摘要
制备了端部带有加强箍的三种不同高度的碳纤维增强复合材料(CFRP)厚壁圆筒和层合板试样;对圆筒试样进行了准静态轴向压缩性能实验和速度在7.67～12.01m.s-1范围内的轴向冲击压缩试验,分别研究了长径比、冲击速率、端部加强等因素对轴向抗压强度、失效模式的影响规律;对CFRP层合板试样进行了不同应变率下的面内压缩试验。运用ANSYS/LS-DYNA软件对落锤加载下复合材料圆筒的响应过程进行了数值模拟。结果表明:采用端部加强方式不仅可以避免CFRP圆筒出现端部"开花式"渐进破坏的失效模式,而且能有效提高轴向抗压强度;层合板和圆筒试样的抗压强度均具有明显的正应变率效应;数值模拟结果与实验数据具有较好的一致性。
The end strengthened thick tubes with different aspect ratio and laminate samples made of carbon fiber reinforced plastic（CFRP） composite were prepared.Quasi-static and axial impact compression experiments in the range of 7.67~12.01 m·s-1 were carried out.The effects of aspect ratio,impact velocity,and the end-strengthening on the axial compressive strength and failure model of CFRP tubes were studied.In-plane compression tests with different strain rates were conducted on the laminate samples.Numerical simulations were performed by using ANSYS/LS-DYNA on the response of CFRP tube subjected to the dynamic impacting by drop weight.The results indicate that the progressive failure mode from the end is prevented,and the axial compressive strength is also enhanced effectively by end-strengthening of the CFRP tube.In addition,the compressive strength displays a marked strain rate strengthening effect for CFRP tubes and laminate samples.Numerical results are in good correlation with experimental results.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2013年第2期159-164,共6页
Acta Materiae Compositae Sinica
基金
爆炸科学与技术国家重点实验室基金项目(ZDKT10-02b)
作者简介
通讯作者：皮爱国，讲师，主要从事材料及结构的动态响应研究E—mail：aiguo_pi@bit．edu．cn
