| Issue |
MATEC Web Conf.
Volume 179, 2018
2018 2nd International Conference on Mechanical, Material and Aerospace Engineering (2MAE 2018)
|
|
|---|---|---|
| Article Number | 02006 | |
| Number of page(s) | 6 | |
| Section | Materials | |
| DOI | https://doi.org/10.1051/matecconf/201817902006 | |
| Published online | 26 July 2018 | |
A New Characterization Parameter of out-of-plane Constraint for C(T) Specimens
1
School of Science, Xi'an University of Science and Technology, Xi'an 710054, China
2
School of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
a Corresponding author: gloomy2@foxmail.com
As the resistance of structures against the crack-tip plastic deformation, constraints has attracted much attention in the research of material fracture behaviour. In order to increase the accuracy of structural integrity assessment, many characterization parameters of in-plane and out-of-plane constraints have been considered and proposed in the last few decades. Three-dimensional finite element analyses have been conducted for five C(T)50 specimens with different out-of-plane constraint. The distributions of four constraint parameters (σ22/σ0, Tz, h and Dp) along crack fronts were calculated. To characterize the out-of-plane constraint, the capability of constraint parameters such as σ22/σ0, Tz, h and Dp were analyzed and compared. Results show that, compared with the three constraint parameters (σ22/σ0, Tz and h) based on crack-tip stress fields, the parameter Dp based on crack-tip equivalent plastic strain is more sensitive to out-of-plane constraint, and may effectively characterize the out-of-plane constraint.
© The Authors, published by EDP Sciences 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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