一种采用固化Z-pin制造X-cor夹层结构的方法

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一种采用固化Z-pin制造X-cor夹层结构的方法

一种采用固化Z-pin制造X-cor夹层结构的方法，属于复合材料夹层结构成型方法。该方法采用插孔器在泡沫芯材上预插孔，孔径不大于所采用的Z-pin直径；通过预制一块带有Z-pin的芯材，在蒙皮树脂固化制度下热压处理，测量计算出芯材在蒙皮固化制度下的压缩收缩率；根据泡沫厚度、Z-pin与泡沫表面的夹角和Z-pin插入蒙皮的厚度，算出所需Z-pin长度，将纤维束经过垂直引伸，连续烘干固化两端磨尖和后固化制成Z-pin；Z-pin沿预插孔植入泡沫，铺放蒙皮并固化成X-cor夹层结构。该方法避免了在制备过程中造成Z-pin的损伤；避免了Z-pin插入蒙皮过深引起的蒙皮开裂或插入过浅造成的结合过弱，提高了Xcor夹层结构的抗弯、抗压、抗剪性能。

A method of preparing X-corsandwich structure by curing Z-pin

A method of preparing an X-corsandwich structure by curing Z-pin belongs to shaping methods of composite materialsandwich structures and includes steps of: pre-forming insert holes in a foamcore material by using an insertion hole forming device, wherein the diameterof the holes are not larger than the diameter of the adopted Z-pin; pre-formingthe core material with the Z-pin and performing hot pressing treatment under a resincuring procedure of skin, and measuring and calculating the compressionshrinkage rate of the core material under the curing procedure of skin;according to foam thickness, the included angle between the Z-pin and thesurface of the foam, and the insert depth of the Z-pin into the skin,calculating required length of the Z-pin, vertically drafting a fiber bundleand continuously drying and curing two ends, and sharpening and post-curing thematerial to form the Z-pin; implanting the Z-pin into the foam through the insertholes, laying the skin, and curing to form the X-cor sandwich structure. Themethod can avoid damage to the Z-pin during preparation and avoid skin crackingdue to excessive insert depth of the Z-pin into the skin or weak combinationdue to insufficient insert depth of the Z-pin into the skin, and improvesanti-bending, anti-compressing and anti-shear performances of the X-corsandwich structure.