Fatigue Life and Non-Linear Strength Predictions for Heavy Stamping Steel Parts 2015-01-0605
Strength and fatigue life prediction is very difficult for stamped structural steel parts because the manufacturing process alters the localized material properties. Traditional tensile tests cannot be used to obtain material properties due to size limitations. Because of this, FEA predictions are most often “directional” at best. In this paper an improved prediction methodology is suggested. With a material library developed from standard homogenous test specimens, or even textbook material property tables, localized strength and plastic strain numbers can be inferred from localized hardness tests(1). The new method, using standard ABAQUS static analysis (not commercial fatigue analysis software with many unknowns), is shown to be very accurate. This paper compares the new process FEA strength and fatigue life predictions to laboratory test results using statistical confidence intervals. It is suggested that the improved prediction method can lead to better time-to-market, lower development costs, and improved design optimization.
Citation: Yang, G. and Kish, S., "Fatigue Life and Non-Linear Strength Predictions for Heavy Stamping Steel Parts," SAE Int. J. Mater. Manf. 8(3):887-892, 2015, https://doi.org/10.4271/2015-01-0605. Download Citation
Author(s):
Guoyu Yang, Scott Kish
Affiliated:
Tenneco Inc.
Pages: 6
Event:
SAE 2015 World Congress & Exhibition
ISSN:
1946-3979
e-ISSN:
1946-3987
Also in:
SAE International Journal of Materials and Manufacturing-V124-5EJ, SAE International Journal of Materials and Manufacturing-V124-5
Related Topics:
Fatigue
Manufacturing processes
Tensile strength
Steel
Finite element analysis
Stamping
Statistical analysis
Optimization
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