Shear Specimens and Dynamic Shear Mechanical Properties of 6061-T6 Aluminum Alloy Sheets

doi:10.3901/JME.2023.04.062

Abstract

Abstract: The body structure is of great significance to the crashworthiness of automobiles, and the load-bearing parts mainly show shear failure during collision. Therefore, it is necessary to study dynamic shear properties of body materials. In order to study the mechanical properties of 6061-T6 aluminum alloy under complex working conditions, quasi-static and dynamic tests were carried out. The parameters of the constitutive and damage models of aluminum alloy were determined based on experiments. By comparing the experimental and numerical simulation result, the accuracy of the material parameters was verified. In order to carry out the shear test of aluminum alloy sheets using the universal tensile testing machine, four kinds of thin-sheet shear specimens were designed. Additionally, the finite element simulation was performed to compare the stress and strain distribution, followed by investigating the influence mechanism of shear strain rates on mechanical properties of 6061-T6 aluminum alloy. The results show that the symmetric circular notched shear specimen is suitable for testing shear fracture strain in plastic stage, while the offset circular notched shear specimen is suitable for testing shear modulus in elastic stage. Moreover, in the case of low shear strain rate, the 6061-T6 aluminum alloy has no significant strain rate effect; however, the sensitivity increases slightly with the increase of strain rate.

Key words: aluminum alloy sheets, shear specimens, shear mechanical properties, strain rate, numerical simulation analysis

CLC Number:

TG146

CHEN Xin, WANG Jianing, YANG Lifei, ZHANG Guanchen. Shear Specimens and Dynamic Shear Mechanical Properties of 6061-T6 Aluminum Alloy Sheets[J]. Journal of Mechanical Engineering, 2023, 59(4): 62-70.

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