泡沫金属三维细观有限元建模技术研究

针对泡沫金属复杂随机的内部结构特征，基于计算机断层扫描技术（CT），开展了泡沫金属的三维细观有限元建模技术研究。对泡沫金属的断层扫描图片进行处理，得到二值图，并提取灰度建立其点云模型，再对点云模型实体化得到细观数值模型。开展了泡沫金属的准静态压缩试验，对细观有限元模型进行了验证。试验与仿真结果吻合良好，表明建立的细观有限元模型可以准确地模拟泡沫金属的力学特性。

Investigations and Mesoscopic Modelling of Metal Foams

The 3D finite element analysis was carried out for metal foams based on computer tomography (CT).Initially the tomographic images of the metal foam were processed to obtain the binary images, and the gray level was extracted to establish the point cloud model. And then the point cloud model was meshed into the finite element model. Finally, a quasi-static compression test was performed on the metal foam to verify the mesoscopic finite element model. A good agreement between the experimental data and simulation results was found, indicating that the mesoscopic finite element model established in this paper can accurately simulate the mechanical properties of metal foams.