A constitutive equation for ceramic materials used in lightweight armors Articles uri icon

publication date

  • December 2011

start page

  • 2316

end page

  • 2324

issue

  • 23-24

volume

  • 89

international standard serial number (ISSN)

  • 0045-7949

electronic international standard serial number (EISSN)

  • 1879-2243

abstract

  • A constitutive model to simulate the behavior of ceramic materials under impact loading is proposed in order to achieve a better representation of the damage process due to the material fragmentation. To integrate the proposed constitutive equations, a semi-implicit algorithm (implicit for the stresses and explicit for the damage variable) has been developed, leading to the generalized expressions of the classical return mapping algorithm. The model was implemented in a commercial finite element code and its performance was demonstrated by comparing its predictions with experimental results obtained by other authors.A constitutive model to simulate the behavior of ceramic materials under impact loading is proposed in order to achieve a better representation of the damage process due to the material fragmentation. To integrate the proposed constitutive equations, a semi-implicit algorithm (implicit for the stresses and explicit for the damage variable) has been developed, leading to the generalized expressions of the classical return mapping algorithm. The model was implemented in a commercial finite element code and its performance was demonstrated by comparing its predictions with experimental results obtained by other authors.

keywords

  • ceramic; constitutive equation; return mapping algorithm; impact; armor; damage;