Imperial College London
Portrait Picture

DrYilunXu

Faculty of Engineering, Department of Materials

Academic Visitor
 
 
 
//

Contact

 

yilun.xu Website CV

 
 
//

Location

 

B301Bessemer BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Yu:2024:10.1016/j.commatsci.2023.112651,
author = {Yu, X and Xu, Y and Morales-Espejel, G and Dunne, F and Dini, D},
doi = {10.1016/j.commatsci.2023.112651},
journal = {Computational Materials Science},
title = {On the importance of Crystal Plasticity Finite Element discretisation for the identification of crack initiation in RCF using energy-based criteria},
url = {http://dx.doi.org/10.1016/j.commatsci.2023.112651},
volume = {232},
year = {2024}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Material microstructure plays a key role in crack initiation under rolling contact fatigue. When studying microstructure with crystal plasticity finite element method (CPFE), mesh sensitivity study is of great importance, as the surface-near region is under high uniaxial stresses. In this paper, a new structured mesh strategy is purposed and compared with the classical unstructured mesh strategy. Modelling tests on a bi-grain and a polycrystal model show the calculation of geometrically necessary dislocation (GND) density, recently proposed as a suitable fatigue damage indicator, is highly dependent on mesh morphology, when GND hotspots tend to appear near distorted elements even in homogeneous materials. With uniform mesh size and shape, structured mesh elements can provide physically more acceptable GND calculations, which is particularly important in loading scenarios with complex stresses, such as rolling contact fatigue. Computational efficiency is also improved compared to unstructured models because a smaller number of elements are required in a structured mesh model and pre-processing of the mesh is not required.
AU  - Yu,X
AU  - Xu,Y
AU  - Morales-Espejel,G
AU  - Dunne,F
AU  - Dini,D
DO  - 10.1016/j.commatsci.2023.112651
PY  - 2024///
SN  - 0927-0256
TI  - On the importance of Crystal Plasticity Finite Element discretisation for the identification of crack initiation in RCF using energy-based criteria
T2  - Computational Materials Science
UR  - http://dx.doi.org/10.1016/j.commatsci.2023.112651
UR  - http://hdl.handle.net/10044/1/108624
VL  - 232
ER  -
Download