Q235B钢材的微观损伤模型韧性参数校正
发布时间：2019-01-24 08:55
【摘要】：Q235B钢材在中国建筑领域应用广泛,但目前却缺乏该类钢材的空穴增长模型(VGM模型)和应力修正临界应变模型(SMCS模型)等微观损伤模型韧性参数.为此,取材自热轧无缝钢管以及冷焊钢管母材、热影响区、焊缝区的4种Q235B钢材,加工了8个光滑圆棒试件和24个缺口圆棒试件,通过系列单轴拉伸试验,辅以数值分析及电镜扫描试验,获得了Q235B钢材的VGM和SMCS模型韧性参数,确定了Q235B钢材的特征长度,然后试验验证VGM和SMCS模型对Q235B钢材韧性断裂的预测效果.结果表明:VGM与SMCS模型对Q235B钢材韧性断裂预测效果均很理想.
[Abstract]:Q235B steel is widely used in the field of construction in China, but at present it lacks the toughness parameters of micro-damage model such as hole growth model (VGM model) and stress-modified critical strain model (SMCS model). For this reason, four kinds of Q235B steels, including 4 kinds of Q235B steel materials, including the base metal of cold welded steel tube, the base material of cold welded steel pipe and the steel tube of cold welding, were used for this purpose. Eight smooth round bar specimens and 24 notched round bar specimens were processed, and a series of uniaxial tensile tests were carried out. The toughness parameters of VGM and SMCS models of Q235B steel were obtained by numerical analysis and scanning electron microscope test. The characteristic length of Q235B steel was determined, and the prediction effect of VGM and SMCS models on Q235B steel ductile fracture was verified by experiments. The results show that both VGM and SMCS models are effective in predicting ductile fracture of Q235B steel.
【作者单位】： 北京交通大学土木建筑工程学院;中轻国际工程公司;
【基金】：国家自然科学基金面上项目(51278036) 中国铁路总公司科技研发计划项目(2013T002-A-2) 教育部高等学校学科创新引智计划项目(B13002)
【分类号】：TU511.3
本文编号：2414328
[Abstract]:Q235B steel is widely used in the field of construction in China, but at present it lacks the toughness parameters of micro-damage model such as hole growth model (VGM model) and stress-modified critical strain model (SMCS model). For this reason, four kinds of Q235B steels, including 4 kinds of Q235B steel materials, including the base metal of cold welded steel tube, the base material of cold welded steel pipe and the steel tube of cold welding, were used for this purpose. Eight smooth round bar specimens and 24 notched round bar specimens were processed, and a series of uniaxial tensile tests were carried out. The toughness parameters of VGM and SMCS models of Q235B steel were obtained by numerical analysis and scanning electron microscope test. The characteristic length of Q235B steel was determined, and the prediction effect of VGM and SMCS models on Q235B steel ductile fracture was verified by experiments. The results show that both VGM and SMCS models are effective in predicting ductile fracture of Q235B steel.
【作者单位】： 北京交通大学土木建筑工程学院;中轻国际工程公司;
【基金】：国家自然科学基金面上项目(51278036) 中国铁路总公司科技研发计划项目(2013T002-A-2) 教育部高等学校学科创新引智计划项目(B13002)
【分类号】：TU511.3
【共引文献】
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