Journal of Jilin University(Engineering and Technology Edition) ›› 2020, Vol. 50 ›› Issue (1): 100-106.doi: 10.13229/j.cnki.jdxbgxb20181206

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Thickness distribution of adhesive layer in dissimilar clinch⁃adhesive hybrid joint with steel and aluminum alloy

Wei-min ZHUANG1(),Hong-da SHI1,Dong-xuan XIE2,Guan-nan YANG3   

  1. 1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China
    2. Department of Technical Development, FAW?Volkswagen Automobile Co. Ltd. , Changchun 130011, China
    3. Safety Technology Development Division, Geely Automobile Research Institute（Ningbo）, Ningbo 315336, China
  • Received:2018-11-22 Online:2020-01-01 Published:2020-02-06

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Abstract:

The clinch-adhesive hybrid joining technology has many advantages such as good abradability and good energy absorption. This technology is very promising and can be widely used in the aspect of car body. To study the influence of the thickness of adhesive in the clinch-adhesive hybrid joint on the forming quality and the joint performance, a finite element model (FEM) of clinch-adhesive hybrid joining was established, and was validated by the experiment. The FEM is applied to analyze the adhesive layer distribution in the joint and the variation tendency of adhesive layer during the forming process, and the influence of the adhesive thickness on the forming quality was investigated. The results indicate that the adhesive thickness firstly decreases and then increases from the centre of joint bottom to the interlock region, and the thickest part is locate in the bottom corner. During the clinching process, the thickness distribution of adhesive varies with the increase in the punch displacement, the adhesive thickness influences the interlock value and the neck thickness of the joint.

Key words: materials synthesis and processing technology, clinch-adhesive joint, adhesive layer distribution, forming process, finite element simulation

CLC Number: 

  • TG146

Fig.1

Process of clinch?adhesive"

Fig.2

Dimensions of punch and die"

Fig.3

Cross?section of clinch?adhesive hybrid joint"

Fig.4

Dimensions of adhesive tensile specimen"

Fig.5

Stress?strain curve of adhesive"

Fig.6

Finite element model of clinch?adhesive joining"

Table 1

Material properties of steel and aluminum"

材 料弹性模量/GPa泊松比屈服强度/MPa抗拉强度/MPa
Q235钢板2100.3251.9442.5
5754铝合金700.3162.1273.0

Fig.7

Simulation of clinch?adhesive joining process"

Fig.8

Comparison between experiment and simulation results"

Table 2

Comparison between experiment and simulation data"

参 数实验值/mm仿真值/mm误差/%
颈厚值0.2020.2187.9
自锁值0.1410.1307.8
颈厚处胶层厚度0.0270.0258.0
自锁处胶层厚度0.0120.0119.1
圆角处胶层厚度0.0880.0891.1

Fig.9

Schematic diagram of adhesive layer length?thickness"

Fig.10

Adhesive layer length?thickness curve"

Fig.11

Stress nephogram of the adhesive layer"

Fig.12

Time?adhesive layer thickness curve at point A"

Fig.13

Time?adhesive layer thickness curves at points B, C and D"

Fig.14

Cross?sections of joints with different adhesive layer thicknesses"

Fig.15

Interlock values and neck thicknesses of joints with different adhesive layer thicknesses"

Fig.16

Length?thickness curves of adhesive layer in joints with different adhesive layer thicknesses"

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