特性,其压缩模量与载荷峰值分别达到 5. 91 GPa 与 14. 23 kN;试样呈现出纤维断裂、基体开裂脱黏、瓣状破坏、剪切以及挤压屈曲等破坏模式中的几种或全部的组合;二维编织复合材料圆管的渐进失效特征更为明显,具有较好的吸能特性,且其压缩模量随管件长度的增加而有所提升,但是吸能效果与试样长度呈非线性关系。
In order to further explore the influence of braid structure and length on the compression performance of composite circular tubes, two-dimensional over-braiding and three-dimensional four- directional braided circular tubes were manufactured by a resin transfer molding process. The compression mechanical behavior of four composite tube samples were obtained by quasi-static axial compression test. Combined with high-speed photographic recording, the failure process and failure mode of braided composite tubes were analyzed, and the compression failure mechanism was explored. The results show that the two braided structure tubes show elastoplastic characteristics, while the 3-D braided tube shows better compression bearing capacity, and has the compressive modulus and load peaks of 5. 91 GPa and 14. 23 kN, respectively. The samples exhibit several or all combinations of failure modes such as fiber breakage, matrix cracking, debonding, petal destruction, shearing and extrusion buckling. The progressive failure characteristics of the two-dimensional braided composite tubes are more obvious, and have better energy absorption characteristics. The compression modulus of the two-dimensional braided composite circular tubes increases with the length of the composite circular tubes, but the energy absorption effect is nonlinear with the length of the sample.
作者
谷元慧
张典堂
贾明皓
钱坤
GU Yuanhui;ZHANG Diantang;JIA Minghao;QIAN Kun(Key Laboratory of Eco-Textiles(Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122,China;Anhui Province College Key Laboratory of Textile Fabrics, Wuhu, Anhui 241000,China)
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2019年第7期71-77,共7页
Journal of Textile Research
基金
国家重点研发计划项目(2016YFB0303200)
国家自然科学基金项目(11702115)
江苏省自然科学基金项目(BK20170166)
江苏省研究生科研与实践创新计划项目(SJCX18_0626)
安徽省纺织工程技术研究中心联合开放基金项目(2018AKLTF04)
关键词
树脂传递模塑成型
编织复合材料
压缩试验
破坏模式
吸能特性
resin transfer molding
braided composite
compression test
destruction mode
energy absorption characteristic
