Case Crushing of Carburized and Hardened Gears

Pedersen, Ronnie; Rice, Stephen L.

doi:10.4271/610034

Cited by 30 publications

(9 citation statements)

References 1 publication

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“…Once cracks are generated, they can propagate, becoming macroscopic, or arrest to the microscopic scale. Most of the propagation phase usually occurs along a path parallel to the contact surface, as many evidences show, until cracks deviate towards the surface causing material removal and final failure 1,4,5,10–13 . As several studies show, 5,14–16 this phase of propagation occurs in mode II, given the triaxial compressive stress state (in particular the component parallel to the crack path), that inhibits crack opening displacements (CODs), crack kinking and mode I propagation.…”

Section: Introductionmentioning

confidence: 99%

A numerical approach to subsurface crack propagation assessment in rolling contact

Mazzù

2013

Fatigue Fract Eng Mat Struct

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Subsurface crack mode II propagation parallel to the contact surface is a damage mechanism leading to dramatic failure in many components subjected to cyclic loading. A weight function (WF) was elaborated for calculating the applied mode II stress intensity factor (SIF) of a crack in a two‐dimensional half‐space in plane strain condition, for crack completely closed and frictionless contact between the crack faces. With respect to other methods, the WF allows faster SIF calculation, thus being suitable for simulation of many repeated load cycles and fatigue crack propagation. The WF was applied for simulating a case of rolling contact experiments found in the literature, and good agreement between experimental and numerical results was obtained, showing the effectiveness of the WF method in damage tolerant design.

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Section: Introductionmentioning

confidence: 99%

A numerical approach to subsurface crack propagation assessment in rolling contact

Mazzù

2013

Fatigue Fract Eng Mat Struct

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“…According to (7) the material strength can be determined based on material-physically relations where the local strength values are calculated out of the local Vickers hardness. An alternative simplified method is used in (6), (12), (13), (14), (16) and (19) where the material strength is assumed to be directly proportional to the local hardness. Further influences due to grain size and segregation cannot be considered by the actual state of the art.…”

Section: 3mentioning

confidence: 99%

Tooth flank fracture – basic principles and calculation model for a sub surface initiated fatigue failure mode of case hardened gears

Boiadjiev

Witzig

Tobie

et al. 2014

International Gear Conference 2014: 26th–28th August 2014, Lyon

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“…For these purposes different analytical, semi-analytical and numerical approaches and models have been proposed in literature. Early research such as [6][7][8] significantly based on empirical data and analytical calculation procedures, atempt to take into account various influences in order to offer procedures and guidelines usable for preventing various modes of fatigue damage of differently surface-hardened based gear teeth flanks. In [9] equivalent Von Mises stress is proposed as a relevant parameter whose maximum value needs to be within hardened layer with higher yield stress in order to prevent development of fatigue damage i.e.…”

Section: Introductionmentioning

confidence: 99%

Multiaxial Fatigue Life Calculation Model for Engineering Components in Rolling-Sliding Contact

Basan

Marohnić

2018

MATEC Web Conf.

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Number of important engineering components and elements such as gears, rollers, bearings operate in conditions of rolling-sliding contact loading. Determination of fatigue lives of such components and elements is very important for engineering practice but remains quite chalenging task due to complex states of stress and strain in the material in the vicinity of contact (multiaxiality, non-proportionality, rotation of principal axes, mean compressive stress) as well as complex contact conditions such as loading amplitude, complex geometry of bodies in contact, type of lubrication, value of coefficient of friction, etc. Proposed fatigue life calculation model for cases of rolling-sliding contact is based on critical plane approach in the form of Fatemi-Socie crack initiation criterion. Developed model was implemented in the case of gears teeth flanks in mesh and compared with results and fatigue lives of gears reported in literature. Good agreement was determined confirming validity of developed model. Further advantage of presented approach and developed model is obtained information on critical location(s) and critical plane(s) orientation which can subsequently be used for estimation of crack shapes in initial phases of their growth and later damage type into which they can be expected to develop.

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Case Crushing of Carburized and Hardened Gears

Cited by 30 publications

References 1 publication

A numerical approach to subsurface crack propagation assessment in rolling contact

A numerical approach to subsurface crack propagation assessment in rolling contact

Tooth flank fracture – basic principles and calculation model for a sub surface initiated fatigue failure mode of case hardened gears

Multiaxial Fatigue Life Calculation Model for Engineering Components in Rolling-Sliding Contact

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