Low-cycle fatigue behaviour of laser welded high-strength steel DOMEX 700 MC

被引：0

作者：

Kopas, Peter ^{[1
]}

Saga, Milan ^{[1
]}

Novy, Frantisek ^{[2
]}

Leitner, Bohus ^{[3
]}

机构：

[1] Univ Zilina, Fac Mech Engn, Dept Appl Mech, Univ 1, Zilina 01026, Slovakia

[2] Univ Zilina, Fac Mech Engn, Dept Mat Engn, Univ 1, Zilina 01026, Slovakia

[3] Univ Zilina, Fac Mech Engn, Dept Tech Sci & Informat, Univ 1, Zilina 01026, Slovakia

来源：

XXII SLOVAK-POLISH SCIENTIFIC CONFERENCE ON MACHINE MODELLING AND SIMULATIONS 2017 (MMS 2017) | 2018年 / 157卷

关键词：

low-cycle fatigue; laser; welding; high-strength steel; NUMERICAL-ANALYSIS; STRAIN; JOINT;

D O I：

10.1051/matecconf/201815705013

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The article presents the results of research on low cycle fatigue strength of laser welded joints vs. non-welded material of high-strength steel DOMEX 700 MC. The tests were performed under load controlled using the total strain amplitude epsilon(ac). The operating principle of the special electro-mechanic fatigue testing equipment with a suitable clamping system was working on 35 Hz frequency. Fatigue life analysis was conducted based on the Manson-Coffin-Basquin equation, which made it possible to determine fatigue parameters. Studies have shown differences in the fatigue life of original specimens and laser welded joints analysed, where laser welded joints showed lower fatigue resistance. In this article a numerical analysis of stresses generated in bending fatigue specimens has been performed employing the commercially available FEM-program ADINA.

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