摘要
制备二氧化硅质量分数为23%的二氧化硅/聚乙二醇剪切增稠液(STF),采用流变仪测试STF的稳态和动态流变性能.将STF与经编间隔织物(WKSF)复合后,测试其动态冲击压缩性能.研究结果表明,在低剪切速率作用下,STF出现剪切变稀现象,达到临界剪切速率后,出现增稠现象.在动态冲击压缩下,STF-经编间隔织物复合材料与纯经编间隔织物表现出不同的压缩性能,纯经编间隔织物在压缩过程中存在弹性阶段和压实阶段,STF-经编间隔织物复合材料则表现为均一弹性模量压缩.相比于纯经编间隔织物,STF-经编间隔织物复合材料变形较小,在相同形变时吸收的能量较多.
Shear thickening fluid （STF） is prepared by dispersing 23% mass fraction of silica into the polyethylene glycol. The steady and dynamic rheological properties of the STF are explored using the rheometer. Composite is manufactured by impregnating the STF into the warp-knitted spacer fabrics （WKSF）, and the mechanical properties of the composite are tested under dynamic impact compression loading. Shear thinning phenomenon is observed when the STF subjected to low shear rate, when the shear rate exceeds the critical value, shear thickening will emerge. There is a significant difference in the dynamic impact compression response between the pure WKSF and the composite reinforced with STF. The compression process of the pure WKSF can be divided into two stages while the composite reinforced with STF shows a constant elastic compressive modulus. The deformation of the composite is much smaller than that of pure WKSF but its energy absorption capability is superior.
出处
《东华大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第3期253-257,共5页
Journal of Donghua University(Natural Science)
基金
国家自然科学基金资助项目(10802022
10872049)
教育部重大项目基金资助项目(3039014)
关键词
剪切增稠液
流变性能
经编间隔织物
复合材料
动态冲击压缩性能
shear thickening fluid
rheological properties
warp-knitted spacer fabric
composite
dynamic impact compression performance
