Abstract
Lightweight alloy, featuring with low strength, is easy to fracture, thus limiting their applications in vehicle engineering. Current research proposes a constitutive model inspired by the Johnson–Cook (JC) material model and the generalized incremental stress-state-dependent damage (GISSMO) fracture model. The model captures the ductile and fracture behavior for a 7003-aluminum alloy with different stress states and strain rates, thus improving the finite element (FE) simulation accuracy. An engineering example is given to demonstrate the versatile application for the constitutive model. The engineering example is the optimization design for a newly designed bumper. Shape and size optimization are conducted for bumper, in order to minimize the mass while keep the crash performance. The results show: (1) the constitutive model can capture the ductile and fracture behavior for the 7003-aluminum alloy, deducing from the consistency between simulation and experiment; (2) the engineering example shows the optimized bumper has the minimum mass with the satisfactory crash performance.
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This research was funded by Fundamental Research Funds for the Central Universities, grant number 2018CDXYTW0031 and Graduate Scientific Research and Innovation Foundation of Chongqing, grant number CYB18060.
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**ao, Y., He, Z. A Continuum Constitutive Model for a 7003-Aluminum Alloy Considering the Stress State and Strain Rate Effects. Iran J Sci Technol Trans Mech Eng 47, 741–751 (2023). https://doi.org/10.1007/s40997-022-00544-7
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DOI: https://doi.org/10.1007/s40997-022-00544-7