Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Improving the Fatigue Design of Mechanical Products Such as Bearings Based on a (Generalized) Life-Stress Prototype and Sample Size

Version 1 : Received: 27 February 2023 / Approved: 28 February 2023 / Online: 28 February 2023 (09:54:15 CET)

A peer-reviewed article of this Preprint also exists.

Woo, S.; O’Neal, D.L.; Hassen, Y.M.; Mebrahtu, G. Enhancing the Fatigue Design of Mechanical Systems Such as Refrigerator to Reserve Food in Agroindustry for the Circular Economy. Sustainability 2023, 15, 7010. Woo, S.; O’Neal, D.L.; Hassen, Y.M.; Mebrahtu, G. Enhancing the Fatigue Design of Mechanical Systems Such as Refrigerator to Reserve Food in Agroindustry for the Circular Economy. Sustainability 2023, 15, 7010.

Abstract

To prolong the fatigue life of a product handled by machine, parametric accelerated life testing (ALT) is mentioned as an organized technique to pinpoint design flaws and minimize fatigue-connected failures. It requires (1) an ALT procedure, (2) fatigue model, (3) parametric ALTs with adjustment, and (4) an approximate of whether present product complete the BX life. The use of a quantum-transported time-to-failure archetype and a sample size are advised. The improvements in the reliability of a refrigerator ice-maker, comprising an auger motor with bearing, were utilized as a case investigation. In the 1st ALT, a steel rolling bearing cracked due to repeated loads under cold circumstances (below −20 C) in the freezer compartment. The bearing was altered by adjusting the matter from AISI 52100 alloy steel with 1.30-1.60% chromium to lubricated sliding bearing with sintered and hardened steel (FLC 4608-110HT) because of its high fatigue strength at lower temperatures. In the 2nd ALT, a helix made of polycarbonates (PCs) fractured. As an adjustment, a reinforced rib of the helix was thickened. As no troubles in the 3rd ALT occur, the lifetime of an ice-maker was proved to be B1 life 10 years.

Keywords

mechanical system; fatigue design; parametric ALT; ice-maker; bearing; design defects

Subject

Engineering, Mechanical Engineering

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