Fracture Model of Al–Cu Alloys with Gradient Crystals Based on Crystal Plasticity

Author:

Xiao Mao1ORCID,Yao Ji1,Huang Chunyang1ORCID

Affiliation:

1. The Department of Engineering Mechanics, Kunming University of Science and Technology, Kunming 650000, China

Abstract

Gradient grain structure materials with superior mechanical properties of high strength and high toughness have attracted widespread attention. Gradient materials can effectively improve toughness by constructing a microstructure from fine to coarse crystals inside the material, which has gradually become a hotspot of attention in the academic and engineering communities. In this paper, based on the crystal plasticity intrinsic theory, dislocation density is introduced as a characterization quantity, and cohesive units are added at grain boundaries to simulate damage fractures. The results of this study reveal the fracture damage mechanism of gradient crystal structure materials, providing new ideas and methods for the design of gradient materials.

Funder

the Fundamental Research Project of Yunnan Province

Publisher

MDPI AG

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