Influence of Failure Strain of Different Aluminium Alloys on Dynamic Problems

• Autorzy: Rodriguez-Millan M. , Vaz-Romero A. , Rodriguez-Martinez J. A. , Rusinek A. , Arias A.
• Języki publikacji: EN

Abstrakty

EN

In this work an experimental-numerical methodology is devised for analyzing ductile frac- ture of two aluminum alloys under different values of stress triaxiality (0:2 1:2) and Lode parameter ( 1 0). The experiments developed include combined loading (tension- torsion) tests on same NT specimen geometry for A 5754-H111 and AA 6082-T6. Numerical analysis shows that this type of specimen exhibits uniformity stable values of stress triaxiality and Lode parameter as plastic strain develops. Experimental results can be used to compare failure strain corresponding to different stress states. Moreover, to consider the influence of stress state in failure mechanics under impact loads, perforation tests of aluminum alloys have been developed in a range of impact velocity between 120 v 500 m/s. The tests were carried out with three di?erent shape projectiles: conical (m = 29:4 g) and two blunt ones (m = 29:4 g and m = 1:1 g). Results show the dependence on energy absorption with stress state and failure strain.

Słowa kluczowe

EN

ductile failure; stress triaxiality; Lode parameter; aluminum; perforation

PL

plastyczność; stan naprężenia; parametr Lode'a; aluminium; perforacja

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Engineering Transactions
• Rocznik: 2012
• Tom: Vol. 60, iss. 4
• Strony: 345--353
• Opis fizyczny: Bibliogr. 6 poz., rys., tab., wykr.

Twórcy

autor

Rodriguez-Millan M.

autor

Vaz-Romero A.

autor

Rodriguez-Martinez J. A.

autor

Rusinek A.

autor

Arias A.

• University Carlos III of Madrid Department of Continuum Mechanics and Structural Analysis Avda. De la Universidad 30, 28911 Legan´es, Madrid, Spain,

Bibliografia

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• 3. Bao Y., Wierzbicki T., On Fracture Locus in the Equivalent Strain and Stress Triaxiality Space, International Journal of Mechanical Sciences, 46, 81–98, 2004.
• 4. Barsoum I., Faleskog J., Rupture Mechanisms in Combined Tension and Shear – Experiments, International Journal of Solids and Structures, 44, 1768–1786, 2007.
• 5. Xue L., Wierzbicki T., Ductile fracture initiation and propagation modeling using damage plasticity theory, Engineering Fracture Mechanics, 75, 11, 3276–3293, 2008
• 6. Stoughton T.B., Yoon J.W., A new approach for failure criterion for sheet metals, International Journal of Plasticity, 27, 3, 440–459, 2011.