摘要
以中厚钢板为研究对象,采用数学公式推导和实验相结合的方法,在弯曲过程中分析应力和应变中性层内移的基础上,根据弯曲前后体积不变、内外边层应变绝对值的增量与它们到应力中性层的距离成正比这两个条件,推导板厚变化与相对弯曲半径的关系式.比较实验值与公式推导的板厚变化值,得出板厚变化值的经验修正系数,并通过Abaqus软件对选定材料的弯曲进行数值模拟,验证计算方法的正确性.
With integration of the mathematical equation deduction and experimental method for medium- thickness plates, the neutral layer ingressions of stresses and strains are first analyzed during bending process. Based on the unchanged volumes through bending, along with the proportional relation between the absolute strain value increment and stress neutral layer distance of inner and outer boundary layers, the relational equation between plate thickness variation and relative bending radius is then attained. By comparing the experimental values with equation-deduced variations of plate thickness, the revised imperial coefficient of plate variations is next obtained. Finally, the correctness of calculation method is validated via AbaqusTM bendin~ numerical .qimnl^ticm nn ~ol,~,-t,~rt ,-o~,~,-;~1o
出处
《中国工程机械学报》
2013年第6期494-497,共4页
Chinese Journal of Construction Machinery
关键词
中厚板
弯曲
修正系数
数值模拟
medium-thickness plate
bending
revised coefficient
numerical simulation
