学位论文详细信息
Calibrated localization relationships for elastic polycrystalline aggregates
Materials knowledge system;Multi-scale modeling;Localization relationships;Generalized spherical harmonics;Polycrystal
Yabansu, Yuksel C. ; Kalidindi, Surya R. Mechanical Engineering Neu, Richard W. Pierron, Olivier Antoniou, Antonia Garmestani, Hamid ; Kalidindi, Surya R.
University:Georgia Institute of Technology
Department:Mechanical Engineering
关键词: Materials knowledge system;    Multi-scale modeling;    Localization relationships;    Generalized spherical harmonics;    Polycrystal;   
Others  :  https://smartech.gatech.edu/bitstream/1853/58234/1/YABANSU-DISSERTATION-2017.pdf
美国|英语
来源: SMARTech Repository
PDF
【 摘 要 】

Multiscale modeling of material systems demands novel solution strategies to simulating physical phenomena that occur in a hierarchy of length scales. Majority of the current approaches involve one way coupling such that the information is transferred from a lower length scale to a higher length scale. To enable bi-directional scale-bridging, a new data-driven framework called Materials Knowledge System (MKS) has been developed recently. The remarkable advantages of MKS in establishing computationally efficient localization linkages (e.g., spatial distribution of a field in lower length scale for an imposed loading condition in higher length scale) have been demonstrated in prior work. In prior work, the viability and computational advantages of the MKS approach were demonstrated in a number of case studies involving multiphase composites, where the local material state in each spatial bin of the volume element was permitted to be any one of a limited number of material phases (i.e., restricted to a set of discrete local states of the material). As a major extension, the MKS framework has been extended for polycrystalline aggregates which need to incorporate crystal lattice orientation as a continuous local state. Another important extension of the MKS approach that permits calibration of the influence kernels of the localization linkages for an entire class of low to moderate contrast material systems will also be presented. This major extension of the MKS framework for elastic deformation of polycrystals is achieved by employing compact Fourier representations of functions defined in the crystal orientation space. The viability of this new formulation will be presented for several case studies involving single and multi-phase polycrystals.

【 预 览 】
附件列表
Files Size Format View
Calibrated localization relationships for elastic polycrystalline aggregates 3027KB PDF download
  文献评价指标  
  下载次数:12次 浏览次数:16次