Journal
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
Volume 48, Issue 9, Pages 1277-1289Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijsolstr.2011.01.011
Keywords
TA-6 V titanium alloy; Anisotropic material; Tension-compression asymmetry; Anisotropic yield function
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Funding
- Belgian Fund for Scientific Research FRS-FNRS
- Belgian Federal Science Policy Office [P6/24]
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The paper presents an experimental study of the quasi-static deformation behavior of a TA-6 V in sheet form. To quantify the plastic anisotropy and the tension-compression asymmetry of this material at room temperature, monotonic tensile and compressive tests were carried out on specimens cut out along several orientations in the plane of the sheet. It was observed that although the tensile flow stress anisotropy is very mild, the Lankford coefficients' anisotropy is very pronounced. To describe the observed mechanical response an elastic/plastic approach was used. Yielding was described using a family of yield criteria that account for strength differential effects and allow an improved description of the anisotropy and its evolution through multiple linear transformations. Comparisons between uniaxial monotonic data and FE simulations using the model show a very good agreement. (C) 2011 Elsevier Ltd. All rights reserved.
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