Abstract
Based on field data and a tailored set of accelerated life tests, the hinge kit system (HKS) of a closing door in a refrigerator was redesigned to improve its lifetime. Using a force and moment balance analysis, the mechanical impact loads of HKS were calculated in closing the refrigerator door. At first ALT the kit housing in the HKS fractured. When breaking up HKS, oil damper was leaked. The failures of 1st ALT were similar to those of the failed samples obtained in the field. The HKS housing and oil damper was modified. At 2nd ALT, the cover housing fractured. The cover housing in HKS was changed from plastics to Aluminum. After two rounds of parametric ALT with corrective action plans, reliability of the new HKS is guaranteed to be over B1 life 10 years with a yearly failure rate of 0.1%.
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Reference
Woo, S., O’Neal, D.: Reliability design of mechanical systems subject to repetitive stresses. Recent Pat. Mech. Eng. 8(4), 222–234 (2015)
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Woo, Sw. (2019). Improving the Reliability of Design of a Hinge Kit System Subjected to Repetitive Stresses. In: Gdoutos, E. (eds) Proceedings of the First International Conference on Theoretical, Applied and Experimental Mechanics. ICTAEM 2018. Structural Integrity, vol 5. Springer, Cham. https://doi.org/10.1007/978-3-319-91989-8_44
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DOI: https://doi.org/10.1007/978-3-319-91989-8_44
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Online ISBN: 978-3-319-91989-8
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