Using Weibull distribution function to determine the design bounds for carburized 4320 steel shafts subjected to bending dominated fatigue loading

Vasu, Anoop; Mei, Jifa; Chung, Julianne; Mehta, Yogesh

doi:10.1016/j.ijfatigue.2022.107447

Cited by 1 publication

(1 citation statement)

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“…Usually, the graph of the curve can be divided into two parts: one is the finite life region, and the other is the infinite life region. The infinite life region means that the stress level of the components is less than or equal to the fatigue limit, while the finite life region means that the stresses are higher than the fatigue stress limit of the material [21], [50], [51]. Equation 4gives the steel's fatigue strength or yield strength ′ S e , which can be approximated from the tensile strength data S ut .…”

Section: Fatigue Analysismentioning

confidence: 99%

Static, Dynamic, and High Cycle Fatigue Analysis of Crossed Spherical Gearing for Robotic Arm Ball Joint: A Finite Element Analysis Approach

Serna-Landivar,

Risco Sernaqué,

Rivas Moreano

et al. 2024

Int. J. Onl. Eng.

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Crossed spherical gearing is used in the joints of robotic arm prostheses and allows mobility in 3 degrees of freedom. This paper aims to evaluate the design of a cross-spherical gear with three different materials, PEEK, AISI 304L, and Ti-6Al-4V, for a robotic arm prosthesis by finite element analysis. ANSYS mechanical software (version 2021 R1) was used to perform the static analysis and evaluate the deformations and stresses, modal analysis of natural frequencies and vibration modes, and high cycle fatigue analysis to determine fatigue resistance. The results obtained in the static analysis show that the maximum stresses are in the same zones for the three materials and have similar values. However, the Ti-6Al-4V and ASI 304L materials have a higher safety factor than PEEK, with a value of 5.17. In conclusion, the crossed spherical gearing is numerically validated using the finite element analysis so that the prototype can be later manufactured at an experimental level, and the values obtained for the crossed spherical gearing of the robotic arm prosthesis can be verified.

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Section: Fatigue Analysismentioning

confidence: 99%