Numerical Simulation of Fatigue Damage and Shape Instability Behavior of Steel 40Cr by the Damage-Coupled Crystal Plastic Model

Numerical Simulation of Fatigue Damage and Shape Instability Behavior of Steel 40Cr by the Damage-Coupled Crystal Plastic Model

Wu, G.C. ; Li Y., F. ; Pan, X.D. ; Wang, G.L.

Інші назви: Численное моделирование формоизменения стали 40Сг в условиях циклического нагружения в упругопластической постановке

Тема: Научно-технический раздел

УДК: 539.4

URI: http://dspace.nbuv.gov.ua/handle/123456789/173591

Посилання: Numerical Simulation of Fatigue Damage and Shape Instability Behavior of Steel 40Cr by the Damage-Coupled Crystal Plastic Model / G.C. Wu, Y.F. Li, X.D. Pan, G.L. Wang // Проблемы прочности. — 2017. — № 1. — С. 132-139. — Бібліогр.: 20 назв. — англ.

Підтримка: This study is supported by the National Natural Science Foundation of China (51405101), the research and innovation fund of Harbin Institute of Technology (Grant Number HIT.NSRIF.2015 053), the China Postdoctoral Science Foundation (Grant Numbers 2014M561340 and 2016T90277) and Heilongjiang Postdoctoral Fund (Grant Number LBH-Z14100).

Дата: 2017

Завантажень: 275

Numerical Simulation of Fatigue Damage and Shape Instability Behavior of Steel 40Cr by the Damage-Coupled Crystal Plastic Model

Анотація:

A representative volume element is developed based on the Voronoi tessellation to reveal the mechanism of shape instability behavior. In the model, a damage-coupled crystal plastic model is established to describe the shape instability behavior. The heterogeneity of materials is introduced into the model with the aim of simulating the microstructure of materials. The experimental and simulation results show that the fatigue damage in the elastic deformation stage with high cyclic stress level is the initial motivation of shape instability behavior. The cyclic softening and ratcheting properties of materials accelerate the plastic strain accumulated rate.

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