Dislocation-Based Strengthening Mechanisms in a Nano-Particle Reinforced Composite

CSME 2026/10
Volume 47 No.5 : 511-515
DOI:10.29979/JCSME.202610_47(5).0011

Dislocation-Based Strengthening Mechanisms in a Nano-Particle Reinforced Composite

Shafique M. A. Khan ^a and Numan Abudheir ^b
^aDepartment of Mechanical Engineering, West Virginia University, Institute of Technology, Beckley, WV, USA
^bDepartment of Mechanical Engineering, King Fahd University of Petroleum and Minerals, Dhahran, KSA

Abstract: The present paper presents a 3D numerical analysis of a nanoparticle reinforced crystalline metal using a multi-scale simulation technique: the Multi-scale Discrete Dislocation Plasticity (MDDP). This model couples two length scales: discrete dislocation dynamics (meso) and finite element analysis (continuum). The crystalline metal considered is aluminum and nano-sized SiC particles are used for reinforcement. An attempt is made to understand the change in mechanical properties of metal reinforced with nanoparticles from the viewpoint of dislocation theory using the MDDP simulation model. The formation of prismatic loops is observed and the increase of tensile strength and decrease in percentage elongation is explained based on this observation.

Keywords: Nanocomposites; Dislocation dynamics; Multi-scale modeling; Strengthening mechanism.

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