Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/50690
Title: Estimation on effective modulus of polycrystalline aggregates in various geometric configurations
Authors: Xie, Xiao Mei
Keywords: DRNTU::Engineering::Materials::Mechanical strength of materials
DRNTU::Engineering::Computer science and engineering::Computing methodologies::Simulation and modeling
Issue Date: 2012
Source: Xie, X. M. (2012). Estimation on effective modulus of polycrystalline aggregates in various geometric configurations. Doctoral thesis, Nanyang Technological University, Singapore.
Abstract: Polycrystalline aggregates are made in a wide array of geometric configurations (thin wire, thin film, and bulk configurations, to name a few) for engineering applications. Various elastic moduli have been reported for these configurations. The inconsistence of Young’s modulus has been attributed to micro-defects and microscopic texture in the existing open literature. In the present study, the modulus variation of the polycrystalline aggregates in various geometric configurations is explained from a new perspective, i.e., the constraint and interaction among the grains. A finite element scheme with statistic consideration based on the Central Limit Theory is employed to systematically investigate the effective Young’s modulus of the polycrystalline copper aggregates in various geometric configurations. The correlation between the effective modulus of the polycrystalline copper and the geometric configuration is fully pictured. For the polycrystalline copper, the spread of the effective modulus due to the geometric configuration could be as large as 20%.
URI: https://hdl.handle.net/10356/50690
DOI: 10.32657/10356/50690
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Theses

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