CNG-2型气瓶缠绕层树脂开裂影响因素研究

STUDY ON WOUND LAYER RESIN CRACKING FACTORS FOR CNG-2 TYPE CYLINDERS

针对CNG气瓶在自紧工艺中缠绕层会产生一定的树脂开裂这一问题,讨论复合材料本身属性对缠绕层树脂开裂的影响。提出一种多尺度建模方法,利用微观力学的方法探讨缠绕层的含胶量和纤维直径对树脂开裂程度的影响。结果表明树脂开裂程度随着含胶量的增大而减少,在企业生产的含胶量范围内,含胶量为34%时树脂开裂程度最小。在含胶量为34%时,利用多尺度模型研究了纤维直径对树脂开裂程度的影响,结果表明纤维直径对树脂开裂程度几乎没有影响。由于含胶量是由缠绕张力控制的,因此合理控制缠绕张力可以减少树脂开裂程度。实验验证了模型的准确性并为研究提供了参考,该研究可为改进CNG-2气瓶生产提供理论依据。

Aiming at improving compressed nature gas（ CNG） cylinders wound layer resin anti-crack characteristic,a multi-scale modeling method is proposed to investigate the resin cracking mechanism. In the simulation model,the influences of gel content of winding layer and fiber diameter was discussed by micro-mechanics approach.Simulation results indicate that resin cracking degree is reduced as the gel content increases,and the resin cracking degree reaches the minimum point while the gel content was set to 34%. Then the influence of fiber diameter on the resin crack was discussed using a multi-scale model by setting gel content to 34%,and the simulation results indicate that fiber diameter almost has no effect on the cracking of the resin. Finally,the validaty of the multi-scale model is verified by experimental results. Since the gel content can be adjusted by precisely control the winding tensions,the study can be adopted to reduce the degree of resin cracking and provide the theoretical reference for improving the production of CNG-2 cylinders.