泡沫铜压缩屈服强度有限元计算方法

发布时间：2018-03-06 17:30

本文选题：泡沫铜　切入点：显微计算机断层扫描　出处：《粉末冶金技术》2017年01期 　论文类型：期刊论文

【摘要】：以超声波辅助电沉积工艺制备得到的泡沫铜为研究对象,利用X射线显微计算机断层扫描(computed tomography,micro-CT)技术和数字图像处理技术,实现了对泡沫铜结构的三维重构,并通过有限元软件建立了与电沉积泡沫铜的真实三维结构相一致的有限元简化模型—十四面体三棱柱模型。基于十四面体三棱柱模型,开展了对泡沫铜压缩屈服强度的有限元计算方法研究,深入探讨了十四面体三棱柱单胞模型引起的应力分布变化,建立了屈服强度与孔隙率之间的定量关系。通过对模型进行主动设计,提出了力学性能更为优异的十四面体圆柱模型,为3D打印制备高性能泡沫金属提供了模型参考。
[Abstract]:Taking the foam copper prepared by ultrasonic assisted electrodeposition process as the research object, the three-dimensional reconstruction of the foam copper structure was realized by using the X-ray microcomputed tomography micro-CTs technique and digital image processing technology. A simplified finite element model, which is consistent with the true three-dimensional structure of electrodeposition of copper foam, is established by finite element software, which is based on the ten-tetrahedron trihedral prism model. The finite element method for calculating the compressive yield strength of foamed copper is studied, and the stress distribution caused by the tetrahedral triprism cell model is discussed in depth. The quantitative relationship between yield strength and porosity is established. Through the active design of the model, a ten-tetrahedral cylinder model with better mechanical properties is proposed, which provides a model reference for 3D printing preparation of high performance foam metal.
【作者单位】：钢铁研究总院高温材料研究所;
【分类号】：TB115

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