Development And Performance Of Profiled Cross-section Basalt Fiber Products

Basalt fiber is a high-performance fiber with high strength,good temperature resistance,acid and alkali resistance,and environmental protection.The profiled cross-section products made from basalt fiber can be widely used in construction,aerospace,automobile,environmental protection,construction and other engineering fields.This project independently developed and assembled a set of three-dimensional weaving device,and used the device to compile three-dimensional components such as tubular,I-shaped,triangular and quadrangle shaped.In addition,basalt fiber reinforced polylactic acid composite(BF/PLA)was prepared by fused deposition modeling 3D printing technology with continuous basalt fiber as reinforcement and polylactic acid as matrix.The effect of 3D printing parameters on the properties of composite materials was analyzed,and the 3D printing parameters were optimized.The specific contents are as follows:The first part is the development of three-dimensional basalt fiber products with profild cross-section.First,a set of devices was designed and assembled with Creo software that can manually weave three-dimensional basalt fiber products,The design,composition,characteristics and weaving principles of the weaving device are introduced.Secondly,the two-dimensional braided rope used for the weaving device.by a two-dimensional braiding machine,and the effects of braiding structure and braiding parameters on the friction resistance of the braided rope were studied spectively The results showed that: the friction resistance of basalt two-dimensional braided rope with a braided structure of 2×2 is significantly better than that of the braided structure of 1×1With the increased of the braided pitch,the tensile breaking strength of the two-dimensional braided rope increased,the longitudinal frictional strength loss rate first increases and then decreases,and the transverse frictional strength loss rate has no obvious change trend.Finally,an I-shaped three-dimensional fabric was designed and prepared by the developed weaving device,and the basalt two-dimensional braided rope was used.In the second part,BF/PLA samples were prepared using fused deposition modeling3 D printing technology,and the effects of 3D printing parameters such as printing layer height,printing speed,printing temperature,and printing track on the mechanical properties of BF/PLA samples were studied respectively.The results show that: the height of the printing layer has a great influence on the mechanical properties of the sample.As the height of the printing layer increases,the fiber volume fraction of the sample decreases,and various mechanical properties decrease accordingly.When the height of the printing layer is 0.3 mm,the sample's tensile,bending,and interlayer shear strengths are all the highest values,which are 198.65 MPa,249.75 MPa,and 10.79 MPa respectively.The printing temperature has a great influence on the interlayer shear performance of the sample.As the printing temperature increases,the interlayer shear strength of the sample increases significantly.Compared with the sample at 190?,the interlayer shear strength of the sample at 230? has increased by 74.3 %.The increase in printing temperature has a positive effect on the improvement of the tensile and bending properties of the sample,but the effect is small.As the printing speed increases,the impregnation effect of molten polylactic acid on basalt fiber bundle becomes worse,resulting in a certain decrease in the mechanical properties of the sample.Different printed track have a greater impact on the impact resistance of the sample.Under the action of impact load,the impact resistance of the samples printed with double track is better than that of the samples printed with single track,and the impact resistance of the samples with printing track of ±45° is the best.The third part optimizes the mechanical properties of T-shaped cross-section BF/PLA composites through orthogonal experimental design,mainly including the influence of printing layer height,printing temperature,and printing speed on the mechanical properties of BF/PLA composites.The results show that: the height of the printing layer has the greatest influence on the mechanical properties of the T-shaped cross-section BF/PLA composite material,followed by the printing speed,and the printing temperature has the least influence on the bending performance.The best combination of printing parameters is that the printing layer height is 0.3 mm,the printing temperature is 230? and the printing speed is 20 mm/s.