Investigation of fatigue crack growth under in-phase loading as well as phase-shifted loading using cruciform specimens

被引：15

作者：

Wolf, Carl H. ^{[1
]}

Henkel, Sebastian ^{[1
]}

Burgold, Andreas ^{[2
]}

Qiu, Yangxi ^{[1
]}

Kuna, Meinhard ^{[2
]}

Biermann, Horst ^{[1
]}

机构：

[1] Tech Univ Bergakad Freiberg, Inst Mat Engn, Gustav Zeuner Str 5, D-09599 Freiberg, Germany

[2] Tech Univ Bergakad Freiberg, Inst Mech & Fluid Dynam, Lampadiusstr 4, D-09599 Freiberg, Germany

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2019年 / 124卷

关键词：

Fracture mechanics; Fatigue crack growth; Cruciform specimen; Crack branching; Out-of-phase loading; Mixed mode; Biaxial testing; BIAXIAL FATIGUE; MODE II; BEHAVIOR; STRESS; STRAIN; PATHS; DEFORMATION; PROPAGATION; SIMULATION; SUBJECT;

D O I：

10.1016/j.ijfatigue.2019.03.011

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The present study examines the effect of planar biaxial loadings on fatigue crack growth in an austenitic stainless steel and an aluminum alloy. Furthermore, phase-shifted loading with different phase shifts phi is considered. The tests were carried out on planar cruciform specimens with centered notches parallel to one loading axis or aligned with an angle of alpha = 45 degrees to both loading axes and a measurement area of 125 mm x 125 mm. The specimens were tested with a constant force amplitude and load ratios of R = 0.1 or R = 0.5 on a servo-hydraulic biaxial tension-compression system with two perpendicular loading axes. The change from in-phase to out-ofphase loading led to a mixed-mode situation with changing Mode I and Mode II portions during each cycle at the crack tip. This resulted in kinking or branching of the crack path. In addition, the crack tip coordinates of the individual tests for different load cycles N are attached as supplementary material.

引用

页码：595 / 617

页数：23

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