Open cell polyurethane foams are often used as cancellous bone surrogates because of their similarities in morphology and mechanical response. In this work, open cell polyurethane foams of three different densities are characterized from morphometric and mechanical perspectives. The analysis of micro-computed tomography images has revealed that the high density foams present the greatest inhomogeneities. Those inhomogeneities promoted the failure location. We have used the finite element models as a tool to estimate elastic and failure properties that can be used in numerical modeling. Furthermore, we have assessed the anisotropic mechanical response of the foams, whose differences are related to the morphometric inhomogeneities. We found significant relationships between morphometry and the elastic and failure response. The detailed information about morphometry, elastic constants and strength limits provided in this work can be of interest to researchers and practitioners that often use these polyurethane foams in orthopedic implants and cement augmentation evaluations.

开孔聚氨酯泡沫由于其形态和机械响应方面的相似性，经常被用作松质骨替代物。在这项工作中，从形态学和机械学角度对三种不同密度的开孔聚氨酯泡沫进行了表征。显微计算机断层扫描图像的分析表明，高密度泡沫呈现最大的不均匀性。这些不均匀性促进了故障的定位。我们已将有限元模型用作估计可用于数值建模的弹性和破坏特性的工具。此外，我们评估了泡沫塑料的各向异性力学响应，其差异与形态不均匀性有关。我们发现形态与弹性和失效响应之间存在显着关系。