ProgramMaster Logo
Conference Tools for NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes
Login
Register as a New User
Help
Submit An Abstract
Propose A Symposium
Presenter/Author Tools
Organizer/Editor Tools
About this Abstract
Meeting NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes
Symposium S-02: Advanced Strategies for Inverse Identification of Constitutive Material Models
Presentation Title SUBSTITUTE TALK: FE Analysis of the Enhanced Ductility of Gradient Aluminium Sheets Subjected to Cyclic Skin-pass Rolling
Author(s) Hailiang Yu
On-Site Speaker (Planned) Hailiang Yu
Abstract Scope Gradient-structure microstructures, in which the grain size decreases from micron level in the core to nanoscale at the surface, were found to result in higher ductility and strength. We developed a ‘cyclic skin-pass rolling’ (CSPR) method to enable fabrication of gradient-structure aluminium sheets. Compared with the sheets manufactured by cold rolling, the CSPR-processed sheets show a comparable yield strength and 2.4 times the uniform strain. The gradient structure and compression stress near sheet surface contribute to the higher ductility of the sheets. In order to understand the mechanism of the improvement of the ductility of CSPRed sheets, we developed a finite element model to simulate the tensile processing. FE simulation results show that the maximum plastic strain in CSPR-processed samples is lower than that in CR-processed samples with the same elongation during tensile test. FE simulation results also show that the residual stress in sheets also have great effect on the plasticity deformation of sheets during tensile test. These two kinds of reasons can explain the higher ductility observed in CSPR-processed sheets.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Characterization of Plastic Behavior in a Wide Range of Strain for 6061-O Aluminum Sheet
Determination of Uniaxial Large-strain Workhardening for High-strength Steel Sheets with the Aid of DIC Technique
Effect of Strain Rate on Determining Post-necking Work Hardening of a Low-carbon Steel Sheet
Identification of the Anisotropic Behavior of Sheet Metals using the Virtual Fields Method and Cruciform Specimens
Inverse Calibration of Anisotropic Plasticity Models: A Numerical Study on the Coupling of a Biaxial Test and the Virtual Fields Method
Inverse Identification of Polynomial Anisotropic Material Parameters by Thickness Strain of Thin Sheet Metal
Joining of Ni–Al–Ti sheets under ball collisions
Large Strain Flow Curve Identification for Joining by Forming of Sheet Metal
On the Numerical Efficiency of Inverse Identification Processes of Elastoplastic Constitutive Models using Advanced Parallel Optimization Strategies
On the Use of Direct Approximated Methods to Derive the Stress from the Strain in Plasticity
Optimization of Parameters of Work Hardening Law in Tensile Fracture Simulation of Steel Sheet
Quasi-static, Dynamic, and Thermal Non-contact Strain Measurements Utilizing VIC-3D Digital Image Correlation (DIC) Systems
SUBSTITUTE TALK: FE Analysis of the Enhanced Ductility of Gradient Aluminium Sheets Subjected to Cyclic Skin-pass Rolling
SUBSTITUTE TALK: Forming Behaviour of a 7000-series Plane Strain Dome Specimen during Hot Stamping: Experiments and Models
SUBSTITUTE TALK: On the Failure Criteria for the Onset of Ductile Fracture in Sheet Metals
SUBSTITUTE TALK: The Remarkable Gotoh’s Quartic Yield Function: 40 Years On

Questions about ProgramMaster? Contact programming@programmaster.org