喷胶对复合材料风电叶片剪切性能的影响

EFFECTS OF SPRAY GLUE ON COMPOSITES SHEAR MECHANICAL PROPERTIES OF WIND TURBINE BLADE

研究喷胶对复合材料叶片剪切性能的影响。模拟不同类型玻纤布在模具上铺设时进行喷胶固定的过程,采用真空灌注工艺(VIP)制作复合材料样板,使用锻烧法测试不同样板中玻纤的体积含量,从理论上分析了纤维含量与复合材料面内剪切强度的关系,以及利用万能试验机对复合材料样条进行层间剪切性能破坏测试。结果表明,使用喷胶后,单向布复合材料的纤维含量基本没变化,三轴向布复合材料玻纤含量下降了6.9%,单向布复合材料的层间剪切性能下降了61.4%,三轴布复合材料的层间剪切性能下降了18.8%,因此,喷胶禁止在以单向布为主的复合材料铺层里使用,在铺设三轴布复合材料时可以适量使用。

Effects of spray glue on composites shear properties of wind turbine blade in vacuum injection process were studied. The process of laying different type of fiber glass cloths on mould fixed by glue was simulated in the laboratory. Fiber glass reinforced polymer（ epoxy resin） matrix composites（ GFRP） were fabricated by vacuum injection process. The different groups of fiber glass content was tested by the method of calcined.The influence of fiber content on in-plane shear strength was analyzed in theory. Interlaminar shear strength of GFRP laminates was tested by mechanical testing machine. Results show that,the fiber glass content of the GFRP was almost the same as the spray glue was used on the undirectional fiber glass cloths,but for triaxial fiber glass cloths,it decreased by 6. 9% in volume. Interlaminar shear strength of composites with unidirectional fiber glass cloths decreased by 61. 4 %,and that of the composites with triaxial fabrics decreased by 18. 8%. Therefore,spray glue on unidirectional fabric cloths should be prohibited. The triaxial cloths could be fixed by glue in moderation.