EFFECT OF DYNAMIC LOADING ON FRACTURE BEHAVIOR OF WELDED JOINTS OF STRUCTURAL STEEL

被引：0
|
作者：
Zhang LiZhang YufengHuo LixingSchool of Material Scienceand Engineering
机构：
来源：
Chinese Journal of Mechanical Engineering | 2004年 / 03期
基金：
中国国家自然科学基金;
关键词：
Dynamic loading Fracture toughness Finite element analysis Earthquake resistance;
D O I：
暂无
中图分类号：
TG441 [一般方法];
学科分类号：
080201 ; 080503 ;
摘要：
To investigate the effect of dynamic loading on fracture behavior of welded joints of structural steel Q23SB and 16Mn in common use and compare the earthquake resistances of the two kinds of materials, dynamic tension and fracture toughness tests are carried out at room temperature. On the basis of the tests, the stress-strain fields near the crack tip of the compact specimens are analyzed by three-dimensional finite element model. The test results and finite element analysis results show that, the fracture toughness of welds and base metal of 16Mn steel increases with the increment of loading rate. Compared with 16Mn steel, Q235B steel is more sensitive to dynamic loading. The fracture toughness of welds of Q235B is comparatively low under static loading and dynamic loading at room temperature. Compared with the static loading, the fracture toughness of Q235B parent metal under dynamic loading decreases by about four times. Therefore, it can be concluded that compared with 16Mn steel, the earthquake re
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收藏
页码：346 / 348
页数：3
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