Thermodynamic-consistent microplane theory for quasi brittle materials at high temperatures

RIPANI, MARIANELA; ETSE, GUILLERMO J.; VRECH, SONIA M.; FOLINO, PAULA CECILIA

Resistencia, Chaco

Congreso; MECOM-2021 - XXXVII Congreso Argentino de Mecánica Computacional; 2021

Asociación Argentina de Mecánica Computacional

In this work, a temperature-dependent thermodynamically consistent Microplane Theory is developed at material level to simulate the mechanical failure behavior of quasi-brittle materials like concrete exposed to high temperature fields under dominant tensile stresses. As it is well known, the combination of mechanical and thermal phenomena strongly affects the material brittleness. A temperature-dependent failure criterion based on the smeared cracked approach depending on normaland shear micro-stresses acting on each microplane is implemented. Finally, with the aim to validate the developed constitutive model, obtained numerical results are contrasted against experimental examples from the bibliography.