Investigation of Factors Controlling the Attainable Equivalent Plastic Strain in the Gauge Region of Cruciform Specimens

2018-01-0809

04/03/2018

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WCX World Congress Experience
Authors Abstract
Content
The maximum equivalent plastic strain (EPSmax), which can be achieved in the gauge region of a cruciform specimen during in-plane biaxial tensile tests, is limited due to early fracture on the cruciform specimen arm. In this paper, a theoretical model was proposed to determine the factors related to the EPSmax of a cruciform specimen following ISO 16842: 2014. Biaxial tensile tests were carried out to verify the theoretical analyses. Results show that the material strength coefficient (k) has no effect on the EPSmax, and EPSmax increases with the increase of the material hardening exponent (n) and the cross-sectional-area ratio (c) of the arm region to the gauge region. It is found that the applied load ratio (α) has an effect on EPSmax, which decreases as the load ratio increases from 0:1 (i.e. uniaxial tension) to 1:2 (i.e. plane strain state) and then increases as the load ratio increases to 1:1 (i.e. balanced biaxial tension).
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DOI
https://doi.org/10.4271/2018-01-0809
Pages
6
Citation
Tang, H., Hou, Y., Lin, J., Min, J. et al., "Investigation of Factors Controlling the Attainable Equivalent Plastic Strain in the Gauge Region of Cruciform Specimens," SAE Technical Paper 2018-01-0809, 2018, https://doi.org/10.4271/2018-01-0809.
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Publisher
Published
Apr 3, 2018
Product Code
2018-01-0809
Content Type
Technical Paper
Language
English