The lack of understanding of true deformation and failure mechanisms in ceramic materials for armour applications hinders the development of novel materials and the corresponding potential for improved armour solutions. Numerical modelling plays a key role in gaining the required understanding at all relevant length scales. While micro-scale modelling provides new insights into the role of various material characteristics, at the macro-scale such information enables more accurate simulation of the ballistic material behaviour when designing components and structures. Nevertheless, most of the existing macroscopic material models for the numerical simulation of ceramic armour are still based on continuum approaches assuming isotropic material response to impact loading. The constitutive model presented in this work allows for non-isotropic behaviour by proposing the damage as a tensor. Moreover the model incorporates aspects of the physics governing the compressive damage by basing the damage tensor evolution on considerations of crack growth at lower scales.
A new anisotropic constitutive model for ceramic materials failure
Ein neues anisotropes Werkstoffmodell für das Versagen keramischer Werkstoffe
2012
11 Seiten, 8 Bilder, 13 Quellen
Conference paper
English
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