Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6961563 | Advances in Engineering Software | 2017 | 9 Pages |
Abstract
In the paper, the fatigue performances of as-welded T-joint and T-joint improved by high frequency mechanical impact (HFMI) were numerically investigated using structural hot spot stress approaches: linear surface extrapolation (LSE) and through thickness at the weld toe (TTWT). The effects of main plate thickness and material strength for HFMI-treated joints were investigated. The results showed that the TTWT method was more effective to study the effect of thickness on T-joints improved by HFMI treatment than LSE method. For as-welded T-joints, the thickness correction exponent nâ=â0.04 was obtained when the attachment plate thickness was set as constant. For HFMI-treated T-joints, a reverse thickness effect was observed with negative thickness correction exponents, and the thickness correction exponents increased with material strength. In addition, the adoption of S-N slope varying with yield strength was proven to be more proper for HFMI improvement assessment.
Related Topics
Physical Sciences and Engineering
Computer Science
Software
Authors
Caiyan Deng, Yaru Niu, Baoming Gong, Yong Liu, Dongpo Wang,