| Issue |
MATEC Web Conf.
Volume 300, 2019
ICMFF12 - 12th International Conference on Multiaxial Fatigue and Fracture
|
|
|---|---|---|
| Article Number | 17005 | |
| Number of page(s) | 8 | |
| Section | Variable Amplitude Loading | |
| DOI | https://doi.org/10.1051/matecconf/201930017005 | |
| Published online | 02 December 2019 | |
Establishment of damage estimation rule for brittle fracture after cyclic plastic prestrain in steel
1
The University of Tokyo, Tokyo, Japan
2
Tokyo Electric Power Company, Tokyo, Japan
* Corresponding author: kosuge@fract.t.u-tokyo.ac.jp
Material damage caused by complicated prestrain like cyclic prestrain and various direction prestrain. It is so important to understand the mechanism of material damage for high-precision lifetime evaluation of steel structure. Material damage depends on not only equivalent plastic strain but the order of pestrain loaded. Also, material damage can be expressed by effective damage strain from back stress uploading and total dislocation density calculated from conventional mechanism based on strain gradient plasticity (CMSGP). These ideas can be extended to multiaxial problems and material damage can be estimated by these parameters as well as uniaxial problems.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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