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首页> 外文期刊>Journal of Cellular Plastics >Application of the variational asymptotic method for unit cell homogenization in the prediction of mechanical properties for microcellular plastics
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Application of the variational asymptotic method for unit cell homogenization in the prediction of mechanical properties for microcellular plastics

机译：变分渐近法用于晶胞均质化在预测微孔塑料力学性能中的应用

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摘要

This study presents the application of the micromechanical variational asymptotic method for unit cell homogenization (VAMUCH) with a three-dimensional unit cell structure and a coupled, macroscaled finite element analysis for analyzing and predicting the effective elastic properties of microcellular injection-molded plastics. A series of injection-molded plastic samples, which include polylactic acid, low-density polyethylene, polypropylene, polystyrene, and thermoplastic polyurethane, with microcellular-foamed structures were produced and their mechanical properties were compared with predicted values. The results showed that, for most material samples, the numerical prediction was in fairly good agreement with experimental results, which suggests the applicability and reliability of VAMUCH in analyzing the mechanical properties of porous materials. Other findings were that the material characteristics (e.g. brittleness and ductility) influenced the predicted results and that VAMUCH prediction could be improved when the unit cell structure was more representative of the real composition.
机译：这项研究提出了微机械变分渐近方法在具有三维晶胞结构和耦合，宏观尺度有限元分析的晶胞均质化（VAMUCH）中的应用，以分析和预测微孔注塑塑料的有效弹性。生产了一系列注射成型的塑料样品，其中包括聚乳酸，低密度聚乙烯，聚丙烯，聚苯乙烯和热塑性聚氨酯，具有微孔泡沫结构，并将其机械性能与预测值进行了比较。结果表明，对于大多数材料样品，数值预测与实验结果相当吻合，这表明VAMUCH在分析多孔材料力学性能方面的适用性和可靠性。其他发现是材料特性（例如脆性和延展性）影响了预测结果，并且当晶胞结构更能代表真实成分时，可以改善VAMUCH预测。

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