Simulation of Explosion Using the Ideal Viscoelastic Object Yield Condition

Abstract

In particle-based fluid simulations, viscoelastic materials require yield stress for material deformation. We propose an ideal viscoelastic material yield condition developed by modifying the Tresca’s condition that can be easily approximated using the difference between the maximum and minimum principal stress, unlike the von Mises condition for which the forces in numerous directions applied to an object should be calculated. The proposed ideal viscoelastic material yield condition assumes the area of the object deformed due to the forces applied to it as the principal stress based on the Tresca yield condition. Using this method, the process through which a viscoelastic material explodes because it cannot endure the critical stress when its interface decreases beyond the ideal yield condition can be realistically expressed.