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A rate-dependent constitutive equation for 5052 aluminum diaphragms

Hosseini Kordkheili, S. A ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matdes.2014.03.003
  3. Abstract:
  4. In this article, both experimental and numerical approaches are conducted to present a constitutive equation for 5052 aluminum diaphragms under quasi-static strain rate loadings. For this purpose the stress-strain curves at different strain rates are obtained using tensile tests. Brittle behavior during tensile tests is observed due to samples thin thicknesses. Employing Johnson-Cook constitutive equation no yields in reasonable agreement with these tensile tests results. Therefore, developing a more suitable constitutive equation for aluminum diaphragms is taken into consideration. This equation is then implemented into the commercial finite element software, ABAQUS, via a developed user material (UMAT) subroutine utilizing von Mises plasticity theory and an own solution algorithm. A single-element pathological test method is adopted to show the well-development of the UMAT subroutine. In order to verify the proposed constitutive equation for precision predicting of mechanical behavior, a bulge test is performed in which demonstrates a good agreement between experimental and numerical results
  5. Keywords:
  6. Aluminum diaphragms ; Rate-dependent constitutive equation ; Tensile test ; Von Mises plasticity theory ; Abaqus ; Aluminum ; Diaphragms ; Finite element method ; Plasticity ; Strain rate ; Stress-strain curves ; Subroutines ; Tensile testing ; Finite element software ; Johnson Cook constitutive equation ; Mechanical behavior ; Numerical approaches ; Numerical results ; Quasi-static strain rates ; Solution algorithms ; Von-Mises plasticity ; Constitutive equations
  7. Source: Materials and Design ; Vol. 60, Issue 1 , 2014 , pp. 13-20 ; ISSN: 02613069
  8. URL: http://www.sciencedirect.com/science/article/pii/S0261306914001897