High temperature indentation behaviors of carbon fiber composite pyramidal truss structures
High temperature indentation behaviors of carbon fiber composite pyramidal truss structures
复制标题
碳纤维复合材料金字塔桁架结构的高温压痕行为
DOI：
10.1016/j.compstruct.2015.04.056
复制
发表时间：
2015-11
影响因子：
6.3
通讯作者：
Li Ma
中科院分区：
文献类型：
--
作者：
Jiayi Liu;Wufeng Qiao;Jingxi Liu;De Xie;Zhengong Zhou;Linzhi Wu;Li Ma
采用热压法制备了金字塔形桁架夹芯复合材料夹芯板。在此基础上，对复合材料夹层板在高温下的准静态压痕响应进行了实验研究。在20 °C ~ 200 °C温度范围内对复合材料夹芯板进行了准静态压痕试验。研究了高温下的损伤机理、载荷-位移曲线、压痕载荷和压痕吸收能量，并与室温下的结果进行了比较。结果表明，高温改变了复合材料的破坏机制，对复合材料的载荷-位移曲线、压痕载荷和能量吸收有显著影响。随着温度的升高，压痕载荷和压痕吸收能量降低。特别是在200 °C时，压痕载荷和压痕吸收能量的降低更为严重，这主要是由于基体性能和纤维-基体界面性能在较高温度下的劣化。
The composite sandwich panels with pyramidal truss cores were fabricated by the hot-press method. Subsequently, the experimental studies were performed to investigate the quasi-static indentation response of composite sandwich panel at high temperature. The quasi-static indentation tests of composite sandwich panels were conducted at temperatures ranging from 20 °C to 200 °C. The damage mechanism, load–displacement curves, indentation load and absorbed energies at high temperature were investigated and compared with that at room temperature. The results showed that high temperature induced a change in the failure mechanism and had the significant effect on the load–displacement curves, indentation load and energy absorption. The indentation load and absorbed energies decreased as temperature increased. Especially at 200 °C, the reduction in indentation load and absorbed energies was more severe, which was are mainly due to the degradation of matrix properties and fiber–matrix interface properties at higher temperature.
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