Study on constitutive model and mechanical performance test simulation of 6082-T6 based on genetic optimization algorithm

• Published in: Journal of physics. Conference series 2024-07, Vol.2808 (1), p.12062
• Main Authors: Chen, Suokun, Zhang, Qinmin
• Format: Article
• Language: English
• Subjects: Aluminum base alloys; Constitutive models; Elastic limit; Genetic algorithms; Mechanical properties; Modulus of elasticity; Parameters; Performance tests; Proportional limit; Strain analysis; Strain hardening; Stress-strain curves; Tensile strength; Tensile tests
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/2808/1/012062

Through the tensile test of 6082-T6 aluminum alloy sample, the mechanical properties parameters of the material (specified non-proportional tensile strength, tensile strength, elastic modulus E, elongation at break, proportional limit, Poisson’s ratio and strain hardening coefficient N) and the calculation method of strain hardening coefficient N of the constitutive model are analyzed and studied. A method of compiling a genetic algorithm (Ga) based on the Matlab platform to solve the hardening index of aluminum alloy materials is proposed. The results show that 6082-T6 aluminum alloy has good tensile strength and ductility, and the mechanical parameters are less than 3% compared with the national standard. The optimized algorithm is more stable than the traditional method in solving the hardening index n=21. The real stress-strain curve verifies the correctness of the obtained constitutive model, which can be used to predict the mechanical properties of aluminum alloy materials.