本项目紧密结合汽车轻量化国家重大需求，以高性能铝合金车身覆盖件成形成性一体化为目标，以东风汽车全铝车身电动轿车覆盖件成形为研究载体，通过理论分析、数值模拟与工艺实验，研究铝合金变形本构关系及成形缺陷形成机理，研究铝合金车身覆盖件冷/热成形过程中组织性能遗传演化规律，研究铝合金车身覆盖件多工序成形过程中几何精度的传递模型；揭示板材组织特征的遗传效应对覆盖件成形性能的作用机理，揭示铝合金车身覆盖件多工序成形过程中模具对几何精度的约束与协调机理，阐明铝合金车身覆盖件组织性能与成形几何精度间协同控制机制，建立车身覆盖件材料—工艺—精度性能一体化设计理论和方法，发展高性能铝合金车身覆盖件成形新技术。本项目研究对于解决高性能车身覆盖件用铝合金板材组织性能调控及成形性关键技术难题，构建高性能铝合金车身覆盖件成形理论、技术与应用协同创新平台，促进我国汽车轻量化技术应用和发展具有重要意义。

This program combines the national fundamental requirement of automotive lightweight tightly. The goal is the forming integration of high performance aluminum alloy automotive body panels. The deformation of the body panels for Dongfeng electronic car with an aluminum body is chosen as the research target. The constitutive equations of aluminum alloy sheets and the mechanism of forming defects are studied by theoretical analysis, numerical simulation and process experiments. The genetic evolution law of microstructure is revealed during the cold/hot forming process of aluminum alloy body panels. The transfer model of geometric accuracy is obtained during multistep forming process of aluminum alloy body panels. The hereditary effects of microstructure characteristics on panels forming performance is revealed, and also the constraints and coordination mechanism of dies on geometric accuracy during multistep forming process of aluminum alloy body panels is exhibited. It is explained of the coordination control rule of microstructure properties and forming geometric accuracy of aluminum alloy body panels. The design theory and method are established for the integration of material-process-accuracy/performance for body panels. The new technology of the deformation for high performance aluminum alloy car body panels is developed. This project shows significant effect on solving the key technological problems on the control of microstructure performance and forming of aluminum alloy sheets for high performance aluminum alloy car bodies. The project establishes the collaborative innovation platform of the deformation theory, technology and application for high performance aluminum alloy car body panels, promoting the technological application and development of the automotive lightweight in China.