Pre-strain effect of on fracture performance of high-strength steel welds

被引：8

作者：

An, Gyubaek ^{[1
]}

Park, Jeong-Ung ^{[2
]}

Ohata, Mituru ^{[3
]}

Minami, Fumiyoshi ^{[4
]}

机构：

[1] Chosun Univ, Dept Naval Architecture & Ocean Engn, Gwangju, South Korea

[2] Chosun Univ, Dept Civil Engn, Gwangju, South Korea

[3] Osaka Univ, Dept Engn Mat & Mfg Sci, Suita, Osaka, Japan

[4] Osaka Univ, Joining & Welding Res Inst, Suita, Osaka, Japan

来源：

JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | 2018年 / 32卷 / 07期

关键词：

Pre-strain; Fracture toughness; High-strength steel; CTOD (crack tip opening displacement); Great earthquake; Brittle fracture; TOUGHNESS;

D O I：

10.1007/s12206-018-0617-7

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Fracture toughness of pre-strain effect was determined as a function of the temperature in structural steels of the 600 to 780 MPa class. Cyclic loading during earthquakes produces pre-strain in the component, which is enhanced at the region of strain concentration. During the Kobe Great Earthquake in 1995 in Japan, 10 to 15 % pre-strain was recorded at the beam-to-column connection. The relationship between critical CTOD and CGHAZ length was sampled by fatigue pre-crack for pre-strained HAZ, which is a significant decrease compared to that of the base metal. Furthermore, the effect of pre-strain is discussed in terms of the CTOD and Charpy impact energy of the local brittle zone.

引用

页码：3145 / 3151

页数：7

共 19 条

[1]

AIJ. Steel Committee of Kinki Branch, 1995, REC REP DAM STEEL ST

[2]

Anami K., 2001, Progress in Structural Engineering and Materials, V3, P86, DOI DOI 10.1002/PSE.52

[3]

[Anonymous], 1999, 7448 BS

[4]

[Anonymous], 2008, 2808 WES