Acta Mechanica Solida Sinica

, Volume 30, Issue 4, pp 404–415 | Cite as

Micromechanical simulation on strength and ductility of two kinds of Al-based nanostructural materials

Article

Abstract

The nanostructured Al-based composites possess the combination of high yield strength and good ductility. In this paper, a micromechanical model is presented to simulate the mechanical response of bimodal nanostructured Al and the particle-reinforced aluminum matrix composite (PAMC). The constitutive relations for different phases are addressed in the model, as well as the contribution of microcracks. Numerical results show that the model can successfully describe the enhanced strength and ductility of the bimodal nanostructured Al, and the predictions of the PAMC are in good agreement with the experimental data. It is worth noting that the strength and ductility are sensitive to the volume fraction of constituents and the distribution of microcracks in both bimodal nanostructured Al and PAMC. Therefore, the present theoretical results can be used to optimize the microstructure for improving the mechanical properties of nanostructured Al-based composites.

Keywords

Nanocomposite Mechanism Microcrack Strength Ductility 

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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2017

Authors and Affiliations

  1. 1.State Key Laboratory of Traction PowerSouthwest Jiaotong UniversityChengduChina
  2. 2.Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province, School of Mechanics and EngineeringSouthwest Jiaotong UniversityChengduChina
  3. 3.Department of Engineering Mechanics and Key laboratory of Soft Machines and Smart Devices of Zhejiang ProvinceZhejiang UniversityZhejiangChina
  4. 4.Department of Materials Science and Engineering and Advanced Materials Processing and Analysis CenterUniversity of Central FloridaOrlandoUSA

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