Failure prediction and validation of a steel automotive safety part
TypeCommunications avec actes
The objective of this work was to investigate thefailure behaviour of a HSLA steel component subjected to a bending unbending operation. This study was conducted through a combined experimental and numerical approach to better understand the limitations of current models and generate more suitable data that can be used to further optimize the manufacturing process. The numerical approach was carried out using two finite element codes (ABAQUS and PAM-STAMP) and two fracture models (Gurson and CrachFEM). The material and fracture data to be used in the numerical simulations was obtained through mechanical tests (tensile and shear tests) conducted to identify the monotonic and damage behaviour of $500 MC. Furthermore, bending and unbending tests were performed with the purpose of validating the models and study the operating performance of this material when subjected to these kinds of loading. The final purpose of this work is to present a numerical approach that can accurately predict the mechanical and failure behaviour of a real automotive safety component.
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Experimental and numerical analysis of micromechanical damage in the punching process for High-Strength Low-Alloy steels ACHOURI, Mohamed; GERMAIN, Guénaël; DAL SANTO, Philippe; SAIDANE, Delphine (Elsevier, 2014)Sequential sheet metal forming processes can result in the accumulation of work hardening and damage effects in the workpiece material. The mechanical strength of the final component depends on the “evolution” of these two ...
ACHOURI, Mohamed; GERMAIN, Guénaël; DAL SANTO, Philippe; LEBRUN, Jean-Lou; SAIDANE, Delphine (Scientific.Net, 2011)This work deals a contribution to ductile damage of High-Strength Low-Alloy (HSLA) steel steels under low stress triaxiality. This work is based on micrographics observations and in situ shear tests to examine the evolution ...
Numerical integration of an advanced Gurson model for shear loading: Application to the blanking process ACHOURI, Mohamed; GERMAIN, Guénaël; DAL SANTO, Philippe; SAIDANE, Delphine (ELSEVIER, 2013)A new extension of the Gurson damage model has been proposed recently to predict ductile fracture under shear dominated loads. The aim of this work is to verify the ability of this approach to simulate, in an accurate way, ...
Experimental characterization and numerical modeling of micromechanical damage under different stress states ACHOURI, Mohamed; GERMAIN, Guénaël; DAL SANTO, Philippe; SAIDANE, Delphine (ELSEVIER, 2013)The use of HSLA steels for the manufacture of automotive components is interesting from an engineering point of view. This family of steels, while possessing high strength, also has good formability and can be used in ...
Implementation and validation of a Gurson damage model modified for shear loading: effect of void growth rate and mesh size on the predicted behavior ACHOURI, Mohamed; GERMAIN, Guénaël; DAL SANTO, Philippe; SAIDANE, Delphine (Scientific.Net, 2012)The optimization of automotive security components requires good knowledge of the material state after fabrication, particularly with respect to damage that may have been done to the material by the manufacturing process. ...