Experimental Study and Prediction Model of Low Temperature Mechanical Properties of High-Strength Steel

被引：0

作者：

Cai, Ao ^{[1
]}

Chen, Mantai ^{[1
]}

Zuo, Wenkang ^{[1
]}

Duan, Liping ^{[1
]}

Zhao, Jincheng ^{[1
]}

机构：

[1] State Key Laboratory of Ocean Engineering, Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai,200240, China

来源：

Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University | 2024年 / 58卷 / 11期

关键词：

Fracture mechanics - High-strength low-alloy steel - Pressure vessels - Steel analysis - Steel structures - Steel testing - Structural members - Tensile strength;

D O I：

10.16183/j.cnki.jsjtu.2022.526

中图分类号：

学科分类号：

摘要：

The application of high-strength steel in extremely cold polar regions can reduce steel consumption and save the cost of fabrication, transportation, and installation of steel structures in the harsh low-temperature environment. In order to study the mechanical properties of HG785 high-strength steel under polar low-temperature conditions, uniaxial tensile tests were conducted on high-strength steel coupons by considering two thicknesses and five low-temperature cases. It was found that the elastic modulus, yield strength, and ultimate tensile strength of HG785 high-strength steel in polar low-temperature environment arc higher than those at an ambient temperature of 25 °C. All tensile coupon specimens failed by traditional necking in a ductile manner without brittle failure tendency. Based on the test results, accurate prediction models for mechanical properties of HG785 high-strength steel in polar low-temperature environment were established by the best subset regression analysis. This will facilitate the application of high-strength steel in the design of structural members, joints, and systems in an efficient manner, and provide theoretical support for the promotion of high-strength steel structures in polar low-temperature regions. © 2024 Shanghai Jiaotong University. All rights reserved.

引用

页码：1707 / 1715

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