原子能科学技术2012，Vol.46Issue(8)：968-971,4.
含缺陷韧性金属材料的失效评估研究
Failure Assessment Research of Flawed Ductile Metals
李铁萍 1王庆 1张春明1
作者信息
- 1. 环境保护部核与辐射安全中心,北京 100082
- 折叠
摘要
Abstract
Standard fracture toughness measurement was explored on contact tension specimen made of ductile metal S355 used for nuclear plant structure. During the test, plastic collapse instead of crack extension occurred ahead of crack tip with increasing tension load and only local area around crack tip yielded when the whole specimen failed. After that, Gurson model was used to simulate the failure process of contact tension specimen made of S355. The calculation results show that Gurson model can reproduce crack tip collapse well. At last, a universal failure assessment curve was built for S355 by combining finite element simulation with test measurement, and relationship between plastic failure load and crack length was determined.关键词
断裂韧性/塑性垮塌/Gurson模型/失效评估曲线/塑性失效载荷Key words
fracture toughness/ plastic collapse/ Gurson model/ failure assessment curve/ plastic failure load分类
数理科学引用本文复制引用
李铁萍,王庆,张春明..含缺陷韧性金属材料的失效评估研究[J].原子能科学技术,2012,46(8):968-971,4.
