通过开展抗凹性能仿真分析,获得汽车板抗凹性能与材料厚度和强度的关系。首先利用半球形钢制压头以10 mm/min速度对抗凹试样进行加载,通过载荷-位移曲线分析获得DC53D+Z初始刚度和失稳凹陷载荷数据。然后基于Ls-dyna建立抗凹试验有限元...通过开展抗凹性能仿真分析,获得汽车板抗凹性能与材料厚度和强度的关系。首先利用半球形钢制压头以10 mm/min速度对抗凹试样进行加载,通过载荷-位移曲线分析获得DC53D+Z初始刚度和失稳凹陷载荷数据。然后基于Ls-dyna建立抗凹试验有限元模型,并获得了较高的仿真精度,初始刚度和失稳凹陷载荷仿真分析误差分别为0.7%和2.2%。其次基于该有限元模型分别获得了DC53D+Z,HC180BD+Z,HC300/500DPD+Z三种汽车板以及0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm四个厚度下的初始刚度和失稳凹陷载荷仿真结果。最后通过仿真结果对比分析获得了抗凹性能与材料厚度、强度之间的关系。研究表明:初始刚度与材料厚度呈线性关系,与材料屈服强度无关,失稳凹陷载荷与材料厚度和屈服强度呈幂函数关系。展开更多
With the rapid development of the automobile industry, the use of galvannealed and galvanized steel sheets in automobiles is on the rise. These sheets must meet very high surface quality requirements. The surface trea...With the rapid development of the automobile industry, the use of galvannealed and galvanized steel sheets in automobiles is on the rise. These sheets must meet very high surface quality requirements. The surface treatment of line rolls is known to have a great impact on strip quality. To prevent dusts such as zinc ash from pressing into the strip surface, we used a composite thermal spray surface treatment technique to treat rolls. The successfully developed tungsten carbide （WC） ＋ Ni-P composite plating technology improved the quality of the tungsten carbide thermally sprayed WC roll surface. This technique is also helpful to control defects such as adhered foreign materials in hot-dip galvanized automobile outer panel surfaces.展开更多
文摘通过开展抗凹性能仿真分析,获得汽车板抗凹性能与材料厚度和强度的关系。首先利用半球形钢制压头以10 mm/min速度对抗凹试样进行加载,通过载荷-位移曲线分析获得DC53D+Z初始刚度和失稳凹陷载荷数据。然后基于Ls-dyna建立抗凹试验有限元模型,并获得了较高的仿真精度,初始刚度和失稳凹陷载荷仿真分析误差分别为0.7%和2.2%。其次基于该有限元模型分别获得了DC53D+Z,HC180BD+Z,HC300/500DPD+Z三种汽车板以及0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm四个厚度下的初始刚度和失稳凹陷载荷仿真结果。最后通过仿真结果对比分析获得了抗凹性能与材料厚度、强度之间的关系。研究表明:初始刚度与材料厚度呈线性关系,与材料屈服强度无关,失稳凹陷载荷与材料厚度和屈服强度呈幂函数关系。
文摘With the rapid development of the automobile industry, the use of galvannealed and galvanized steel sheets in automobiles is on the rise. These sheets must meet very high surface quality requirements. The surface treatment of line rolls is known to have a great impact on strip quality. To prevent dusts such as zinc ash from pressing into the strip surface, we used a composite thermal spray surface treatment technique to treat rolls. The successfully developed tungsten carbide （WC） ＋ Ni-P composite plating technology improved the quality of the tungsten carbide thermally sprayed WC roll surface. This technique is also helpful to control defects such as adhered foreign materials in hot-dip galvanized automobile outer panel surfaces.
