Mesoscopic mechanical analysis of filled elastomer with 3D-Finite Element Analysis and transmission electron microtomography
Mesoscopic mechanical analysis of filled elastomer with 3D-Finite Element Analysis and transmission electron microtomography
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DOI：
10.5254/1.3548203
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发表时间：
2008-05-01
影响因子：
1.5
通讯作者：
Shinbori, Yuki
中科院分区：
文献类型：
--
作者：
Akutagwa, Keizo;Yamaguchi, Ken;Shinbori, Yuki
采用三维有限元法对填充弹性体的细观变形进行了分析。三维透射电子显微层析成像（TEMT）和体素有限元法相结合，可以重建介观尺度的三维图像，计算三维应变分布。在一级近似下，计算的应力-应变行为与实验结果吻合较好。在炭黑聚集体之间可以看到超过200%的应变集中，即使总应变仅为15%。还可以观察到被炭黑聚集体包藏的橡胶。计算了由完全分散填料构成的虚拟橡胶模型。这表明整体应力小于用三维TEMT图像重建的实际填充模型。结果表明，橡胶中的硬微区是填料增强橡胶的重要因素。
Analysis of deformation of the filled elastomer in mesoscopic scale was investigated with 3-D FEM (Finite Element Analysis). Combination of 3-D TEMT (Transmission Electron Micro Tomography) and Voxel-FEM enables us to reconstruct mesoscopic scale 3-D image and calculate 3-D strain distribution. To the first approximation, the calculated stress-strain behavior shows a good agreement with the experimental results. The strain concentration over 200% can be seen between carbon black aggregates, even if the overall strain is only 15%. The rubber occluded by carbon black aggregates can also be observed. The virtual rubber model constructed with perfectly dispersed fillers was also calculated. This shows less overall stress than that of the actual filled model reconstructed with 3-D TEMT image. It is found that the occluded rubber can behave as a hard domain and is an important factor of the filler reinforcement effect on rubber.