中厚船舶钢板激光弯曲成形几何效应的数值模拟

建立板材激光弯曲的三维非线性准静态弹塑性热力耦合有限元模型。使用有限元软件 MSC Marc对中厚船舶钢板的激光弯曲成形过程进行数值模拟。计算了船舶钢板激光弯曲成形过程的温度场和变形场, 并进行相应的实验验证。模拟结果与实验结果吻合较好。用建立的模型对中厚船舶钢板的激光弯曲成形过程中钢板的几何效应进行数值模拟, 讨论了一定工艺条件下钢板几何参数与弯曲角度之间的关系, 为在将来实际生产中制定和优化钢板激光弯曲成形的工艺参数提供理论依据。

Numerical simulation of geometrical effects in laser bending process of moderately thick shipbuilding steel plate

A 3-D nonlinear quasi-static elastic-plastic thermo-mechanical coupled finite element model was developed. Numerical simulation of laser bending process of moderately thick shipbuilding steel plate was carried out using the finite element software MSC.Marc. The temperature field and the displacement field of laser bending process of shipbuilding steel plates were calculated using the model. The corresponding experiments were carried out. The simulated results agreed well with the experimental results. Geometrical effects of plates were simulated numerically using the founded model. The relationships between bending angle of plates and geometrical parameters were discussed under certain technical conditions during the laser bending process. The results will lay a theoretic foundation for optimizing technical parameters of laser bending process of steel plate in future manufacturing process.