Yield and flow behavior of initially anisotropic aluminum tube under multiaxial stresses

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Journal of Engineering Materials and Technology; (United States)

DOI:https://doi.org/10.1115/1.2902160· OSTI ID:6466516

Takeda, Takenobu ^[1]

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1. Yamagata Univ., Yonezawa (Japan). Dept. of Mechanical Systems Engineering

By means of combining Drucker's yield function with Hill's quadratic yield function, an anisotropic yield function of the sixth degree is proposed. It is able to include the effects of the third deviatoric stress invariant and initial anisotropy. Experiments are carried out on fully annealed 1,050 aluminum tubes under multiaxial stress states. By applying proportional loadings of axial load, internal pressure and torsion to the specimens, the change in yield stress with a rotation of the principal stress axes and the difference between the directions of the principal stress and principal strain increment are examined. The yield surface in the tension-internal pressure stress field reveals orthotropic anisotropy. The yield surface in the tension-torsion stress field lies outside von Mises' yield surface. Such behavioral characteristics can be expressed precisely by the proposed yield function. In addition, it is experimentally verified that the normality rule is obeyed in strain behavior.

• OSTI ID: 6466516
• Journal Information: Journal of Engineering Materials and Technology; (United States), Journal Name: Journal of Engineering Materials and Technology; (United States) Vol. 115:1; ISSN 0094-4289; ISSN JEMTA8
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
ANISOTROPY
ANNEALING
DATA
EXPERIMENTAL DATA
FLOW STRESS
HEAT TREATMENTS
INFORMATION
MECHANICAL PROPERTIES
NUMERICAL DATA
STRAINS
STRESSES
TUBES
YIELD STRENGTH