玻纤分布层合热塑性复合材料的力学性能及其失效行为

发布时间：2018-06-16 06:34

本文选题：玻纤复合材料 + 增强体分布　；参考：《华东理工大学学报(自然科学版)》2017年04期

【摘要】：使用连续玻纤毡和玻纤网格布两种形态增强体,通过宏观不均匀增强体结构设计,在连续化运行的双钢带压机上制备得到了玻纤分布层合热塑性复合材料,探讨了玻纤增强体分布层合结构对复合材料力学性能及其失效破坏行为的影响。结果表明,玻纤增强体的宏观不均匀层合结构对复合材料的拉伸及弯曲性能的影响存在差异;连续玻纤毡位于外侧的分布层合结构能够抑制裂纹在垂直于拉力方向的扩展,层间分离的同时使更多的纤维束拔出断裂,显著改善了复合材料的拉伸性能;玻纤网格布位于外侧的分布层合结构则使其弯曲性能明显提高,外侧玻纤网格布中取向的玻纤呈现张力破坏使复合材料能够承受更高的弯曲载荷;分布层合结构中引入的玻纤网格布发挥了纤维束增韧作用,大幅提高了复合材料的冲击强度;与玻纤毡增强热塑料复合材料(GMT)相比,适宜的分布层合结构可使复合材料的拉伸及弯曲性能提高59%~76%、冲击强度提高53%。
[Abstract]:Using two kinds of continuous glass fiber felt and glass fiber mesh fabric, the glass fiber distributed laminated thermoplastic composites were prepared on a continuous running double steel strip press. The effects of the glass fiber reinforced body distribution layer on the mechanical properties and failure behavior of the composites were discussed. The results show that the influence of the macroscopic uneven laminating structure of the glass fiber reinforced body on the tensile and bending properties of the composites is different. The distributed laminated structure of the continuous glass fiber felt at the outside can inhibit the expansion of the crack in the direction perpendicular to the tensile force, and the interlayer separation simultaneously makes more fiber bundles pull out fracture and improves the composite significantly. The tensile properties of the material, the distributed laminated structure on the outer side of the glass fiber mesh fabric, make the flexural performance of the material obviously improved. The tensile failure of the glass fiber in the lateral glass fiber mesh fabric makes the composite material withstand a higher bending load; the glass fiber mesh cloth introduced in the distribution layer structure plays the toughening effect of the fiber bundle, and greatly improves the toughening effect. The impact strength of the composites is compared with the glass fiber reinforced thermoplastic composites (GMT). The suitable distribution layer structure can improve the tensile and bending properties of the composites by 59%~76%, and the impact strength increases by 53%..
【作者单位】：华东理工大学机械与动力工程学院;华东理工大学化学工程联合国家重点实验室;
【基金】：国家自然科学基金(21376086)
【分类号】：TB332

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