Fatigue life of welded high-strength steels under Gaussian loads

被引：6

作者：

Moeller, Benjamin ^{[1
]}

Wagener, Rainer ^{[2
]}

Hrabowski, Jennifer ^{[3
]}

Ummenhofer, Thomas ^{[3
]}

Melz, Tobias ^{[1
,2
]}

机构：

[1] Tech Univ Darmstadt, Syst Reliabil & Machine Acoust SzM, Magdalenenstr 4, D-64289 Darmstadt, Germany

[2] Fraunhofer Inst Struct Durabil & Syst Reliabil LB, D-64289 Darmstadt, Germany

[3] Karlsruhe Inst Technol, KIT Steel & Lightweight Struct, Res Ctr Steel Timber & Masonry, D-76131 Karlsruhe, Germany

来源：

3RD INTERNATIONAL CONFERENCE ON MATERIAL AND COMPONENT PERFORMANCE UNDER VARIABLE AMPLITUDE LOADING, VAL 2015 | 2015年 / 101卷

关键词：

low cycle fatigue; high-strength fine-grained steels; welded butt joints; tubular sample components; Gaussian load spectra; linear damage accumulation; Palmgren-Miner-Elementary;

D O I：

10.1016/j.proeng.2015.02.035

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Within the scope of the investigation of welded high-strength steels for application in crane structures, a Gaussian-like test spectrum is derived from an analysis of recorded load time histories. In addition to stress-controlled fatigue tests under constant amplitude loading, the test spectrum is used for the experimental investigation of MAG-welded butt joints and tubular sample components under variable amplitude loading. A linear damage accumulation using Palmgren-Miner-Elementary is conservative for a damage sum of D = 0.5. Application of the theoretical damage sum D-th = 1 results in a closer approximation of the Gassner-curve. For further improvement of this approximation, a rotation of the calculated Gaaner-curve, i.e. a variable damage sum, is suggested for both butt joints and sample components. (C) 2015 The Authors. Published by Elsevier Ltd.

引用

页码：293 / 301

页数：9

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