论文信息 - 3D Roughness Parameters as Factors in Determining the Evolution of Effective Stress Concentration Factors in Fatigue Processes

3D Roughness Parameters as Factors in Determining the Evolution of Effective Stress Concentration Factors in Fatigue Processes

The influence of machined surface roughness on the fatigue life of S355JR steel has been investigated. The specimen have been machined with three roughness levels and tested under plane fatigue. The surface roughness parameters were used to estimate the effective stress concentration factors Kt using the Arola-Ramulu model and Neuber model. In this paper it is proposed a modification for both models. Based on the experimental results was obtained the evolution of the effective stress concentration factor for the original Arola-Ramulu and Neuber models and also for the modified ones.

Mihaela Buciumeanu | Liviu Palaghian | Valentin Mereuta

[1] Dwayne Arola,et al. IMPROVING FATIGUE STRENGTH OF METALS USING ABRASIVE WATERJET PEENING , 2006 .

[2] Surface roughness evolution under constant amplitude fatigue loading using crystal plasticity , 2005 .

[3] Masaki Nakajima,et al. Effect of surface roughness on step-wise S–N characteristics in high strength steel , 2003 .

[4] P. S. Maiya,et al. Effect of surface roughness on low-cycle fatigue behavior of type 304 stainless steel , 1975 .

[5] David Taylor,et al. THE FATIGUE PERFORMANCE OF MACHINED SURFACES , 1991 .

[6] Dwayne Arola,et al. Estimating the fatigue stress concentration factor of machined surfaces , 2002 .

[7] G. Deng,et al. Evaluation of the Effect of Surface Roughness on Crack Initiation Life , 2013 .