Effect of melting bonding depth and lap mode on mechanical properties of plain glass fiber/MC nylon composites

doi:10.19936/j.cnki.2096-8000.20220328.016

Abstract

Abstract: Plain glass fiber/MC nylon composite material has the advantages of high specific strength, corrosion resistance and recyclability. It is one of the materials worthy of attention in the field of automobile in the future. In this paper, the effects of lap mode and fusion depth on joint strength of plain glass fiber/MC nylon composites were studied by experimental method under melting bonding process. The experimental results show that, under the same process parameters, the double lap butt joint has the best mechanical properties, and the tensile shear strength of the lap joint increases first and then decreases with the increase of melting depth. When the melting depth of the lap joint is 2 mm, the shear strength reaches the maximum of 19.24 MPa. Micro-CT technique was used to scan the single lap specimens with different melting depths. The results show that the matrix of lap interface gradually decreases with the increase of melting depth. With the increase of melting depth, the failure modes were plastic deformation and cracking of nylon matrix, cracking of nylon matrix and debonding of glass fiber and nylon matrix, debonding of glass fiber and nylon matrix.

Key words: thermoplastic composites, single lap shear test, Micro-CT, monomer casting nylon, damage

CLC Number:

TB332

GUO Wei-jian, TAO You-rui, DONG Li-jun, WU An-ru. Effect of melting bonding depth and lap mode on mechanical properties of plain glass fiber/MC nylon composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(3): 110-114.

References

[1] 孙喜龙. 汽车被动安全性的模块化建模方法与多目标优化研究[D]. 吉林: 吉林大学, 2013.
[2] PENG X, LIU S, HUANG Y, et al. Investigation of joining of continuous glass fibre reinforced polypropylene laminates via fusion bonding and hotmelt adhesive film[J]. International Journal of Adhesion and Adhesives, 2020, 100: 102615.
[3] 宋燕利, 杨龙, 郭巍, 等. 面向汽车轻量化应用的碳纤维复合材料关键技术[J]. 材料导报, 2016, 30(17): 16-25, 50.
[4] 马毓, 赵启林, 江克斌. 树脂基复合材料连接技术研究现状及在桥梁工程中的应用和发展[J]. 玻璃钢/复合材料, 2011(2): 78-82.
[5] 高佳佳, 楚珑晟. 纤维增强树脂基复合材料连接技术研究现状与展望[J]. 玻璃钢/复合材料, 2018(2): 101-108.
[6] 周利, 秦志伟,刘杉, 等. 热塑性树脂基复合材料连接技术的研究进展[J]. 材料导报, 2019, 33(19): 3177-3183.
[7] LIPPKY K, MUND M, BLASS D, et al. Investigation of hybrid fusion bonds under varying manufacturing and operating procedures[J]. Composite Structures, 2018, 202: 275-282.
[8] 李树健, 湛利华, 周源琦, 等. 基于图像处理的碳纤维增强树脂基复合材料固化压力-缺陷-力学性能建模与评估[J]. 复合材料学报, 2018, 35(12): 3368-3376.
[9] 李树健, 湛利华, 白海明, 等. 基于树脂流动的变截面复合材料结构固化过程热-流-固多场强耦合数值仿真[J]. 复合材料学报, 2018, 35(8): 119-126.
[10] SANO M, OGUMA H, SEKINE M, et al. High-frequency welding of glass-fibre-reinforced polypropylene with a thermoplastic adhesive layer: Effects of ceramic type and long-term exposure on lap shear strength[J]. International Journal of Adhesion and Adhesives, 2015, 59: 7-13.
[11] 张海燕, 李根臣, 王树伦, 等. MC尼龙的应用研究进展[J]. 工程塑料应用, 2010, 38(12): 88-90.
[12] 黄振强, 张彦飞, 张鹏, 等. 液化MDI作活化剂制备MC尼龙[J]. 工程塑料应用, 2020, 48(7): 27-32.
[13] 邵蒙, 刘晓飞, 李海柱, 等. MC尼龙聚合过程热效应研究[J]. 化工新型材料, 2021, 49(5): 162-165.
[14] 赵洪宝, 马丹, 马超群, 等. 航空用碳纤维复合材料典型缺陷无损检测技术研究[J]. 电子制作, 2020, 410(24): 37-39.
[15] 徐亚男. 处理铝合金与碳纤维板材粘接工艺性能实验及数值模拟研究[D]. 吉林: 吉林大学, 2017.