| 高强钢薄壁管梁结构轴向冲击性能的数值分析 |
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| 引用本文： | 李楠,李建康.高强钢薄壁管梁结构轴向冲击性能的数值分析[J].江苏大学学报(自然科学版),2010,31(2). |
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| 作者姓名： | 李楠 李建康 |
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| 作者单位： | 1. 中国人民武装警察部队学院,消防工程系,河北,廊坊,065000
2. 江苏大学,理学院,江苏,镇江,212013 |
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| 基金项目： | 国家自然科学基金资助项目(10672068) |
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| 摘 要： | 以点焊连接闭口帽形结构为例,选择3种典型高强钢材料,比较了不同板厚结构的轴向冲击特性.分析了冲压成形过程造成的帽形结构局部几何和材料属性变化,对该过程进行了数值仿真,将成形结果映射至碰撞仿真模型中,比较了成形因素对不同模型的影响,并与理论解析解进行了比较.研究结果表明:冲压成形过程导致结构局部减薄和材料加工硬化,对双相钢的影响最为明显;引入成形因素改变了轴向冲击变形的屈曲方式和后继变形模式,在先进高强钢材料的碰撞仿真中不可忽视;平均冲击力数值仿真结果与理论解析解存在一定偏差,但均表明双相钢具有更优良的变形吸能特性.
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| 关 键 词： | 碰撞 冲压 塑性变形 屈服强度 耦合 数值仿真 |
Numerical analysis on axial crash performance of thin-walled high strength steel column structures |
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| Li Nan,Li Jiankang.Numerical analysis on axial crash performance of thin-walled high strength steel column structures[J].Journal of Jiangsu University:Natural Science Edition,2010,31(2). |
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| Authors: | Li Nan Li Jiankang |
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| Institution: | Li Nan1,Li Jiankang2 |
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| Abstract: | Thin-walled column structures absorb large amount of energies during vehicle collision,and it is necessary to study the impact properties of these structures with the extensive use of advanced high strength steels.Spot-welded closed-hat structures made of three grades of high strength steels were selec-ted,and their axial crash performances with different sheet thickness were compared.The changes of local geometry and material property caused by stamping were investigated,then the numerical simulation of st... |
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| Keywords: | crash stamping plastic deformation yield strength couplings numerical simulation |
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