Imperial College London
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DrJunJiang

Faculty of Engineering, Department of Mechanical Engineering

Senior Lecturer
 
 
 
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Contact

 

jun.jiang

 
 
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Location

 

523City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Zhou:2022:10.1007/s00170-022-10126-1,
author = {Zhou, X and Sun, C and Wang, B and Jiang, J},
doi = {10.1007/s00170-022-10126-1},
journal = {The International Journal of Advanced Manufacturing Technology},
pages = {145--159},
title = {Investigation and prediction of central cracking in cross wedge rolling},
url = {http://dx.doi.org/10.1007/s00170-022-10126-1},
volume = {123},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Central cracking refers to the formation of internal cavities in cross wedge rolling (CWR) products. It occurs in various materials such as aluminium/titanium alloys, steels and plasticine at room or elevated temperatures, driven by different central cracking mechanisms. However, these mechanisms are still elusive, and a unified central cracking predictive model is absent due to the complex stress states within the workpiece, including triaxial stress states, cyclic loading and severe shear effects. In this study, the underlying fracture mechanisms were revealed, and a robust unified damage model with sound physical meanings was developed using a lab-scale CWR physical model and finite element models. The physical model with the plasticine billets was built, allowing the CWR dies with different geometries rapidly 3D printed and the billets with various ductility efficiently manufactured. The central cracking transiting from brittle to ductile fracture was experimentally observed for the first time using specifically designed plasticine/flour composite samples at varying ductility. The corresponding physics-based central cracking predictive model was proposed and validated quantitatively with 60 groups of CWR tests and compared with ten existing damage models/fracture criteria. This study effectively solves the long-lasting central cracking problem in the CWR industry and enhances the scientific understanding of fracture mechanics in complex engineering applications.
AU  - Zhou,X
AU  - Sun,C
AU  - Wang,B
AU  - Jiang,J
DO  - 10.1007/s00170-022-10126-1
EP  - 159
PY  - 2022///
SN  - 0268-3768
SP  - 145
TI  - Investigation and prediction of central cracking in cross wedge rolling
T2  - The International Journal of Advanced Manufacturing Technology
UR  - http://dx.doi.org/10.1007/s00170-022-10126-1
UR  - https://link.springer.com/article/10.1007/s00170-022-10126-1
UR  - http://hdl.handle.net/10044/1/99896
VL  - 123
ER  -
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