运用应变梯度塑性理论模拟铝多晶体强度及延伸率

Using strain gradient theories of plasticity to simulate aluminium polycrystalline intensity and extension rate

随着现代汽车技术发展，汽车材料要求既有相当的强度也要求质轻。采用铝合金的车身材料是一条出路，因为铝材比钢材轻。在工程实践中，迫切需要解决微米级金属材料性能问题，尤其铝合金的性能。在此论文中运用基于细观机制的应变梯度塑性本构方程对微米级不同晶粒尺寸的铝多晶体的强度及均匀延伸率进行了分析和模拟研究。

With the development of modem automotive technique, it requires hight intensity and light weight of automotive materials,especially for the performance of aluminium alloy.In this article,it uses strain gradient plasticity constitutive equation to analyse and simulation research on micron-range different dimension for the intensity and even entension rate of aluminium polycrystalline.