Yue Zhang , Tao Jin , Shiqiang Li , Zhihua Wang , Guoxing Lu
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引用次数: 0
Abstract
In the current work, the initial yield behavior of closed-cell aluminum foams with three different relative densities under complex stress states have been investigated. A total of 16*3 (three different relative densities of closed-cell aluminum foam) experiments were conducted, which included uniaxial compression, uniaxial tension, combined tension-shear, and triaxial compression tests. Experimental results show that the initial yield behavior of closed-cell aluminum foam is isotropic and is associated with the first invariant of stress tensor, the second and third invariants of deviatoric stress tensor. A constitutive model to describe yield behavior of closed-cell aluminum foam was proposed and the relationship between the first invariant of stress tensor and the second invariant of deviatoric stress tensor was analyzed. Furthermore, tension-compression strength asymmetry of foams was introduced in the proposed model.
期刊介绍：
Mechanics of Materials is a forum for original scientific research on the flow, fracture, and general constitutive behavior of geophysical, geotechnical and technological materials, with balanced coverage of advanced technological and natural materials, with balanced coverage of theoretical, experimental, and field investigations. Of special concern are macroscopic predictions based on microscopic models, identification of microscopic structures from limited overall macroscopic data, experimental and field results that lead to fundamental understanding of the behavior of materials, and coordinated experimental and analytical investigations that culminate in theories with predictive quality.
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