论文标题
用于虚拟动态机械分析实验的FFT溶剂：应用于玻璃/无定形系统和颗粒复合材料
An FFT-solver used for virtual Dynamic Mechanical Analysis experiments: Application on a glassy/amorphous system and on a particulate composite
论文作者
论文摘要
许多研究人员群体越来越多地使用了基于FFT的求解器。 A development is reported here that concerns the viscoelastic behavior of composite structures generally studied experimentally through Dynamic Mechanical Analysis (DMA).在复杂值量下开发的平行计算代码，在由机械性能的素素网格描述的异质系统上直接在频域中提供了虚拟DMA实验。所达到的精度和计算时间非常好。已经努力从文献中发现的两个示例开始，从而表明了这种虚拟DMA工具的应用：玻璃/无定形系统的建模是小规模的玻璃/无定形系统的建模，以及DMA在温度扫描模式下通过DMA在玻璃珠制成的颗粒复合材料和较大尺度的聚类型Matrix中获得的实验数据的建模。这两个示例都表明了虚拟DMA如何在理论或实验观点上促进问题，分析，理解放松现象。
FFT-based solvers are increasingly used by many researcher groups interested in modelling the mechanical behavior associated to a heterogeneous microstructure. A development is reported here that concerns the viscoelastic behavior of composite structures generally studied experimentally through Dynamic Mechanical Analysis (DMA). A parallelized computation code developed under complex-valued quantities provides virtual DMA experiments directly in the frequency domain on a heterogenous system described by a voxel grid of mechanical properties. The achieved precision and computation times are very good. An effort has been made to show the application of such virtual DMA tool starting from two examples found in the literature: the modelling of glassy/amorphous systems at a small scale and the modelling of experimental data obtained in temperature sweeping mode by DMA on a particulate composite made of glass beads and a polystyrene matrix, at a larger scale. Both examples show how virtual DMA can contribute to question, analyze, understand relaxation phenomena either on the theoretical or experimental point of view.
