Relevant factors affecting the direction of crack propagation in complete contact problems under fretting fatigue Articles uri icon

publication date

  • March 2019

start page

  • 343

end page

  • 352

volume

  • 131

International Standard Serial Number (ISSN)

  • 0301-679X

Electronic International Standard Serial Number (EISSN)

  • 1879-2464

abstract

  • In fatigue problems, an accurate estimation of the propagation direction is important for life prediction. We identify the most relevant factors that affect the crack orientation during the propagation stage of fretting fatigue cracks, arising from complete contacts. Contrary to what initially expected, parameters such as normal load, cyclic bulk load, etc. do not have a noticeable influence on the orientation. However the relative Young's moduli of indenter/specimen materials, the indenter width and the surface coefficient of friction are the most influencing factors. Analyses are performed through the extended finite element method (X-FEM) and an orientation criterion for non-proportional loading proposed by the authors. Experimental fretting fatigue tests confirm the predicted trends. An explanation of this behaviour is also given.

subjects

  • Mechanical Engineering

keywords

  • fretting fatigue; complete contact; crack propagation; orientation criterion; extended finite element method; finite-element-method; life; prediction; criterion; initiation; fracture; growth; design