Journal of Jilin University(Engineering and Technology Edition) ›› 2024, Vol. 54 ›› Issue (7): 1887-1893.doi: 10.13229/j.cnki.jdxbgxb.20221323

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Simulation on influence of temperature field on composite glued structure of car interior

Yi LI1(),Ya-sai BAI1,Ji-cai LIANG1,2,Wei-guo YAO1,Ce LIANG1()   

  1. 1.College of Materials Science and Engineering，Jilin University，Changchun 130022，China
    2.Roll Forging Institute，Jilin University，Changchun 130022，China
  • Received:2022-10-10 Online:2024-07-01 Published:2024-08-05
  • Contact: Ce LIANG E-mail:henrylee@jlu.edu.cn;liangce@jlu.edu.cn

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Abstract:

In this paper， the influence of surface temperature on the strength of contact surface is investigated based on the influence of displacement on the quality of overmolded products by simulation software. In the process of research， the model is coupled with temperature and displacement， the loading mode is unchanged， and the temperature and loading displacement are changed. Through comparison， it is found that the simulation results of different displacements have similar characteristics under the same temperature difference. The decrease of temperature will accelerate the damage and failure of adhesive layer， and the value of failure load will increase； Increasing temperature will promote the initial damage of adhesive layer， but delay the failure of adhesive layer and reduce the value of failure load. The increase and decrease of temperature will cause the change of stress， and the change trend is gradually increasing from inside to outside. The peeling force is provided by displacement load and stress in the loading process.

Key words: automobile interior trim, cohesive zone model （CZM）, temperature pattern

CLC Number: 

  • TG356

Fig.1

Local 3D model of dashboard"

Table 1

Material parameters of upper and lower layers"

材料密度/（kg·mm-3）弹性模量/MPa泊松比热导率/［mW·（mm·K）-1］热膨胀系数/［m·（m·K）-1］比热容/［kJ·（kg·K）-1］
PU皮5.58E-830570.450.0341.8E-81.38E3
3D?mesh网格布9E-840000.30.045.94E-51.1E6

Table 2

Material parameters of adhesive layer"

性能

密度

/（kg·mm-3）

杨氏模量

/MPa

断裂能

/（mJ·mm-2）

剪切模量

/MPa

热导率

/［mW·（mm·K）-1］

热膨胀系数

/［m·（m·K）-1］

比热容

/［kJ·（kg·K）-1］

数值1.45E-618504305600.2348.5E-55.5E5

Fig.2

Schematic diagram of grid"

Fig.3

Displacement direction and boundary setting"

Fig.4

Bilinear cohesion model"

Fig.5

Three groups of load-displacement curves under different temperature changes"

Fig.6

Initial stress and final stress at 30 ℃ with 0.5 mm displacement"

Fig.7

Curves of three groups of SDEG and QUADSCRT with time under different temperature changes"

Fig.8

Final stress diagram of three groups of models"

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