While a screw is a fastening element that can tighten the two parts at low cost, the loosening of the screw is generated due to external forces such as repetitive load, vibration, and thermal stress. This phenomenon decreases the initial clamping force, and this can be a serious problem to the safety of the product. However, while fastening parts are handled through experiment and experience, there is a lack of research on the screw loosening of plastic fastening parts. For example, vehicles have various fastening parts. Among the fastening elements, screws are typically used for tightening parts of the vehicle door trim. Vehicle interior materials are mainly composed of plastic parts. Especially, the temperature of the vehicle interior changes from a sub-zero temperature to 100 degrees (°C) due to solar radiation. Unlike metals, plastic materials are commonly susceptible to the environment. In this study, the fastening screw of automotive door trim parts is selected. First, a screw loosening mechanism is implemented through Computer Aided Engineering (CAE) analysis and the influences of degradation are then analyzed. Secondly, the selecting method of clamping force is suggested through the analysis result of reduction according to the tightening torque.
This is a preview of subscription content, access via your institution.
Buy single article
Instant access to the full article PDF.
Tax calculation will be finalised during checkout.
Pai, N. and Hess, D. (2002b). Experimental study of loosening of threaded fasteners due to dynamic shear loads. J. Sound and Vibration 253, 3, 585–602.
Engineering-abc.com Home Page (2015). Coefficient of Friction, Rolling Resistance and Aerodynamics. http://www.tribology-abc.com/abc/cof.htm#mu_friction
In, S. and Park, M. (2001). Tightening characteristics of domestic M8 stainless screws. J. Korea Vacuum Society 10, 2, 155–163.
Jeong, J., Lee, H., Kim, J. and Park, K. (2015). Thread shape design using joining and release analysis of bolt. J. Korean Society for Precision Engineering 32, 6, 523–528.
Junker, G. (1969). New criteria for self-loosening of fasteners under vibration. SAE Trans. 78, 1, 314–335.
Kim, D. (2012). Future of chemical materials by seeing vehicles. SERI Management Note, 146, 1–6.
Kim, K., Choi, K. and Oh, H. (2010). The evaluation of fitness on implant bolt joints as tightening torques. Autumn Conf., Korean Society of Mechanical Engineers, 1786–1791.
Kim, S., Park, J. and Lee, E. (2007). Study on long-term creep behavior of thermoplastics by using time-stresstemperature superposition creep model. Spring and Autumn Conf., Korean Society of Mechanical Engineers, 6–10.
Kindersberger, J., Lobl, H. and Schoft, S. (2000). Plastic deformation and loss of joint force by creep in high current joints. Int. Conf. Electric Contact Phenomena 21, 1, 367–372.
Korea Meteorological Administration (2013). Seoul and Daegwallyeong Temperature Data.
Lang, L., Kang, B., Wang, R. and Lang, B. (2003). Finite element analysis to determine implant preload. J. Prosthetic Dentistry 90, 6, 539–545.
Lee, D., Park, H. and Park, S. (2013). Experimental study on friction characteristics between sliding polymer plates for reduction of stick-and-slip abnormal noise. Polymer(Korea) 37, 5, 642–648.
Pai, N. and Hess, D. (2002a). Three-dimensional finite element analysis of threaded fastener loosening due to dynamic shear load. Engineering Failure Analysis 9, 4, 383–402.
Park, S. and Oh, H. (2011). Design of an insertion part for preventing the loosening of screw thread in bolted joint. The Society of CAD/CAM Engineers Conf., 1018–1025.
Park, S., Kim, H. and Ham, S. (2013). A study on the screw loosening torque according to the type of tightening the implant fixture and abutment. J. Korean Academy of Dental Technology 35, 3, 201–207.
Park, Y. (2000). Creep characteristics of plastic materials and design application. Polymer J. Fall, 7–13.
Seo, J., Kang, K., Chun, H. and Han, C. (2007). Study of an analytical model for screw loosening mechanism of dental implants. Spring and Autumn Conf., Korean Society of Mechanical Engineers, 737–742.
Song, H., Chung, W., Jung, D. and Seo, Y. (2010). Optimum shape design of the spring to improve the loose-proof performance of the lock nut. Trans. Korean Society of Automotive Engineers 18, 2, 91–96.
Tsuruoka, M. (2008). Tohnichi Torque Handbook. Vol. 7. Tohnichi Mfj Co., 28–39.
Versluis, A., Korioth, T. and Cardoso, A. (1999). Numerical analysis of a dental implant system preloaded with a washer. Int. J. Oral. Maxillofac. Implants 14, 3, 337–341.
About this article
Cite this article
Yang, S.M., Yoo, S.H., Gi, D.S. et al. Loosening analysis for fastening screw of automotive door trim parts. Int.J Automot. Technol. 17, 671–679 (2016). https://doi.org/10.1007/s12239-016-0066-1
- Clamping force
- Plastic fastening parts