Experimental study on the mechanical behavior of 5A90 aluminum-lithium alloy subjected to combined tensile-shear loadings The combined strength of 5A90 aluminum-lithium alloy

Abstract

This paper presents experimental and numerical studies on the mechanical behavior of 5A90 aluminum-lithium alloy under combined tension and shear loading. Extensive experimental tests under tension and combined loading were conducted, and the influence of material direction, notch radius, and load angle were considered. Based on the test results, the yield strength, ultimate strength, fracture displacement, strain-stress curve, and displacement-stress curve were obtained, discussed, and analyzed. The finite element model (FEM) including fracture behavior was developed, and it was found that the established FEM can well predict the mechanical response of 5A90 aluminum-lithium alloy. Parametric studies were also conducted. Finally, by comparing with the results from FEM (and tests) and predictions from available design codes, the calculation method in Eurocode 9 was suggested to predict the combined strength of 5A90 aluminum-lithium alloy.

Keywords

• 5A90 aluminum-lithium alloy
• Combined tension and shear loading
• Finite element model
• Fracture behavior
• Calculation method