连续玻璃纤维增强PP复合材料工字梁拉挤成型及补强

Pultrusion and Reinforcement of Continuous Glass Fiber Reinforced Polypropylene Composite I-beam

现有的工字梁主要材料为金属或木材,容易受到使用环境的限制。为此研究了不同拉挤成型工艺条件对连续玻璃纤维(GF)增强聚丙烯(PP)工字梁力学性能的影响,以及GF网格布补强对工字梁破坏形式与性能的影响。研究表明,在拉挤成型模具温度235℃,冷却定型模具温度梯度65℃/85℃/105℃,拉挤速度80 mm/min时得到的复合材料工字梁力学性能最优,弯曲破坏载荷达4842 N。GF网格布的加入有效的改善了工字梁的破坏形式,使工字梁弯曲破坏载荷提高了6.0%。

Main material of I-beam is metal or wood,these materials are easily limited by the use environment.The influence of different pultrusion process conditions on the mechanical properties of continuous glass fiber(GF)reinforced polypropylene(PP)I-beam and the influence of glass fiber mesh reinforcement on the failure mode and properties of I-beam were studied.The results show that the mechanical properties of I-beam are the best when the temperature of pultrusion die is 235℃,the temperature gradient of cooling die is 65℃/85℃/105℃and the pultrusion speed is 80 mm/min.The research show that the addition of glass fiber mesh can effectively improve the failure mode of I-beam,improve the mechanical properties of I-beam,and the bending failure load reaches 4842 N.The addition of GF mesh cloth effectively improves the failure form of the I-beam and increases the bending failure load of the I-beam by 6.0%.