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随着复合材料结构在航空航天领域的应用日渐广泛,非主承力结构壁板趋向于采用高比刚度的泡沫夹层结构。采用缝合工艺虽能提高泡沫夹层结构的面外性能和层间性能,但对泡沫夹层结构其它性能的影响并不明晰。通过压缩稳定性试验对泡沫夹层结构的稳定性进行研究,夹层结构分别采用单向带面板和织物面板。研究对象包括未缝合泡沫夹层结构和不同缝合密度的缝合泡沫夹层结构。试验结果表明:缝合会降低泡沫夹层结构的稳定性,缝合密度增加时,泡沫夹层结构稳定性性能降低。
With the increasing application of composite structures in the aerospace field, the non-main bearing structure siding tends to adopt a high-stiffness foam sandwich structure. Although the suture process can improve the out-of-plane performance and interlayer performance of the foam sandwich structure, the influence on the other properties of the foam sandwich structure is not clear. The stability of the foam sandwich structure was studied by compressive stability test. The sandwich structure was unidirectional with the panel and the fabric panel respectively. The subjects included the unseamed foam sandwich and the stitched foam sandwich with different suture densities. The experimental results show that the stitching can reduce the stability of the foam sandwich structure and the stability of the foam sandwich structure decreases when the suture density increases.