|Table of Contents|

Experimental Study on Mechanical Properties of Q460C High Strength Steel Considering Effect of Strain Aging(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2022年05期
Page:
122-131
Research Field:
结构工程
Publishing date:

Info

Title:
Experimental Study on Mechanical Properties of Q460C High Strength Steel Considering Effect of Strain Aging
Author(s):
WANG Yan1; 2;  LI Ke-hao1; 2;  YANG Yi-ting1; 2
(1. School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, Shandong, China; 2. Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone,Qingdao University of Technology, Qingdao 266033, Shandong, China)
Keywords:
Q460C high strength steel;  stress-strain constitutive model;  Ramberg-Osgood model;  pre-strain;  aging
PACS:
TU391
DOI:
10.19815/j.jace.2021.04043
Abstract:
To further study the effect of strain aging on the basic mechanical properties of Q460C high strength steel and establish the stress-strain constitutive relationship curve of Q460C high strength steel considering the effect of strain aging, the effect of strain aging on Q460C high strength steel was studied by experiment. The mechanical properties of Q460C high strength steel after strain aging were analyzed. The experimental results were fitted by modified Ramberg-Osgood model.The results show that Q460C steel has a significant strain hardening phenomenon after pre-straining, the yield strength is greatly improved, the ultimate strain and fracture strain are significantly reduced, the yield-strength ratio is closed to 1.0, and the possibility of brittle fracture is increased. Age hardening occurs in Q460C steel after aging. The difference of stress-strain curves between different aging is small. The hardening degree of Q460C steel after age hardening is lower than that of strain hardening. The modified Ramboerg-Osgood model can accurately fit the stress-strain curve of high strength steel after pre-strain and aging, and it is in good agreement with the experimental results. The research contents can provide reference for relevant engineering application and theoretical analysis.

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Last Update: 2022-09-30