Three Dimensional Plastic Stress Analysis of Reactor Pressure Vessel Nozzle Belt

DOI

10.2991/ifeesm-15.2015.165How to use a DOI?

Keywords

Reactor pressure vessel, Nozzle belt, Actual material stress-strain relationship, Multi-linear kinematic hardening, Plastic limit load

Abstract

Reactor pressure vessel (RPV) is exposed to deadweight, pressure, heat expansion, seismic load, pipe loads and etc under operating , accident and hydrostatic test conditions. Due to geometric discontinuity, the nozzle belt is reluctant to stress concentration, which is the key part in structure analysis. Linear elastic analysis method is dominant in present research of RPV stress analysis. While in some severe cases, it may obtain results which don't satisfy regulations due to the conservative prediction of linear method. Plastic analysis can obtain more reasonable results. In present research, a multi-linear kinematic hardening constitutive model of Ansys with an input of actual material stress-strain relationship is used to simulate the plastic behaviors of RPV nozzle belt. Stress distribution, extension of plastic region and the plastic limit load is obtained which provides theoretical basis for RPV design.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Wei Lu
AU  - Xuwei Wang
AU  - Peiyong Yan
PY  - 2015/09
DA  - 2015/09
TI  - Three Dimensional Plastic Stress Analysis of Reactor Pressure Vessel Nozzle Belt
BT  - Proceedings of the 2015 International Forum on Energy, Environment Science and Materials
PB  - Atlantis Press
SP  - 897
EP  - 904
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeesm-15.2015.165
DO  - 10.2991/ifeesm-15.2015.165
ID  - Lu2015/09
ER  -