Related Experiment Video
Updated: May 28, 2026

Knowledge Based Cloud FE Simulation of Sheet Metal Forming Processes
Published on: December 13, 2016
A Study on the Evolution of Subsequent Yield Surfaces for Ductile Cast Iron Under Different Pre-Deformation Loading
Shihong Huang1, Shenghuan Qin1, Jie Pang1
1Department of Management Science and Engineering, Guangxi University of Finance and Economics, Nanning 530007, China.
Abstract:
This study experimentally investigates the subsequent yield surfaces of thin-walled tubular ductile cast iron (QT600-7) specimens under various pre-deformation histories and elucidates their evolution patterns. The effects of pre-deformation level, unloading position, and loading path on the subsequent yield surfaces are examined, with particular attention to the concave phenomenon observed in the measured yield surfaces. The results show that the subsequent yield surfaces of QT600-7 translate towards the pre-loading direction. Translation and distortion are more pronounced at smaller offset strains and gradually diminish with increasing offset strains. Under different pre-loading paths, a sharp corner appears in the pre-loading direction and a concave or flattened shape forms in the opposite direction when the offset strain is small; this concave phenomenon tends to disappear under larger offset strains. A higher pre-deformation level leads to more noticeable distortion of the yield surface corresponding to small strains. After pre-tension and unloading, if reverse compression occurs, the subsequent yield surface under small offset strains exhibits a complex shape in the opposite direction.
Related Concept Videos
Stress-Strain Diagram - Ductile Materials
Yield Criteria for Ductile Materials under Plane Stress
The Maximum Shearing Stress Criterion, also known as the...
Temperature Dependent Deformation
Deformation of Member under Multiple Loadings
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
Plastic Behavior
Residual Stresses in Bending

