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Experimental and finite element analysis of stress amplitude on fretting fatigue behavior of Al Zn Mg alloy

XIAOSONG JIANG1,* , JINGRUI LI1, WANXIA LIU1, DEGUI ZHU1

Affiliation

  1. School of Material s Science and Engineering, Southwest Jiaotong University Chengdu Si c huan 610031 China

Abstract

Fretting fatigue behavior of Al Zn Mg alloy is investigated with experimental and finite element analysis. Fretting fatigue tests are systematically performed for Al Zn Mg alloy, and effects of stress amplitude on fretting fatigue characteristics and fretting fatigue lives are emphatically researched. The results indicate when its contact stress is 180MPa, with increas ing of stress amplitude, the degree of cyclic so ftening increases, and fretting fatigue lives decrease with increase of stress amplitude. Based on fretting fatigue test apparatus with point contact, ANSYS finite element analysis is used to analyze stress distribution by numerical study using 2D finite e lement method. The calculation results indicate that there are sticking region, sliding region and opening region on contact surface with stress amplitude changing during other test parameters are invariable. The sticking region, sliding region and opening region change with stress amplitude changing T he tensile stress and shear stress change very fiercely at the mixing region between sticking region and sliding region where the propagating cracks would nucleate at the region. The predicted fretting fatigu e behavior of Al Zn Mg alloy show good agreement with experimental results..

Keywords

Al-Zn-Mg alloy, Fretting fatigue, Finite element analysis, Point contact, ANSYS.

Citation

XIAOSONG JIANG, JINGRUI LI, WANXIA LIU, DEGUI ZHU, Experimental and finite element analysis of stress amplitude on fretting fatigue behavior of Al Zn Mg alloy, Optoelectronics and Advanced Materials - Rapid Communications, 11, 3-4, March-April 2017, pp.267-273 (2017).

Submitted at: June 10, 2014

Accepted at: April 6, 2017