中文摘要：

整体壁板成形是大飞机制造的关键难题之一。本文探索了激光辅助预应力成形方法应用于整体壁板这一类筋条加强结构工件的可行性。该方法的原理是：首先对整体壁板施加弹性载荷,然后用激光束扫描并加热其弹性变形能集中区域,通过降低该区域材料的屈服极限促使弹性变形能转化为塑性功,实现整体壁板的塑性成形。对网格筋条加强结构试件进行了激光辅助预应力成形试验和有限元分析以及时效成形试验,验证了激光辅助预应力成形方法的可行性,并讨论了激光扫描道次与工件成形效率的关系。

英文摘要：

The forming of integral panels is one of the key issues in the manufacture of large passenger aircraft. This article investigates the feasibility of laser-assisted pre-stress forming applied to integral panels as stiffened structural work pieces. The mechanism of such forming methodology can be described as follows： in the forming process, after elastic stresses are applied to an integral panel, the regions with concentrated elastic energies are irradiated with laser beams, and thus the yield strength of such regions is decreased. Consequently, the elastic energies are dissipated into plastic work to realize the formation of the integral panel. Experiments on both laser-assisted pre-stress forming and age forming of the samples with grid stiffened structures are performed and reported. The feasibility of laser-assisted prestress forming is validated and the relationship is discussed between the forming efficiency and the number of laser scanning procedure.