Numerical homogenization of elastic and thermal material properties for metal matrix composites (MMC)

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• 作者：Stefan Schindler ; Julia Mergheim…
• 关键词：Numerical homogenization ; Metal matrix composites ; Thermomechanical ; Material modeling
• 刊名：Continuum Mechanics and Thermodynamics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：29
• 期：1
• 页码：51-75
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Classical and Continuum Physics; Engineering Thermodynamics, Heat and Mass Transfer; Theoretical and Applied Mechanics; Structural Materials;
• 出版者：Springer Berlin Heidelberg
• ISSN：1432-0959
• 卷排序：29

文摘

A two-scale material modeling approach is adopted in order to determine macroscopic thermal and elastic constitutive laws and the respective parameters for metal matrix composite (MMC). Since the common homogenization framework violates the thermodynamical consistency for non-constant temperature fields, i.e., the dissipation is not conserved through the scale transition, the respective error is calculated numerically in order to prove the applicability of the homogenization method. The thermomechanical homogenization is applied to compute the macroscopic mass density, thermal expansion, elasticity, heat capacity and thermal conductivity for two specific MMCs, i.e., aluminum alloy Al2024 reinforced with 17 or 30 % silicon carbide particles. The temperature dependency of the material properties has been considered in the range from 0 to \(500{\,}^\circ \mathrm {C}\), the melting temperature of the alloy. The numerically determined material properties are validated with experimental data from the literature as far as possible.