吉林大学学报(工学版) ›› 2019, Vol. 49 ›› Issue (3): 822-828.doi: 10.13229/j.cnki.jdxbgxb20180210

• • 上一篇    下一篇

湿热环境对车用粘接剂拉伸强度的影响

那景新1(),刘浩垒1,范以撒2(),秦国锋1,浦磊鑫1   

  1. 1. 吉林大学 汽车仿真与控制国家重点实验室,长春 130022
    2. 华北水利水电大学 机械学院,郑州 450045
  • 收稿日期:2018-03-09 出版日期:2019-05-01 发布日期:2019-07-12
  • 通讯作者: 范以撒 E-mail:najx@jlu.edu.cn;fanyisa123@163.com
  • 作者简介:那景新(1957?),男,教授,博士生导师.研究方向:车身结构设计理论与轻量化技术.E?mail: najx@jlu.edu.cn
  • 基金资助:
    国家自然科学基金项目(51775230)

Effect of hygrothermal environment on vehicle adhesive tensile strength

Jing⁃xin NA1(),Hao⁃lei LIU1,Yi⁃sa FAN2(),Guo⁃feng QIN1,Lei⁃xin PU1   

  1. 1. State Key Laboratory of Vehicle Simulation and Control,Jilin University,Changchun 130022,China
    2. School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045,China
  • Received:2018-03-09 Online:2019-05-01 Published:2019-07-12
  • Contact: Yi?sa FAN E-mail:najx@jlu.edu.cn;fanyisa123@163.com

摘要:

为研究湿热环境对车用Sikaflex?265粘接剂拉伸性能的影响,本文通过铝合金对接接头的准静态拉伸试验,得到Sikaflex?265粘接剂在20种湿热组合环境下的拉伸失效强度。利用Matlab软件,分别以二次多项式函数和指数函数对试验数据进行拟合,发现二次多项式函数能更精确反映出Sikaflex?265粘接剂拉伸失效强度随温度和湿度的变化规律。最后,利用Matlab软件进行回归分析,建立了Sikaflex?265粘接剂在任意湿热条件下拉伸失效强度的预测模型,与试验结果对比,模型的预测结果具有较好的精度。

关键词: 车辆材料, 粘接剂, 拉伸强度, 湿热环境

Abstract:

In order to study the effect of hygrothermal environment on the tensile properties of Sikaflex?265 adhesive for vehicle, the tensile failure strength of Sikaflex?265 adhesive was obtained under the quasi?static tensile test of aluminum alloy butt joint in 20 kinds of hygrothermal environment. With Matlab software, the test data were fitted by quadratic polynomial function and exponential function. The quadratic polynomial function was found to be more accurate to reflect the variation trend of Sikaflex?265 adhesive tensile failure strength with temperature and humidity. With Matlab software, regression analysis was made to establish the prediction model of Sikaflex?265 adhesive tensile failure strength under arbitrary hygrothermal conditions. Comparison with the experimental result shows that the proposed model has good prediction precision.

Key words: vehicle material, adhesive, tensile strength, hygrothermal environment

中图分类号: 

  • TG14

表1

Sikaflex?265、6005A铝合金的主要性能参数"

材料弹性模量/MPa泊松比密度/(kg·m-3)
Sikaflex?2652.70.481200
6005A铝合金710000.332730

图1

粘接试件示意图及其结构尺寸"

图2

粘接试件的夹具"

图3

湿热环境箱和万能试验机"

图4

不同温湿度条件下Sikaflex?265粘接剂的平均失效强度"

图5

一定湿度条件下失效强度与温度的关系曲线"

图6

一定温度条件下失效强度与湿度的关系曲线"

图7

失效样貌"

图8

回归曲面"

图9

交互式界面"

表2

试验和回归模型预测结果对比"

试验

编号

试验条件

试验结果

/MPa

回归模型预测结果/MPa

相对误差

/%

125 ℃/60%RH7.53607.26563.59
235 ℃/60%RH6.39606.6380-3.78
350 ℃/70%RH5.96685.62635.71
465 ℃/80%RH4.53404.7809-5.45
575 ℃/90%RH4.2074.2596-1.25
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[1] 那景新, 浦磊鑫, 范以撒, 沈传亮. 湿热环境对Sikaflex-265铝合金粘接接头失效强度的影响[J]. 吉林大学学报(工学版), 2018, 48(5): 1331-1338.
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