Numerical Modeling of Mixed Mode Surface Fracture of Carbonized Fe-0.85M0-03C Steel Subjected to Rolling-Sliding Contact
| dc.contributor.advisor | Samuel, Tesfaye (PhD) | |
| dc.contributor.author | Awet, Gebretsadkan | |
| dc.date.accessioned | 2020-03-06T07:16:01Z | |
| dc.date.accessioned | 2023-11-18T06:29:06Z | |
| dc.date.available | 2020-03-06T07:16:01Z | |
| dc.date.available | 2023-11-18T06:29:06Z | |
| dc.date.issued | 2019-10 | |
| dc.description.abstract | This thesis is a work in which the surface crack propagation on porous carburized pre alloyed steel subjected under rolling-sliding contact was predicted using numerical approach. The effect of contact load, coefficient of frictional on equivalent stress distribution and pressure distributio n is incorporated during FEM analysis In addition, the effect of crack face friction and lubricatio n pressure, in a mixed mode crack propagation is determined at a mean pressure which shows seeking to generalize the parametric influence on the rolling-sliding contact fatigue. Since the material is porous the initial crack is formed at the center of contact with 2D plain strain condition and elliptical contact parameters determines using Hertz contact theory. The pre alloyed carbonized steel material modelling problem is assumed to be taken as the mean value. Surface propagation is analyzed using energy approach with energy based damage evolution is selected for the crack propagation simulation with extended finite element method. The initial crack propagated at a mean maximum pressure and the coefficient of friction effect is seen, which varies the position of maximum equivalent stress along the surface. When crack face and surface contact frictio n decrease, the crack length increases and further increase to a large value under the effect of lubrication pressure that results in facilitating crack propagation. The Comparison between the numerical results with the given experimental result shows consistency at a pressure of 960MPa. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/20930 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Contact stress | en_US |
| dc.subject | Friction | en_US |
| dc.subject | Extended finite Element Method (XFEM) | en_US |
| dc.subject | Crack propagation | en_US |
| dc.title | Numerical Modeling of Mixed Mode Surface Fracture of Carbonized Fe-0.85M0-03C Steel Subjected to Rolling-Sliding Contact | en_US |
| dc.type | Thesis | en_US |