Thermoelastic investigations for fatigue life assessment |
| |
Authors: | R A Tomlinson L Marsavina |
| |
Institution: | (1) Department of Mechanical Engineering, University of Sheffield, Mappin Street, S1 3JD Sheffield, UK;(2) University Politechnica Timisoara, Timisoara, Romania |
| |
Abstract: | An investigation is presented on the suitability and accuracy of a thermoelastic technique for the analysis of fatigue cracks.
The stress intensity factor ranges ΔK
I and ΔK
II are determined from thermoelastic data recorded from around the tip of a sharp slot in a steel specimen under biaxial load,
in order to assess the accuracy of the technique. ΔK
I and ΔK
II are determined to within 4% and 9% of a theoretical prediction, respectively. The results from a similar test on a fatigue
crack under biaxial load are also presented. These show that thermoelastic stress analysis is a rapid and accurate way of
analyzing mixed-mode fatigue cracks. A discussion is given on the potential of thermoelastic stress analysis of propagating
cracks. |
| |
Keywords: | Thermoelastic stress analysis (TSA) fatigue cracks biaxial |
本文献已被 SpringerLink 等数据库收录! |