Low cycle fatigue behavior of Ti-Mn alloys: Cyclic stress-strain response

Gears are mechanical components which experience high dynamic loading during their exploitation period. Therefore, their load carrying capacity together with life expectancy are often the main research interest in various studies. The research presented in this paper is focused on the materials response in spur gears tooth root, with the attention given to the repeated overloads during gears operation. In order to simulate low cycle fatigue by using numerical modeling of stress - strain relationship within material, the material model which takes into account isotropic and kinematic hardening is used here. Material response of specimens produced out of steel 42CrMo4 in different loading conditions is used for the calibration of material model, which is then applied to simulate damage initiation and materials stress - strain response in gears tooth root. The results show that materials response to the given loading conditions non-linearly change through the loading cycles.

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The effect of aging and cold working on the high-temperature low-cycle fatigue behavior of alloy 800H: Part I. The effect of hardening processes on the initial stress-strain curve

Metallurgical Transactions A ◽

10.1007/bf02649836 ◽

1978 ◽

Vol 9 (7) ◽

pp. 927-934 ◽

Cited By ~ 2

Author(s):

R. E. Villagrana ◽

J. L. Kaae ◽

J. R. Ellis ◽

P. K. Gantzel

Keyword(s):

High Temperature ◽

Initial Stress ◽

Cold Working ◽

Low Cycle Fatigue ◽

Fatigue Behavior ◽

Strain Curve ◽

Cycle Fatigue ◽

Stress Strain Curve ◽

Alloy 800H ◽

Stress Strain

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High Temperature, Low Cycle Fatigue Characterization of P91 Weld and Heat Affected Zone Material

Journal of Pressure Vessel Technology ◽

10.1115/1.4025943 ◽

2014 ◽

Vol 136 (2) ◽

Cited By ~ 17

Author(s):

T. P. Farragher ◽

S. Scully ◽

N. P. O'Dowd ◽

C. J. Hyde ◽

S. B. Leen

Keyword(s):

High Temperature ◽

Weld Metal ◽

Heat Affected Zone ◽

Low Cycle Fatigue ◽

Base Material ◽

Strain Response ◽

Cycle Fatigue ◽

Stress Strain ◽

Weld Material ◽

The Cross

The high temperature low cycle fatigue behavior of P91 weld metal (WM) and weld joints (cross-weld) is presented. Strain-controlled tests have been carried out at 400 °C and 500 °C. The cyclic behavior of the weld material (WM) and cross-weld (CW) specimens are compared with previously published base material (BM) tests. The weld material is shown to give a significantly harder and stiffer stress–strain response than both the base material and the cross-weld material. The cross-weld tests exhibited a cyclic stress–strain response, which was similar to that of the base material. All specimen types exhibited cyclic softening but the degree of softening exhibited by the cross-weld specimens was lower than that of the base material and all-weld tests. Finite element models of the base metal, weld metal and cross-weld test specimens are developed and employed for identification of the cyclic viscoplasticity material parameters. Heat affected zone (HAZ) cracking was observed for the cross-weld tests.

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