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Meeting Materials Science & Technology 2019
Symposium Formability and Fracture of Metal Sheets
Presentation Title Stress-strain Response in the Early Stage of Hydraulic Bulge Testing
Author(s) Lulu Deng, Junying Min, John E. Carsley, Thomas Stoughton, Jianping Lin
On-Site Speaker (Planned) John E. Carsley
Abstract Scope Inherent bending issues in the early stage of hydraulic bulge testing affects characterization of the elastic stress-strain response. Hydraulic bulge and cruciform biaxial tensile tests as well as numerical simulation of hydraulic bulging were carried out to understand the role of bending issues. The directly calculated elastic moduli from hydraulic bulging using classical membrane theory were smaller than those measured in cruciform tests of aluminium alloy AA6022 and high strength steel MP980. The difference between the calculated modulus from hydraulic bulging and the real modulus results from asynchronous transfer from elastic to plastic deformation of the layers through the thickness direction of bulged sheet in the early bending stage, and therefore depends on the thickness and yield strength of the sheet as well as tool geometry used for bulge testing. Recommendations are provided to process the stress strain response in the early stage of hydraulic bulge testing.
Proceedings Inclusion? Definite: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Method to Predict the Ductile Fracture of Metal Sheets under Complex Plane Stress
Anisotropic and Time-dependent Continuum Damage Coupled Plasticity Model for Predicting Ductile Fracture of AA 6xxx
Behavior of Quenched-and-Partitioned Steels Deformed at Elevated Temperatures
Biaxial Tensile Testing Using Laser-deposited Cruciform and Its Extension to Non-proportional Loading
Deformation Mode Effects on Austenite Stability of Quenched-and-Partitioned Steel Measured via X-ray Diffraction and Electron Backscattered Diffraction
Distortional Anisotropic Hardening Model for Describing Complex Bauschinger and Transient Effects in Metal Forming Simulations
Edge Stretchability of Hot Rolled High-strength Low-alloy Steel
Effect of Ultrasonic-assisted Two-point Incremental Sheet Forming (UA-TPIF) on Surface Finish
Mechanical Behavior of Ni and Cr added Bainite/ Martensite Multiphase Steels
Mitigation of Edge Cracking during Accumulative Roll Bonding of Aluminum Alloys
P3-90: Prediction Method of Voids Distribution in the Punched Surface of the Spheroidizing Annealed Medium Carbon Steel Sheet by the Scrap
Stress-strain Response in the Early Stage of Hydraulic Bulge Testing
Study of GP-zone/MgZn2 Precipitation Coupled with Deformation in Al-Zn-Mg-Cu to Overcome the Strength-ductility Paradox
The Influence of Phase Constituents on Hole Expansion Capacity of Multi-phase Steels

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