Journal of the Ergonomics Society of Korea (대한인간공학회지)

Ergonomics Society of Korea (대한인간공학회)
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Optimization of Tactile Material Properties to Improve Affection Satisfaction of Vehicle Interior Materials

자동차 내장 재질의 감성 만족도 향상을 위한 촉각적 물성치의 최적화

  • Park, Jaekyu (LG electronics, Home Appliance & Air Solution Company, Appliance Advanced Technology 4 Team) ;
  • Park, Sungjoon (Namseoul University, Department of Industrial Management Engineering)
  • 박재규 (LG전자 H&A 사업본부 어플라이언스 선행기술4팀) ;
  • 박성준 (남서울대학교 산업경영공학과)
  • Received : 2018.02.07
  • Accepted : 2018.08.21
  • Published : 2018.08.31
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Abstract

Objective: The purpose of this study is to investigate the effects of the roughness, friction coefficient, and hardness, which are typical properties related to tactile affection affecting the interior affective satisfaction for Thermoplastic Olefin (TPO) materials. This study also aims to derive optimal design values to maximize tactile affective satisfaction. Background: There are a variety of design variables related to tactile affection of vehicle interior materials. Previous studies about sensibility engineering for vehicle interior material mainly interested to visual sense, and some studies for tactile sense had limitations performed in actual vehicle conditions where human sensibility could be affected by several noise factors. Therefore, it is necessary to make material's samples considering various levels of design variables related to the material properties, and to determine the optimal design combinations to improve tactile affection. Method: A total of 72 subjects, 59 males and 13 females, participated in this experiment. A total of 18 TPO materials were fabricated to evaluate the affective satisfaction, according to the physical property levels of the interior materials. Affective satisfaction with a sense of touch was used as a dependent variable, and roughness, hardness and coefficient of friction were considered as three independent variables. For 18 samples provided by combinations of three independent variables, the affective satisfaction was measured repeatedly according to the within-subject design. ANOVA and regression analysis were carried out to derive optimal design values for vehicle interior materials. Results: The optimal regression model was derived from the best subset regression analysis, which included hardness and roughness variables. In addition, the optimal design values were predicted through the iso-response contour plots obtained by the response surface model. The optimum tactile affection condition can be provided from the middle level of hardness and the low level of roughness. Conclusion: By suggesting the optimal material property level of TPO material, it is possible to provide improved affective satisfaction that can be felt in high quality interior materials. Application: This study can be used to improve tactile affection for vehicle interior design, and be helpful to cost reduction through replacing artificial leathers by improved TPO materials.

Keywords

References

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