Abstract:

Taking 2.5D with stuffer warp carbon woven fabric for example,the compaction characterization of 2.5D angle-interlock woven fabric had been studied preliminarily, and the relationship between thickness and compaction pressure could be acquired by using island ferry universal material testing machine. The research showed that the compaction modelling of multilayer plain fabrics with empirical index of 3 could approximately reflect the relationship between thickness and compaction pressure of 2.5D with stuffer warp carbon woven fabric when the compaction pressure was less than 3MPa. Further more, the 2.5D with stuffer warp woven composites were manufactured under four different compaction pressure, then the distribution of local crimp angle of yarn segment were applied to represent the degree of yarn waviness by observing the warp,stuffer warp and weft structure in warp and weft cross-section, it was found that the degree of warp crimp was the highest, and the warp crimp decreased with the increase of compaction pressure, when the pressure was over a certain range, the warp crimp increased; The stuffer warp and weft were basically straight, but the crimp of stuffer warp increased while the pressure was over the certain range, and the weft became more straight.

Key words: 2.5D angle-interlock woven fabric, compaction in thickness direction, thickness-pressure curve of fabric, local crimp angle