Improved characterization of failure behaviors of sheet metals based on pattern recognition methods
Third party funded individual grant
Start date : 01.01.2021
End date : 31.12.2022
Extension date: 30.06.2023
Project details
Short description
The forming limit curve (FLC) is used in industry to evaluate the failure limits of sheet materials and is determinied by Nakajima tests. During the test, an optical strain measurement of the specimen surface is performed simultaneously, which allows the calculation of the limit strain value. For a correct process description, including FLC, an improved automated generation of failure characteristics and time by applying pattern recognition methods is helpful. The developed method is extended and adapted to additional test methods in the field of material characterization, such as uniaxial and notched tensile-, hydraulic bulge- and bending tests. For validation purposes, metallographic investigations and interwies evaluated by experts will be performed.
Scientific Abstract
The forming limit curve (FLC) is used in industry to evaluate the failure limits of sheet materials and is determinied by Nakajima tests. During the test, an optical strain measurement of the specimen surface is performed simultaneously, which allows the calculation of the limit strain value. For a correct process description, including FLC, an improved automated generation of failure characteristics and time by applying pattern recognition methods is helpful. The developed method is extended and adapted to additional test methods in the field of material characterization, such as uniaxial and notched tensile-, hydraulic bulge- and bending tests. For validation purposes, metallographic investigations and interwies evaluated by experts will be performed.
