NDLI: A Shear Compression Disk Specimen with Controlled Stress Triaxiality under Quasi-Static Loading

Content Provider	Springer Nature Link
Author	Dorogoy, A. Karp, B. Rittel, D.
Copyright Year	2011
Abstract	This paper introduces a double shear axisymmetric specimen (Shear Compression Disk) and the methodology to extract flow and fracture properties of ductile materials, under various stress triaxiality levels. A thorough numerical investigation of the experimental set-up is performed, which reveals that the stresses are quite uniformly distributed in the gauge section during all the stages of the test. The attainable level of stress triaxiality (with pressures of up to 1.9 GPa) ranges from −0.1 to 1, which can be adjusted by a proper choice of geometrical parameters of the specimen. The methodology is implemented to quasi-static experiments on 4340 Steel and Aluminum 7075-T651 specimens. The flow properties are compared to those obtained by upsetting cylinders and show a very good agreement. For these materials it is observed that, contrary to the fracture strain, the flow properties are quite insensitive to the level of stress triaxiality. The fracture strain of the aluminum alloy increases with triaxiality and may be fitted with an exponential polynomial of the type suggested by [27]. These examples demonstrate the potential of the new specimen to obtain flow and fracture properties of ductile materials under controlled triaxiality.
Starting Page	1545
Ending Page	1557
Page Count	13
File Format	PDF
ISSN	00144851
Journal	Experimental Mechanics
Volume Number	51
Issue Number	9
e-ISSN	17412765
Language	English
Publisher	Springer US
Publisher Date	2011-03-31
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Triaxiality Ductile fracture Flow properties Finite elements Quasi-static loading Characterization and Evaluation of Materials Continuum Mechanics and Mechanics of Materials Optics, Optoelectronics, Plasmonics and Optical Devices Mechanics Structural Mechanics Vibration, Dynamical Systems, Control
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Mechanical Engineering Aerospace Engineering

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